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Home My WebLink About20183896.tiffUSE BY SPECIAL REVIEW (USR) APPLICATION DEPARTMENT OF PLANNING SERVICES 1555 N. 17' AVENUE* GREELEY, Co 80631 wwvv.weldgovecom 970 400-6100 FAX 970-304-6498 FOR PLANNING DEPARTMENT USE: AMOUNT APPLICATION RECEIVED BY DATE RECEIVED: CASE # ASSIGNED: PLANNER ASIGNED: Parcel Humber" 0 Address of site: 7 0 7 _ Vacant Land 2 I Legal Description: Lot D Recorded Exemption P.EC 17-0012 Section: S Zone District: A Acreage: 120 Floodplain: FEE OWNER(S) OF THE PROPERTYr: Name: Coailbanti, Investments, LLC c/a Kevin Bailey, COO CA 12 digil number on Tax IFD: information. obtainable at WNW. scorn). Township: 7 N Range: 66 W eclogical Hazard: YCN Airport Overlay' Company: Coalbank Investments, LLC - Subsidiary Company of WIC Development, LLC Phone #: Email: Kbafey _ rirnrockenergy.com Street Address: 5956 Sherry Lane, Suite 825 City/State/Zia Code: Name: Dallas, Texas 75225 Company: Phone #: Street Address: Email: City/State/Zip Code: Name: Authorized Agent : Anne Best Johnson Company: Tetra Tech Inc, Phone #: 720-204-0173 Street Address: 1550 Broadway, Suite 1400 City/State/Zip Code: Denver, CO 80202 Email: Anie.Johnson@tetratech.com APPLICANT C P AUTHORIZED AGENT: (See below: Authorization must accompany all applications signed by Authorized Agents) Name: Ryder Reddick Company: Tetra Tech Inc. Phone #: 72O164-4603 Email Ryder.Reddick(@tetrateoh.cora Street Address: 1900 S. Sunset Sty, Suite 1E City/St aterZip Code: Longnmont, CO 80501 PROPOSED USE. Proposed Natural Gas Compressor Station Site I wife) hereby depose and state under penalties of perjury that all statements, proposats, and/or plans submitted with or contained within the application are true and correct to the hest of my (onr)knowledge. Signatures of all fee owners of property must sign this application. If an Authorized Agent signs, a letter of authorizalion from all fee owners must be included with the application. If a corporation is the fee owner, notarized evidence must be included indicating that the signatory has to legal authority to sign for the corporation. stt i ir Signature: Owner Or Authorized Agent Date Print Name Signature: Owner or Authorized Agent Date Print Name R'eV 4120W DEPARTMENT OF PLANNING AND BUILDING DEPARTMENT OF PUBLIC HEALTH AND ENVIRCNNI 'LENT 1 555 NORTH 17TH AVENUE GREELEY, Co 80631 AUTHORIZATION FORM it e) Coalbank Investment ent Partners, LLC give permission to Tetra Tech Anne Best Johnson, Ryder Re&lick (Authorized Agent— please print) (Owner —please print) to apply for any Planning, Building or Septic permits on our behalf, for the property located at (address or parcel number) below: 0707-08-2-00-017 Lot D Recorded Exemption RECX17-O012 17-0012 Legal Description: Lot EC - 1 2 Subdivision Name: " of Section 6 , Township 7 Property Owners Information: ddre : Coalbank Investment Partners, LLC e/e Kevin Bailey A NI Range 66 Lot_ Bock. x(4°5)4 9 1e ry �.y �� Phone: mail .Batley@rmnirockenergy1corn Authorized Agent Contact Information: Address: Tetra Tech 19G0 S. Sunset St., Suite I E, Longmont, 00 80501 Phone: 720-4-0173 E -Mail: AnnaJohnson Tetratech.corn Correspondence ondence to he sent to: Owner 11 Authorized Agent Additional Info: Additional Tetra Tech Authorized Personnel Contact Info: Both / by Mail Email Email: Ryder'.Reddick Tetratechzcom Phone: (20)864-4603 Owner Signature: A 64si Date:. N' I Owner Signature: Date: COALBANK K INVESTMENT PARTNERS, LLC - SEVERANCE COMPRESSOR STATION N USR QUESTIONNAIRE The following statements in bold font are USR questions required by Weld County for the USR Narrative. Questions that do not pertain to this project arc noted as "Not applicable" according to the Weld County document instructions. Planning Questions 1. Explain, in detail, the proposed use of the property. This facility will compress raw low pressure natural gas so that it can be transported to a downstream facility for further processing. Natural gas will enter and exit the facility via steel pipelines. The compressor station will also have separation and filtration equipment that will remove water, condensate, and other impurities from the natural gas stream. Condensate liquids will be pumped off site through a pressurized pipeline for further processing and sale. Any collected water will be trucked offsite and disposed of in accordance with federal, state and local regulations. The proposed facility includes equipment listed in the Building section under question 1. As a high-level summary, the equipment will include combustors, launchers, receivers, pumps, tanks, catchers and separators. The proposed facility will be developed in two phases, depending on the volume needs from producers. Currently, the applicant has commitments from producers for phase 1. The intent of the application is to illustrate the contemplated buildout of the facility. A space for a laydown yard has also been planned on the site in case such a space is needed by Coalbank Investment Partners, LLC or its subsidiary companies in the future. 2. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 22 of the Comprehensive Plan. The proposed facility has been engineered, designed and sited to be consistent with the intent of the Comprehensive Plan in many ways. In addition, site selection was carefully considered. To follow are policies or goals from the Comprehensive Plan in italic font followed by a description illustrating how this proposed facility conforms. A.Policy 7.2: Conversion of agricultural land to nonurban residential, commercial, and industrial uses should be accommodated when the subject site is in an area that can support such development and should attempt to be compatible with the region. The land that will be used for the compressor site is designated as Prime Farm Land if Irrigated per the USDA Important Farmlands of Weld County Map. All the water rights on this parcel have been sold off limiting the use of the parcel as prime farmland as the land sits today. Ofthe the 120 gross acres that encompass this parcel, only 25 acres of this site at proposed "full build -out" are envisioned to be used for the proposed compressor station and laydown yard. The compressor station is also proposed to be located primarily in the traditional pivot corner of the parcel. Therefore, if agricultural production were to ever occur on the majority of the parcel that is not proposed to be developed per this application, the proposed site location would limit the compressors footprint on prime farmland as much as possible. The compressor station is at least 1,500 feet away or farther from the nearest home site and is along a proposed pipeline project that is running natural gas from the Towns of Windsor and Severance up to a proposed Town of Pierce Gas Plant that will be located just northeast of the intersection of County Road 90 & County Road 29. The proposed development will be compatible with the neighboring uses in the region and will limit the effects this proposed industrial use will have on the neighboring agricultural zoned parcels and uses. The applicant has also reached out to, and worked with, all surrounding neighbors to minimize any unforeseen impacts neighboring property owners may have up front and have and will also work to minimize all compatibility concerns that those neighbors have had and may have as the project moves forward. A.Policy 9.5: Applications fora change of land use in the agricultural areas should be reviewed in accordance with all potential impacts to surrounding properties and referral agencies Encourage applicant to communicate with those affected by the proposed land use change through the referral process. On Tuesday July 24, 2018, an Open House was held at the Ault Fire Station Located at 16680 State Highway 14 Ault, Co. The meeting invitation was mailed on Friday July 13, 2018 to all property owners within 1,000 Feet from the 120 -acre parcel. Two individuals attended the meeting. Participants were shown the planned site design and layout and given facts about the proposed compressor station facility and why it is being proposed. At the end of the meeting the neighbors in attendance mainly had concerns about the access being in a low spot through the Coal Bank floodplain. To mitigate these concerns, it was explained to the neighbors that a separate Flood Hazard Development Permit will be applied for through Weld County, for that new proposed access point and road to the site. It was also explained that the road must be engineered out of the floodplain before the road will be approved for use as access for the compressor site. The neighbors were also given the applicants (and their representatives) contact information for any further questions or concerns that may have come up as the proposal move through the permitting process. Lastly, before submitting the USR application to Weld County, the applicant met with both the Water Supply Storage Company which manages the Collins Lateral Irrigation Ditch located south of and adjacent to the proposed compressor site development, and the Pierce Lateral Company which manages the Pierce Lateral Irrigation Ditch that runs north of and adjacent to the proposed compressor site development. Two separate meetings were held so that the applicants and the two separate ditch companies could discuss the proposed site layout and drainage. • The meeting between the applicant and the Pierce Lateral Company took place on Thursday August 9, 2018. After visiting the site and showing the ditch company representatives the proposed site maps, access, and drainage feature layout, the representatives for the Pierce Lateral Company found no issues relating to the proposed development and their ditch located to the north of the site. They came to this conclusion because the drainage from the site does not affect their ditch and there is no proposed road access coming from e north of the site across their ditch. • The meeting between the applicant and the water Supply Storage Company took place on Tuesday August 7, 2018. After visiting the site and going over the proposed site maps, access and drainage feature layout, the representatives for the Water Supply Storage Company asked that the applicant prepare a hydrology plan relating to the drainage on site and provide a copy to the plan for their review. The hydrology/drainage plan being sub i 'tted with this application is the same plan that will be submitted to the Water Supply Storage Company for their review. The applicants have engaged in communications up front wi all the surrounding property owners and interested neighboring ditch companies though mail correspondence, a community meeting, and on -site meetings with the ditch companies. With this continued open line of communication with the surrounding interests along with the site design, Coalbank Investment Partners, LLC believes this proposed plan shows evidence that the site can be supported in the location it is proposed and will be compatible with the surrounding land uses. O .Goal 1: Promote the reasonable and orderly exploration and development of oil and gas mineral resources; AND OG,Goal 2: Ensure that the extraction of oil and gas resources conserves the land and minimizes the impact on surrounding land and the existing surrounding land use. The facility is located along the alignment of two proposed natural gas pipeline(s). These pipelines are under review for a USR in Weld County submitted by NWC Development LLC which like Coalbank development Partners, LLC is another subsidiary company of Rimrock Energy Partners. The proposed pipeline(s) known as the Pierce Trunk and Raindance Lateral Pipeline(s) run natural gas from the Towns of Windsor and Severance up to the Proposed Pierce Gas Plant which is also currently in the permitting process with the Town of Pierce. This specific parcel of land is a convenient location for a compressor facility due to its proximity with the alignment of the proposed gas lines and the proposed gas processing plant in the Town of Pierce. It is the optimal size lot for a proposed compressor station site as it will be located over 1,500 feet away from the nearest residential home site and in a location that minimizes the effect the station can have on prime farm land and other existing land uses. The compressor facility where it is proposed, will also minimize the need for other stations like it to be built along the pipeline route on neighboring sites that may not have conditions as favorable regarding compatibility that this proposed site will have with the current neighboring surrounding land uses. Additionally, attempts to mitigate site impact concerns raised by surrounding properties have been completed though the continued communication with neighboring property owners and other interest holders ahead of this proposal being submitted to the County. The applicant plans to continue to maintain contact with property owners throughout the permitting process. 3. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 23 (Zoning) and the zone district in which it is located. The property is in the Agricultural Zone District. According to section 23.3-40.A.2 of the Weld County Code, oil and gas support and service facilities, as proposed on this application, is a use contemplated through the Use by Special Review process in the Agricultural Zoning District. 4. Describe what type of land uses surround the site. Explain how the proposed use is consistent and compatible with surrounding land uses. The Proposed Compressor Station will be located in the southeast corner of a 120 +1- acre parcel of land zoned A. (Agricultural) and known as Lot D of RECX17-0012. The land surrounding this parcel is currently zoned A (Agricultural). The existing residential structures on surrounding properties are 1,500 feet away and further from the proposed compressor station (See Map below). The existing land use of surrounding properties are described below. • North: The parcel to the north contains one homesite. The residential structure is approximately 2,000 feet north of the proposed facility. • South: The parcel closest to the proposed compressor station is located adjacent to and southeast of the proposed site. The land use for this parcelcontains a Use by Special Review Permit for a confined animal feeding operation for up to 5,000 head of cattle and sheep. There are three homesites to the south of the proposed facility all of which are over 2,700 feet away and all directly next to State Highway 14. • East: The parcel to the east contains one residential homesite. The residential structure nearest to the proposed compressor facility is located northeast of the proposed facility and is located approximately 1,700 feet away from the proposed facility. • West: There is also one parcel to the west that contains a residence, and it is located southwest of the proposed compressor facility on the west side of County Road 27. The residential structure is approximately 2,090 feet north of the proposed compressor facility. As with any change in land use, there are potential impacts to surrounding property owners. The applicant has been an operator in Weld County for many years. They understand that being a good neighbor is a best practice. In siting this facility, noise, air quality and lighting were considered. The following paragraphs describe how the applicant has considered these potential changes and mitigated even perceived impacts. Light: The impact from light onto adjacent properties will be minimized. The lights that will be on site, will be manually turned on by an operator when needed. No security lighting is proposed, however, shielding for the manual outdoor lights is proposed to help mitigate any light pollution that may occur during those times an operator needs to access the facility at night. The International Dark Sky Standards were utilized in developing the lighting plan for this application. Air Qua lity: The following measures will be deployed to safeguard air quality on site as well as in the area: • To mitigate dust during plant construction, an industry recognized chemical andlor water may be applied to internal roads and Weld County Road 27 as needed. • There are no significant odors associated with a natural gas compressor facility. • Emissions arc regulated and enforced by the Colorado Department of Public Health and Environment and the EPA. Both entities are responsible for regulating air quality and greenhouse gas emissions, and for protecting the public from hazardous air pollutants. The applicant will be required to obtain an air permit from the State of Colorado that illustrates compliance on all requirements. • The applicant will be required to demonstrate ongoing compliance to the State of Colorado. Noise: Noise impacts from the facility will be reduced by enclosing equipment within buildings and providing acoustical insulation. Noise generated by this facility will not exceed the residential noise standards listed in the County Code. Noise modeling is currently underway, and the final document will be provided to the County once completed. Map: Nearest Homesites to Proposed Compressor Station Site Location 811012018 - D \PRCJECTSThONGMONTE1955161200-195515-18D02GIS\MXD\SEVERANCE COMPRESSOR STATION DISTANCE FROM NE GHBORING -IDME SITES MAP VIXD - R"DER.PFDDICK GOALBANK INVESTMENT PARTNERS, S, LLG Project No H.5516-181197 Legend Local Maintained Weld County Roads State Highway Proposed Compressor Station Parcel ProposedCompressor Station Access Neighboring Home Site Locations A pproxirnatley 1,50[3' Approxirnatley 2,090' From Site TETRA TECH www.tetratech_ cc m 1'00 3. Suntie: St. eel, Ste 1-E Longnont, Co orado 3[}501 IL PHONE: 1303) 77;2-5262 FAX {303) 772-703;k Approximatloy 1.70D° From Site Approximatley 2,700' F rorn Site 41'a�ii ST,HWY•14 WINDSOR COMPRESSOR STATION WELD COUNTY, COLORADO NEIGHBORING HOME SITES NEARST TO THE PROPOSED SEVERENCE COMPRESSOR STATION SITE Appraximatley 2,O!I[J' From Site Lae: AU aUSr 10, 2018 Designed By: RJR: Figure No. 5. What are the hours and days of operation? (e.g. Monday thru Friday 8:00 a.m. to 5:00 p.m.) The Compressor facility and laydown yard will operate 24 hours a day, 7 days a week, 365 days a year; however, the facility is unmanned. Unless there is an operational requirement, employees will generally visit the site between the hours of 7:00 a.m. and 5:00 p.m. 6. List the number of full time and/or part time employees proposed to work at this site. The facility will be unmanned. One employee will visit the site one to two times per day as needed. 7. If shift work is proposed include the number of employees per shift. Shift work is not proposed for this project 8. List the number of people who will use this site. Include contractors, truck drivers, customers, volunteers, etc. During construction there will be between 25-30 personnel (contractors/day) for 4-6 months until construction is complete. Once the site is operational it is estimated that there will be between 2-5 people per day accessing the site. This includes large trucks and operators visiting site as needed for maintenance. 9. If this is a dairy, livestock confinement operation, kennel, etc., list the number and type of animals. Not applicable as this proposed site is not a dairy 10. Describe the type of lot surface and the square footage of each type (e.g. asphalt, gravel, landscaping, dirt, grass, buildings). The proposed compressor facility is roughly a 15 -acre footprint. Within this footprint, the equipment will be located on a 5 -6 -acre pad. Gravel will cover the pad and the proposed laydown yard arca. The compression units will be enclosed in buildings. The facility will also include a Concx container or small building to store spare parts and material storage and a small motor control center building. 11. How many parking spaces are proposed? How many handicapped (ADA) parking spaces are proposed? This is not a manned facility, so no designated parking spaces are proposed. As employees visit the site, they will park near the equipment that they are at the site to service. 12. Explain the existing and proposed landscaping for the site. The greater parcel is currently planted in alfalfa however the water rights are in the process of being severed from the parcel, so it will soon be vacant native dryland pasture area. Existing trees and a large approximately 10 -foot high berm along the Pierce Lateral Ditch to the north of the site help screen the facility from surrounding property owners. Between submittal and the first hearing, the applicants will be meeting with adjacent property owners which have direct views of the proposed facility area to determine their concerns, if any, with the application as is with no proposed Landscaping. If at that time the property owners have concerns with the proposal as it has been submitted, visual mitigation plans will be submitted to the planning department that have first been vetted with the property owners adjacent to the facility. 13. Describe the type of fence proposed for the site (e.g. 6 -foot chain link with earth tone slats). A 6 -foot chain link security fence will surround the approximately 15 -acre compressor site. A cattle guard and swing gate will be installed on the site entrance road proposed off CR 27. 14. Describe the proposed screening for all parking and outdoor storage areas. If the site is located in a floodplain outdoor storage is restricted. laydown yard is proposed on the lot. No screening is proposed because the site is over 1,500 feet away from the nearest residential property. The Coalbank Creek Floodplain runs over the southwest corner of the parcel but is 800 feet west of the proposed site location on the parcel. The floodplain will only affect the proposed access to the site off CR 27 not the proposed compressor facility or laydown yard itself. 15. Explain any proposed reclamation procedures when termination of the Use by Special Review activity occurs. When the Severance Compressor Station is no longer needed, the equipment will be removed from the property and the site will be reclaimed with native grassland vegetation. The decommissioning plan for the facility is as follows: In the event operations cease at this site and the facility is abandoned or removed from service or operation, the operator, their affiliates or successors will remove the equipment and all its components. Where possible, materials will be reused or recycled. Where required, waste materials for disposal will be removed by a licensed contractor and transported to a disposal site. The operator will comply with all COGCC regulations concerning site restoration. The operator will grade and revegetate the site to pre -development conditions, or in accordance with the lease termination provisions, or in accordance with the landowner's request. Best Management Practices for erosion control, revegetation, and stormwatcr management will be followed as outlined in the Stormwater ManagementPlan. 16. Who will provide fire protection to the site? This site is in the Ault -Pierce Fire Rescue District. A meeting was held with the Fire Protection District prior to submitting the application. 17. List all proposed on -site and off -site improvements associated with the use (e.g. landscaping, fencing, buildings, drainage, turn lanes, etc.) and a timeline of when you will have each one of the improvements completed. Following approval of the USR, the facility will be constructed within 5-6 months and will include the access road into the site; the equipment at the facility; the security fence around the facility, and all the required drainage improvements (channels, culverts and detention pond) . Engineering Questions 1. Describe how many roundtrips/days are expected for each vehicle type: Passenger Cars/Pickups, Tandem Trucks, Semi-Truck/Trailer/RV (Roundtrip = 1 trip in and 1 trip out of site). During the construction phase of this project, up to four semi -trucks may come to the site on a given day along with between 25-30 passenger vehicles/work trucks. When the site is operational, up to two Semi - trucks may come to the site on a given day along with up to three passenger vehicles/work trucks. 2. Describe the expected travel routes for site traffic. Main Travel Route: From State Highway 14 from the cast or west, then traveling north on County Road 27 to the site. The alternate travel route is from County Road 84 from the east or west and then traveling south on County Road 27 to the site. 3. Describe the travel distribution along the routes (e.g. 50% of traffic will come from the north, 20% from the south, 30% from the east, etc.) It is anticipated that 80 percent of the traffic will come from State Highway 14, with 40 percent from the traffic coming from westbound traffic and 40 percent coming from eastbound traffic. Twenty percent of the traffic will come from County Road 84; 10 percent from the eastbound traffic and 10 percent from the westbound traffic. 4. Describe the time of day that you expect the highest traffic volumes from above. It is anticipated that the highest traffic volumes to and from the site will be in the morning hours (7:00 a.m. to 10:00 a.m.) . 5. Describe where the access to the site is planned. The site access is proposed to be off WCR 27 to the west of the site approximately 1,340 feet south of the intersection of County Road 27 and County Road 84. The access was planned across from an existing access at a point where the floodplain is least impacted. 6. Drainage Design: Detention pond summarized in a drainage report is required unless the project falls under an exception to stormwater detention requirements per code section 23-12-30 F.1. A. Does your site qualify for an exception to stormwatcr detention? This site does not qualify for an exception to stormwater detention. B. Does your site require a stormwater detention pond? stormwater detention pond is required per section 23-12-30 of the Weld County Code. A drainage report has been included in the application materials and has been prepared by a Colorado Licensed Professional Engineer. The report adheres to the drainage related sections of the Weld County Code. It will be stamped and signed following approval of the report by Weld County. Environmental Health Questions 1. What is the drinking water source on the property? This Compressor station is an unmanned site and no permanent water supply is proposed. All workers constructing or accessing the site for maintenance and operational needs will have access to bottled water services. However, once the construction phase of the project is complete there will be no employee on site for regular operational duties, for more than 1-3 hours at a time. 2. What type of sewage disposal system is on the property? The site is an unmanned facility and will not have a permanent septic system or sewer tap on site. The site is proposing portable toilets to be provided on -site for the 1-2 employees who may visit the site each day. This is consistent with the Department of Public Health and Environment's portable toilet policy. 3. If storage or warehousing is proposed, what type of items will be stored? The laydown yard will be used to stage oil and gas pipes or equipment until they are ready to be installed at this or other NWC Development, LLC or subsidiary company facilities in the area. 4. Describe where and how storage and/or stockpile of wastes, chemicals, and/or petroleum will occur on this site. There will be a 400-600 bbl tank that will provide temporary storage for water until it needs to be removed. There will also be 500 gallons of triethylene glycol (TEG), 500 gallons of Methanol, 1,500 gallons of lube oil and 1,500 gallons of engine coolant stored on location. All storage tanks will have secondary containment. 5. If there will be fuel storage on site indicate the gallons and the secondary containment. State the number of tanks and gallons per tank. There will be no fuel storage at this site. 6. If there will be washing of vehicles or equipment on site indicate how the wash water will be contained. Vehicles and equipment will not be washed at this site. 7. if there will be floor drains indicate how the fluids will be contained. There will be no floor drains on the site. 8. Indicate if there will be any air emissions. (e.g. painting, oil storage, etc.) This is a facility that handles natural gas and there will be some air emissions. The applicant will obtain all necessary APENs for use of this facility from the CDPHE. 9. Provide a design and operations plan if applicable. (e.g. composting, landfills, etc.) Not applicable 10. Provide a nuisance management plan if applicable. (e.g. dairies, feedlots, etc.) Not applicable 11. Additional information may be requested depending on type of land use requested. If additional information is needed, please advise and it will be provided. Building Questions 1. List the type, size (square footage), and number of existing and proposed structures. Show and label all existing and proposed structures on the USR drawing. Label the use of the building and the square footage. STRUCTURE NUMBER DESCRIPTION OF EQUIPMENT SQUARE FOOTAGE EQUIPMENT OF FOOTPRINT 01 Gas Compressor 7044/) GK4 800 square feet 02 Gas Compressor 704,4/.16-K4 800 square feet 03 Gas Compressor 7044/J GK4 800 square feet 04 Gas Compressor 7044/i GIC4 800 square feet 05 Gas Compressor 7044/) GK4 800 square feet 06 Gas Compressor 7044/JGK4 800 square feet 07 Discharge Coalescing Filter 50 square feet 08 Enclosed Combustor 25 square feet 09 15 square feet BTEX Liquid Pump 10 Condensate Injection Pump 20 square feet 11 HP Flare Knockout Pump 15 square feet 12 LP Flare Knockout Pump 15 square feet 13 Pig Launcher 500 square feet 14 Pig Receiver 500 square feet 15 Glycol Regen Skid 800 square feet 16 BTEX Skid 250 square feet 17 IA Skid 200 square feet 18 FG Skid 200 square feet 19 Glycol Contactor 250 square feet 20 115 square feet Water Storage Tank 21 Slug Catcher 675 square feet 22 3 Phase Separator 250 square feet 23 400 square feet Condensate Storage Tank 24 HP Flare Knockout 250 square feet 25 LP Flare Knockout 250 square feet 26 Discharge Gas Meter 75 square feet 27 Pipe Rack N/A 28 MCC Building 600 square feet 29 Connex/Warehouse 500 square feet 300 square feet 30 Temporary Construction Trailer 2. Explain how the existing structures will be used for this USE? There are no existing structures on site. 3. List the proposed use(s) of each existing and proposed structure. See the chart in question 1 "description of use" column for the proposed buildings. Each building is represented on the Preliminary USR map attached to this application. Picture looking a arameemoralis- - r � i<< = . .7' .. —Cr,�ia • --M•• .t . .• b. P- tre•it �.'iitne4 rA a T- • a L 1 l . V ' - ,' s 4 i ^ '. ; :mow I )Yom: 4 . • e'fy3A' sYfl'-N�,•r• - Wit r� �+ a ierce Lateral ditch berm rth of the proposed site looking northwest .a • L^ _ d^r 1 d • IIY r. _ i .1 fiil, NI t*' .II '� r 1 I'll la z iw I • L cP • .• !a.( : te 1 Picture looking East at the proposed site location taken from County Road 27 l I 1 I. I • 1 I t II R•� _ �•i I ' r - i• f�tl it Y • 1 P1 ., I It i O( 4t , tl , 1 i v II • • - , - II,,1I -.',e ' r� " ''i' a-, �•' "• ✓ . ' t.'• • n lki. Y -r ra _ _ t F '.. 1 it.- N. 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Picture taken from the south of the pierce lateral ditch Ewa 1 r It el r •'la I I .yY 'I • .x.. iiat, ti I dr y j=4 » \ yy f I, 0 r 1 I h. 4 4m 1 • f 4 5 '71 \.• • ' A I � I �- 1 • .1 .• I L " rl Notice of Inquiry Development within a Coordinated Planning Agreement or Intergovernmental Agreement (CPA or i A) Boundary Date of inquiry 6/28/2018 - Municipality with CPA or !GA Ault CPA Name of Person Inquiring Anne Johnson Property Owner c NCL Investments LLC Planner Kim Ogle kogleweldgov,com Legal Description Lot 0 RECX17-Co 1. , part NW4 8-7-66 i'arceT&iITifther 0707-08-2-00- 017 Nearest Intersection CR 27 and CR 8 _ - - --- Type of Inquiry Special Use Permit fora natural gas compressor station The above person inquired about developing a property inside your designated CPA or ISA boundary. This person has been referred to community by Weld County Planning to discuss development options on this site. Visit Chapter 19 of the field County Code for specifics on your agreement. Weld County Comments Proposed Facility is within the Coordinated Planning Agreement Area, does the Town want to require annexation, a pre -annexation agreement or release for processing by Weld County Name, Title of Municipality Representative , Sharon Sullivan, Town Clerk/Treasurer municipality Comments It is understood that the four compressors will be in a building and that there will be a screening of the lighting, used only when someone on -site. Therefore the Town has no issues and will not require annexation. Kim olgl signed ,► klm Ogre e Dsttlol9 Signature of Weld County Planner Si gatia, ature of Municipality Representative Pine return the signed form to: Weld County Planning Department 1555 N jrph Avenue, Greeley, Co 80632 (970) 353-6100 x3540 v. (970)304-6498 fax Notice of Inquiry Development_ within a Coordinated Planning Agreement or Intergovernmental Agreement (CPA or IGA) Boundary Date of Inquiry 6/28/2018 Municipality with CPA or IGA Severance CPA Name of Person Inquiring Anne Johnson Property Owner NCL investments Lik Planner Kiln Ogle kogle@weldgov.,com Legal Description Lot D REC 1 0012, part NW4 8-7-66 Parcel Number 0707-08-2-00-017 - Nearest Intersection CR 27 and CR 84 Type of inlluiry Special Use Permit for a natural gas compressor i station The above person inquired about developing a property inside your designated CPA or ISA boundary4 This person has been referred to community by Weld County Punning to discuss development options on thissite. Visit chapter 39 of the Weld County Code for specifics on your agreement. Weld County Comments Proposed Facility is within the Coordinated Planning Agreement Area, does the Town want to require annexation, a pre -annexation agreement or release for processing by Weld County Nan e/Title of Municipality Representative t F t 4•E -Let -r- O r---! Municipality Comments totia o> t ratia TA 1iri Lintlp LA L--` CIra... e "To "sr flaS 4rfQ; t'(ata r t'J L a L-- t Fr c ss 1- Nut A'-- a r Kim Ogle Digitally signed by Kim Ogle Date:20111,06.28 09:25:39-C6'Mt' 0,7X/ Signature of Weld County Planner Signature of Municipality Representative Prase return the signed form to: Weld County Planning Department 1555 N 17th Avenue, Greeley, CO 80631 (970) 353-6100 x3540 (970)304-64_98 fax Weld County Public Works Dept.. 1111 H Street P.O. Box 758 Greeley, CO 80632 Phone; (970)304-6496 Fax: (970)304-6497 Property Owner Name Kevin Bailey Company 0aIb3r�E nvestment Partners, LLC Address 5956 herr Lane, Suite 825 City Dallas state TX zip 75225 Phone 405-479-8412 Fax E-mail . ile @rimro kenergy co►n Parcel Location The access is on WCR 27 Nearest Intersection: WCII2 & WCR 84 Dist. from Intersection (approx. in fk.L 1, 4O' ParcelNumber(s)0707-08-2-00-017 Section/Township/RangeAccess Sec 8, T7N, R ' Total # of Existing Accesses to parcel Ditch Proposed Use c Temporary (Tracking Pad Required) :jilt u Small Commercial .i-i D Large Com marcial (# ❑ industrfal ( t u Field (Agriculture Only) (W iyi Subdivision III) Is this access associated with a Planning or Building Department Process? USR/iviLISR n RECX/SUBX o PUD ❑ WOGLA ❑ COMPLEX (IA required) Planning/Building Department case It Not Assigned Yf! U Other ACCESS PERMIT APPLICATION FORM Authorized A ent `A licant (if different from Owner) Name Anne Johnson or Ryder Reddick Company any Tetra Tech Address 1560 Broadway, Suite 1400 itDenver state O zip 80202 Phone Anne 720-204-0173 Ryder 720-864-4603 E-mail An ne.Johnson@tetratech.com Ryder, Reddick @Tekratech.com Existing County Road Surface Information Asphalt Gravel ir Treated Other Proposed cce s In �rmati n Culvert Size , Fype (15'CMP/RCP min.) [Materials used to construct access Access Construction Start Date TBD Access Construction Finish Date TBD u Single ResidentialJ#1 Oil 8.1,Gas #) I Required Attached Documents - Traffic Control Plan (a generic plan can be found at https://www,weldgov.comidepartments h'ubliTc works 't ermits During the review process it may be determined that a right-of-way use permit will be required as well. - Certificate of Insurance (with"Weld County, Colorado" listed as the certificate holder & as an additional insu red) iAccess Pictures (from the left, right, into & out of the access — N., S1 E, & W) Access Authorization Form (Not required if the application is signed by the landowner.) Fee schedule (to be determined by permitting agency) - $75 each access point: Temporary, Small Commercial, Oil & Gas, Single Family Residential - $150 each access point: Industrial, Large Commercial, Subdivisions - Field (Agriculture only): no cost Parcel Sketch (or provide an aerial on an add'] sheet) A = F mot_ nr, �'ti�_re t- Proposed Access VVCR 84 N AProposed ComprossetSlet:iorn Access- Point Appromarery 1,340 scut al County Road 84 (Saa Dalall Map ancJ photos Aueched Ia app&G llo) State Hwy 14 Description of Work or Reason for Permit The site is a 120 Acre Lot D a6 Recorded Exemption REC 17-OOi . The new owners of the parcel are in the process of applying for a USR for a compressor station on this site and need Access from the West on County Road 27 for the for the compressor station. There is wetland in the proposed access area and floodplain, so the option proposed is located across from an existing farm access for the adjacent parcel to the west, should meet County spacing requirements and will allow access route to go around wetland area. By accepting this permit, the undersigned Property Owner/Authorized Agent, under penalty of perjury, verifies they have received all pages of the permit application; they have read and understand all the permit requirements and provisions set forth on all pages, By virtue of their signature the Property Owner/Authorized Agent is bound by and agrees to comply with all, said permit requirements and provisions, all Weld County ordinances, and state laws regarding access construction. Signature Panted Name Kevin Bailey Date 0,3/4 Signature Printed Name Date (In case of multiple Property Owners/Authorized Agents) Access Permits are good for 1 year from the date of issuance. Property Owner/Authorized Agent must obtain a new permit or request an extension if the construction of the access point is not completed in that timefr'ame, Extensions are subject to approval by Public Works County regulations on road access can be found in Article V of Chapter 12 of the Weld County Code. a a W w >- cC w U) w O O 2 a to C Co U) w O 0 w O z cC w W a 52 C C tO cc 115 Le, iN C CO Lr) a 2 co z C F- O w C a COALBANK INVESTMENT PARTNERS, LLC Project No.: 200-195516-18002 -- - Legend Local Maintained Weld County Roads Proposed Compressor Station Parcel f � Proposed Compressor Station Access h TETRA TEC www.tetratech.com 1900 S. Sunset Street, Ste. 1-E Longmont, Colorado 80501 PHONE: (303) 772-5282 FAX: (303) 772-7039 300 600 SEVERANCE COMPRESSOR STATION WELD COUNTY, COLORADO SEVERENCE COMPRESSOR STATION SITE PROPOSED COUNTY ROAD 27 ACCESS Date: AUGUST 10. 2018 Designed By: RJR Figure No. I J Proposed Compressor Station Access Looking East into the Parcel • elf -P1141.11:7415.; Itraljelr7 Are* .> "may.! ,■ ., r..a is `fir T__S. a —. f L� c �� • ► 9 a• l la a ✓ Mt a. 1' • I �'� ► �. y y sea k e ar� 1. .tar _ et 4,96g. IC I ices `pit - r °En. - • tee . • LriP 1 • _ raw a • - - • •I. Id '��i5 '--a� In�� v S 1': a a��. a e.�ab _-'. �■+;c. ax .:�, Ir. Y'C'.' I -i h '�i gt ti--'7,444.--2-r-3.7 T _ �w- _ ice`_ ---r _ _ = _ _ '�af+ •'! -^� nom: - ..' - F�■'" . ' , a -- 4. t a; M}t .. .. c� 1 ~ -L tat. i c -v f4 a �a v. f s r r -A M • 1n� - '! - - ,. ,. -ti ' ►' • _ E!v• - ..ate ;�e 1; '. • - 'f.i. _..R. •J:-- ; _ 4„._-,-- • a 4. 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'4•�ll� _ _ _ - 24.a Ma - Y F = - aa C +Y, ~ :tharalaT .c t;t1j:—.▪ ice- _ �• .„,••••-••• ,�Si•s _ ,; � ■ ti � 41 _ _� - L� aif -taa• _r�r • sJP • Atilt • - a sic ilit•- - a e T. • a e a- .t '~ I sler 4 far •-S moo a e re. tatlir .z -rya jw4- �" `` ,k. - -- • - _J�.� • in ,� e Proposed Compressor Station Access Looking Southeast of the Proposed Access at the proposed compressor site area. ' .- 1 'P r 1._ a ,aar.a•/ -. !_3 1 'S. 'ea •t ea,AS 4 Or3 e ■ a. INEr" f _c i•. _ _ _�+, rL_arr�w ,: aa;. s.'.' _nom � � • . _ a 3 �� • r - ..' Ma ffi• •IL iar .• P it -I ialliSr ase 3 ar M -r.:: ': a - }iF +-- 'd3 i t- ,� R Y y+ea lie C .1 ■t . - "L3 • r .-- n ssrtiClifry _ t L tom. r. ram- ate n- a E •_a ` -an tea,. _�. 10. r`C . d Y- + a optia�� a _ r S _ i _' !ter trw.rtsati s+ laa � .it'd.:;.:-�� _- _ �.- - alir _b -+ � ` - T !.e Tr a - an- ail r • !� ar - `• - _ _``E -- o• _ w t 111 a a t.a .a • f a. t 7 y tot 4 Auk_ alt F ■ a a • 3 a a puts _a r p Vim T1 a - S • 1" v a a . I al -a A n - ira. ar-t tsar , _ it = s a f . Proposed Compressor Station Access Looking South of the Proposed Access • a L • se` Y if or ✓ _ � • S , . 4.; t 4 L v it �I, "r ` ► : ..4y. • a .- Eke" MIL y -• 1 � a •i-pa -11 J ' . e _a it lilt a:. ■ ;. d ake ✓ f4 l . •',: s C .. fift tt r • jilt= W. Ws - f Proposed Compressor Station Access Looking West of the Proposed Access w ;sr -- • l r Irt Jr as Proposed Compressor Station Access Looking North of the Proposed Access Mr _. I AterR J4N I Proposed Compressor Station Access Looking Northeast of the Proposed Access t L♦ • -!• tL M1 - a_: Ls:1-Is_ t - - -,._.� •.� : • • -_ {4 r �, J.. fi�lf - i! - i Alla\' J _- {: _ - -r :St:14-4 _ • r� 1 IL- —% • '. .. - ' ea --1!T :--a>' _ r • ._ > i - - i 4 - Ti h.�1F.P ' li rya - _ J ... T `.•4 '�- f'f F. • • e ..i _. - .,- ~,,-_^I i• _ .11� 1i.,'11� _h y"Llit r � b=�+,��`r_ s_F ='tr AI �s am,•ti s eut 1.-� 7 Tamis l. �• a . v. '- _ ter► A. a'�' ti`�4 ", 1i ��,i is3 _ ; r - • y=am, •k „� - i • -- '4%. - % - s 1 �Q z , r • s 1a r r4 _- r. 3 �:. l T ci air a •S a; !. 448 a •� a • — ay` ty a - •a II �- per. i' <l *r vs as - ••l L▪ 1 � - It --al•gi - • ^� e • . r �' RJ a, -a.• a - u4ft filtraSk flitz d. e a . �.. talbti . t r.I Document must be filed electronically. Paper documents are not accepted. Fees &. forms are subj ect to change. For more information or toprint copies of filed documents, visit www.sos.state.co.us. Colorado Secretary of State Date and Time: 06/05/2018 02:05 PM ID Number: 20181458228 Document number: 201 1458228 Amount Paid: $50.00 ABOVE SPACE FOR OFFICE USE ONLY Articles of Organization filed pursuant to § 7-90-301 and § 7-80-204 of the Colorado Revised Statutes ('C4RS.) 1. The domestic entity name of the limited liability company is Coalbank Investment Partners, LLC (The name of a limited liability company must contain the term or abbreviation "limited liability company", "ltd. liability company", "limited liability co.", "ltd. liability co.", "limited", "I.l.c.", "llc", or "ltd.". See §7-90-601, C.R.S.) (Caution: The use of certain terms or abbreviations are restricted by law. Read instructions for more information.) 2. The principal office address of the limited liability company's initial principal office is Street address 1675 Broadway Mailing address (Street number and name) Suite 2075 Denver CO 80202 (City) (State) (ZIP/Postal Code) United States (Province — if applicable) (Country) (leave blank if same as street address) (Street number and name or Post Office Box information) (City) (State) (ZIP/Postal Code) a (Province — if applicable) (Country) 3. The registered agent name and registered agent address of the limited liability company's initial registered agent are Name (if an individual) al or (if an entity) The Corporation Company (Caution: Do not provide both an individual and an entity name.) Street address 7700 East Arapahoe Rd Mailing address (leave blank if same as street address) (Street number and name or Post Office Box information) (Middle) (Suffix) (Street number and name) Centennial (City) CO 80112 (State) (ZIP Code) ARTORCGLLC Page 1 of 3 Rev. 12/01/2012 (Last) (First) or (The following statement is adopted by marking the box.) K (City) Co (State) The person appointed as registered agent has consented to being so appointed. (ZIP Code) 4. The true name and mailing address of the person forming the limited liability company are Name (if an individual) or (if an entity) (Caution: Do not provide both an Mailing address (Last) NWC Development, LLC (First) (Middle) (suffix) individual and an entity name.) 1675 Broadway (Street number and name or Post Office Box information) Suite 2075 Denver (City) Co (Province — if applicable) CO 80202 (State) (ZIP/Postal Code) United States . (Country) (:lf the following statement applies, adopt the statement by marking the box and include an attachment.) The limited liability company has one or more additional persons forming the limited liability company and the name and mailing address of each such person are stated in an attachment. 5. The management of the limited liability company is vested in (Mark the applicable box. one or more managers. the members. 6. (The following statement is adopted by marking the box.) There is at least one member of the limited liability company. 7. (If the following statement applies, adopt the statement hv marking the box and include an attachment.) This document contains additional information as provided. by law. 8. (Caution: Leave blank if the document does not have a delayed effective date. Stating a delayed effective date has significant legal consequences. Read instructions before entering a date.) (If the following statement applies, adopt the statement by entering a date and, if applicable. time using the required format.) The delayed effective date and, if applicable, time of this document. is/are (mmiddfyyyy hour:minute a Notice: Causing this document to be delivered to the Secretary of State for filing shall constitute the affirmation or acknowledgment of each individual causing such delivery, under penalties of perjury, that the document is the individual's act and deed, or that the individual in good faith believes the document is the act and deed of the person on whose behalf the individual is causing the document to be delivered for filing, taken in conformity with the requirements of part 3 of article 90 of title 7, C.R.S., the constituent documents, and the organic statutes, and that the individual in good faith believes the facts stated in the document are true and the document complies with the requirements of that Part, the constituent documents, and the organic statutes. ARTORGLL1 Page 2 of 3 Rev. 12/01/2012 This perjury notice applies to each individual who causes this document to be delivered to the Secretary of State, whether or not such individual is named in the document as one who has caused it to be delivered. 9. The true name and mailing address of the individual caushig the document to be delivered for filing are cl i nton (Last) 1675 Broadway bran michael ch ael (f-. irst (Middle) (Suffix) (Street number and name or Post Office Box information) Denver CO 80202 (City) (Province it a pplicable) (State) (ZIP/Postal Code) United States . (Country) (If the following statement applies, adopt the statement by marking the box and include an attachment.) This document contains the true name and mailing address of one or more additional individuals causing the document to be delivered for filing. Disclaimer: This form/cover sheet, and any related instructions, are not intended to provide legal, business or tax advice, and are furnished without representation or warranty. While this form/cover sheet is believed to satisfy minimum legal requirements as of its revision date, compliance with applicable law, as the same may be amended from time to time, remains the responsibility of the user of this form/cover sheet. Questions should be addressed to the user's legal, business or tax advisor(s). ARTORGLLC Page 3 of 3 Rev. 12/01/2012 OFFICE OF THE SECRETARY OF STATE OF THE STATE OF COLORADO CERTIFICATE OF FACT OF GOOD STANDING I, Wayne W. Williams, as the Secretary of State of the State of Colorado, hereby certify that, according to the records of this office, Coalbank Investment Partners, LLC is a Limited Liability Company formed or registered on 06/05/2018 under the law of Colorado, has complied with all applicable requirements of this office, and is in good standing with this office. This entity has been assigned entity identification number 2018145 8228 . This certificate reflects facts established or disclosed by docu lents delivered to this office on paper through 08/08/2018 that have been posted, and by documents delivered to this office electronically through 08/10/2018 @ 10:02:00 I have affixed hereto the Great Seal of the State of Colorado and duly generated, executed, and issued this official certificate at Denver, Colorado on 08/10/2018 @ 10:02:00 in accordance with applicable law. This certificate is assigned Confirmation Number 11056147 Secretary of State of the State of Colorado *********************************************End of Certificate******************************************* Notice: A certificate issued electronically from the Colorado Secretary of State's Web site is fully and immediately valid and efj�ective. However, as an option, the issuance and validity of a certificate obtained electronically may be established by visiting the Validate a Certificate page of the Secretary of State's Web site, http://www.sos.state.co.usibiziCertificateSearchCriteria.do entering the certificate's confirmation number displayed on the certificate, and following the instructions displayed. Confirming the issuance of a certificate is merely optional and is not necessary to the valid and effective issuance of a certificate. For more information, visit our Web site, http:// www.sos.state.co.usl click "Businesses, trademarks, trade names" and select "Frequently Asked Questions." OFFICE OF THE SECRETARY OF STATE OF THE STATE OF COLORADO CERTIFICATE OF FACT OF GOOD STANDING I, Wayne W. Williams, as the Secretary of State of the State of Colorado, hereby certify that, according to the records of this office, NWC Development, LLC is a Limited Liability Company formed or registered on 10/27/2017 under the law of Colorado, has complied with all applicable requirements of this office, and is in good standing with this office. This entity has been assigned entity identification number 20171812746 . This certificate reflects facts established or disclosed by docu lents delivered to this office on paper through 07/09/2018 that have been posted, and by documents delivered to this office electronically through 07/12/2018 @ 12:18:22 . I have affixed hereto the Great Seal of the State of Colorado and duly generated, executed, and issued this official certificate at Denver, Colorado on 07/12/2018 @ 12:18:22 in accordance with applicable law. This certificate is assigned Confirmation Number 11002635 . Secretary of State of the State of Colorado *********************************************End of Certificate******************************************* Notice: A certificate issued electronically from the Colorado Secretary of State's Web site is fully and immediately valid and efj�ective. However, as an option, the issuance and validity of a certificate obtained electronically may be established by visiting the Validate a Certificate page of the Secretary of State's Web site, http:/lwww.sos.state.co.us/biz'CertificateSearchCriteria.do entering the certificate's confirmation number displayed on the certificate, and following the instructions displayed. Confirming the issuance of a certificate is merely optional and is not necessary to the valid and effective issuance of a certificate. For more information, visit our Web site, http:// www.sos.state.co.usl click "Businesses, trademarks, trade names" and select "Frequently Asked Questions." Document must be filed electronically. Paper documents are not accepted. Fees & forms are subject to change. For more information or to print copies of filed documents, visit www.sos.stat.e.co.us. !-F t d Colorado Secretary of State Date and Time: 10/27/2017 02:51 PM ID Number: 20171 12746 Document number: 20171 12746 Amount Paid: $50.00 ABOVE SPACE FOR OFFICE USE ONLY Articles of Organization filed pursuant to § 7-80-203 and § 7-80-204 of the Colorado Revised Statutes (C.RsS:s) 1. The domestic entity name of the limited liability company is NWC Development, LLC (he name of a limited liability company mustcontain the term or abbreviation "limited liability company", "ltd. liability company ", "limited liability en.", "ltd. liability CO.", "limited", " i e. ", „lk ", or "ltd. ". See §7-90-601, C.Q.S.) (Caution: fhe use of certain terms or abbreviations are restricted by law. Read instructions for more information.) 2. The principal office address of the limited liability company's initial principal office is Street address 5956 Sherry Lane Mailing address (Street number and name) Suite 825 Dallas TX 75225 (City) (State) (ZIP/Postal Code) United States (Province — if applicable) (Country) (leave blank if same as street address) (Street number and name or Post Office Box information) (City) (State) (ZIP/Postal Code) (Province — if applicable) (Country) 3. The registered agent name and registered agent address of the limited liability company's initial registered agent are N arise (if an individual) or (if an entity (Last) (First) (Middle) (Suffix) The Corporation Company (Caution: Do not provide both an individual and an entity name.) Street address 7700 East Arapahoe Road Mailing address (leave blank if same as street address) (Street number and name) Suite 220 Centennial co80112-1268 (City) (State) (ZIP Code) (Street number and name or Post Office Box information) ARTORCGLLC Page 1 of 3 Rev. 12/01/2012 (The following statement is adopted by marking the box.) Vt (City) Co (State) The person appointed as registered agent has consented to being so appointed. (ZIP Code) 4. The true name and mailing address of the person forming the limited liability company are Name (if an individual) or (If an entity) Rimrock Energy Partners, LLC (Caution: Do not provide both an individual and an entity name.) Mailing address 5956 Sherry Lane (Street number and name or Post Office Box information) Suite 825 Dallas TX 75225 (City) (Middle) (Suffix) (State) (ZIP/Postal Code) United States (Province — if applicable) (Country) (If the following statement applies, adopt the statement by marking the box and include an attachment.) The limited liability company has one or more additional persons forming the limited liability company and the name and mailing address of each such person are stated in an attachment. 5. The management of the limited liability company is vested in (Mark the applicable box.) one or more managers. or the members. 6. (The following statement is adopted by marking the box.) There is at least one member of the limited liability company. I 7. (If the following statement applies, adopt the statement by marking the box and include an attachment.) This document contains additional information as provided by law. 8. (Caution: Leave blank if the document does not have a delayed effective date. Stating a delayed effective date has significant legal consequences. Read instructions before entering a date.) (1f the following statement applies, adopt the statement by entering a date and, if applicable, time using the required format.) The delayed effective date and, if applicable, time of this document is/are (mm/ddf yyyy hour: minute a m/pm) Notice: Causing this document to be delivered to the Secretary of State for filing shall constitute the affirmation or acknowledgment of each individual causing such delivery, wider penalties of perjury, that the document is the individual's act and deed, or that the individual in good faith believes the document is the act and deed of the person on whose behalf the individual is causing the document to be delivered for filing, taken in conformity with the requirements of part 3 of article 90 of title 7, C.R.S., the constituent documents, and the organic statutes, and that the individual in good faith believes the facts stated in the document are true and the document complies with the requirements of that Part, the constituent documents, and the organic statutes. ARTORGLL1 Page 2 of 3 Rev. 12/01/2012 (Last) (First) This perjury notice applies to each individual who causes this document to be delivered to the Secretary of State, whether or not such individual is named in the document as one who has caused it to be delivered. 9. The true name and mailing address of the individual causing the document to be delivered for filing are Bodine Tanner Hammack (Last) (First) (Middle) (Suffix) 2300 Trammell Crow Center (Street number and name or Post Office Box information) 2001 Ross Avenue Dallas (City) (Province — if applicable) TX 75201 (State) (ZIP/Postal Code) United States (Country) (If the following statement applies, adopt the statement by marking the box and include an attachment.) This document contains the true name and mailing address of one or more additional individuals causing the document to be delivered for filing. Disclaimer: This form/cover sheet, and any related instructions, are not intended to provide legal, business or tax advice, and are furnished without representation or warranty. While this form/cover sheet is believed to satisfy minimum legal requirements as of its revision date, compliance with applicable law, as the same may be amended from time to time, remains the responsibility of the user of this form/cover sheet. Questions should be addressed to the user's legal, business or tax advisor(s). ARTORGLLC Page 3 of 3 Rev. 12/01/2012 PRELIMINARY DRAINAGE REPORT FOR SEVERANCE GAS COMPRESSOR FACILITY WELD COUNTY, COLORADO Prepared for: 4Fir Coalbank Investments, LLC 5956 Sherry Lane, Suite 825 Dallas, Texas, 75225 Prepared by: Tetra Tech, Inc. 1900 South Sunset Street, Suite 1-E Longmont, CO 80501 Tetra Tech Job No. 200-195516-18002 August 2018 - TETRA TECH TABLE OF CONTENTS Page 1.0 INTRODUCTION 2 2.0 GENERAL LOCATION AND DESCRIPTION 2 2.1 Location 2 2.2 Description of Property 2 3.0 DRAINAGE BASINS AND SUB -BASINS 3 3.1 Major Basin Description 3 3.2 Historic Drainage Patterns 3 3.3 Offsite Drainage Patterns 3 4.0 DRAINAGE DESIGN CRITERIA 4 5.0 DRAINAGE FACILITY DESIGN 5 5.1 General Concept 5 5.2 Onsite Drainage 5 5.3 Water Quality and Detention 5 5.4 Drainage Infrastructure Maintenance 7 6.0 CONCLUSION 7 7.0 REFERENCES S LIST OF APPENDICES Appendix A Figures Appendix A-1 Appendix A-2 Appendix A-3 Appendix A-4 Appendix A-5 Appendix B Site Data Appendix B-1 Appendix B-2 Appendix B-3 Appendix 13-4 Appendix B-5 Appendix B-6 Vicinity Map Historic Drainage Plan Offsite Drainage Plan Developed Drainage Plan Drawings FEMA FIRM Map NRCS Site Soil Survey Report NOAA Site Rainfall Data Historic Runoff Calculations Offsite Runoff Calculations Developed Runoff Calculations Appendix C Hydraulic Calculations Appendix C-1 Appendix C-2 Appendix C-3 Appendix C-4 Pipe and Culvert Sizing Calculations Drainage Channel Sizing Calculations Drainage Calculations Detention Pond Design Preliminary Drainage Report Severance Gas Processing Plant 1 August 2018 ''Att.local\TER'\Projeats ' I\Lcngmont\195516\200-195516-1S002''Oocs'\.Reportsl.Drainage Report''Drainage Report Severance.docx 1.0 INTRODUCTION The purpose of this report is to present the proposed storm drainage improvements at Co alb ank Investments, LLC Severance Gas Compressor Facility. Typical development of any site will introduce impervious elements to the basin. Impervious material within a basin will increase peak stormwater runoff compared with runoff from existing conditions. This report examines the undeveloped flow patterns of offsite and onsite drainage basins and the proposed stormwater facilities designed to mitigate the downstream impact of increased stormwater runoff. The contents of this report are prepared, at a minimum, in accordance with the Weld County Engineering and Construction Criteria and the Urban Storm Drainage Criteria Manual, Volumes 1, 2, and 3 for a Preliminary Drainage Report. 2.0 GENERAL LOCATION AND DESCRIPTION 2.1 Location The Severance Gas Compressor Facility site is located on parcel (No. 070708200017) located on the east side of Weld County Road. (WCR) 27, approximately one -tenth mile south of W Highway 4 in Weld County, Colorado. More specifically, the site is in the northwest 1/4 quarter of Section 8, Township 7 North, Range 66 West of the 6th Principal Meridian, in Weld County. A vicinity map is provided in Appendix A-1. 2.2 Description of Property The proposed development is a Compressor Facility for the pressurizing and repumping of natural gas. Related equipment and structures to be incorporated in the development of the site include metering equipment and compressors for the custody transfer of gas, natural gas liquids and condensate. An electrical substation will also be developed as part of this project. The site is currently undeveloped and is owned by Coalbank Investment Partners LLC. The total acreage associated with ownership is 120 -acres +1-. Actual proposed development will comprise of 11.01 -acres +/- of developed impervious area and 19.41 -acres +1- of total disturbed land. The development will be located in the southwest portion of the parcel. Proposed land use is to be industrial. Existing topography within the parcel is comprised of mild slopes in a southeast direction toward State Highway 14. Vegetative cover is comprised of range grass with no trees, as shown in Figures 1 and 2. Throughout the basin, both onsite and offsite of the development, soils are classified using the Preliminary Drainage Report Severance Gas Processing Plant 2 August 2018 ''Att.local\TER'\Projeats \L.cngmont\195516\200-195 ►16-1 S002''Docs'\.Reports\.Drainage Report''Drainage Report Severance.docx National Resource Conservation Service - Hydrologic Soil Groups, which include Group A soils (low runoff potential when thoroughly wet) and Group B soils (moderate runoff potential when thoroughly wet). According to the Custom Soil Resource Report for Weld County, Colorado, Southern Part, the soils that make up the site include a wide range of sandy loam soils. The largest soil constituents are Kim loam and Otero sandy loam, ranging in slope from approximately 1 to 9 percent. A detailed soil survey report is provided in Appendix B-2. Soil types within the project site are predominantly hydrologic soil group A. The main drainage in the area that flows through the southwest portion of the site is a FEMA Floodplain Zone A. StreamStats version 4 predicts the flow rate across this portion of the site to be approximately XXX-cfs. . The offsite flow to the north of the development is approximately 5 8.5 8 cfs for the 100 year storm. 3.0 DRAINAGE BASINS AND SUB -BASINS 3.1 Major Basin Description The proposed property is in rural Weld County and is surrounded by rangeland and agricultural land. Proposed development is in a Zone X, Area of Minimal Flood Hazard. The site is in Flood Insurance Rate Map (FIRM), Community Panel No. 08123 C 1225E, attached to this report as Appendix B-1. 3.2 Historic Drainage Patterns The historic drainage patterns of the proposed development drain from the north to the south. At the south property line, the flows enter a shallow swale and flow westerly to be collected in the WSSC canal. 3.3 Offsite Drainage Patterns The project site includes X offsite drainage basins. These basins will be collected by a proposed ditch at the north boundary of the development and directed to the WSSC canal at the southern boundary of the property. The basin contributing to the FEMA Zone A, upstream of the project site, comprises an area of 155 acres. This flow may cross the entrance road from WCR 27. Runoff that enters the site from the FEMA Zone A eventually reaches a confluence with a WSSC canal on the property. Peak flows for the 5 -year and 100 -year storm events for the offsite drainage basins are provided in the following table. Peak Flow Peak Corresponding Flow Acres 5 Year (cfs) 100 Year (cfs) POA Basin ID OS -1 OS -2 OS -3 OS -4 94.67 48.16 11.98 13.81 1.10 0.27 0.11 0.60 Table 1 Offsite Peak Flow s 32.64 13.90 3.90 8.15 A A A A Preliminary Drainage Report 3 August 2018 Severance Gas Processing Plant \Att.local\TER'\Projects''L.cngmont\195516\200-195►16-1S002''Oocs'\.Reportsl.Drainage Report''Drainage Report Severance.docx Drainage swale and culverts along the perimeter of the site are designed to convey offsite flows, that would normally cross the site, around the development so as not to allow mingling with on -site drainage. The offsite drainage plan is attached to this report as Appendix A-3, respectively. 4.0 DRAINAGE DESIGN CRITERIA This report is prepared in compliance with the Weld County Engineering and Construction Criteria and the Urban Storm Drainage Criteria Manual, Volumes 1, 2, and 3. Within the proposed development, the 100 -year storm is used as the major storm event when evaluating existing and proposed drainage facilities. The 100 -year storm is used because flooding from a storm of this magnitude could cause considerable damage to equipment if adequate stormwater controls were not sized for this magnitude of a storm. Previous drainage studies have not been found for this area. This is most likely a result of the site being in a rural environment. Runoff Calculations: The Colorado Urban Hydrograph procedure was used to analyze the runoff from drainage basins that are larger than 160 acres. The Rational Method was used in stormwater runoff calculations for drainage basins that were less than 160 acres. Time of concentration calculations for individual basins, using the Rational Method, were estimated using the methods detailed within Urban Storm Drainage Criteria Manual, Volume 1, Ch. 6. Rainfall Data: Site rainfall depth information was obtained from the National Oceanic and Atmospheric Administration (NOAA) Atlas 14, Volume 8, Version 2, Precipitation -Frequency Atlas of the United States (2013) as well as NOAA's Hydroreteorological Design Studies Center's Precipitation Frequency Data Server. Rainfall data for the proposed site was acquired from the Nunn Rainfall Station (05-6023) located at a Latitude of 40.7064" and Longitude -104.7833°. Utilizing data from the Nunn Station, point rainfall data was developed as well as the intensity -duration -frequency (IDF) curve. Rainfall data is presented in Appendix B-3. Culvert Sizing: Culverts are to be designed under internal roadways. Culverts onsite will be evaluated using information within the FHWA Hydraulic Design Series Number 5, Hydraulic Design of Highway Culverts. On -site culverts will be designed to convey the 100 -year storm event. Culvert sizes will be determined using Bentley CulvertMaster version 3.3 software. Culvert sizing calculations will be provided in Appendix C-1. Drainage Channel Sizing: Offsite drainage channels are proposed along the perimeter of the proposed development. These channels have been sized for the 100 -year storm event using Manning's Equation. Detailed channel calculations are provided in Appendix C-2. Turf Reinforcement Mat (TRM) or Erosion Control Blanket (ECB) is recommended in all vegetated drainage channels. ROLLMAX VMax SC250 TRM, or approved equal, and North American Green RollMax S150 ECB, or approved equal, is recommended. Riprap will be placed at all culvert outfalls, and has been sized according to the Urban Drainage Flood Control District Manual, Volume 2. A drainage calculation summary describing drainage channel, culvert properties, and rip -rap calculations is provided in Appendix C-3. Detention Pond Sizing: The detention pond volumes have been determined using the UDFCD's Detention Design — UD-Detention v3.07 spreadsheet. Water Quality Pond Sizing: Water quality ponds are required prior to releasing stormwater runoff from the development. Water that is stored will be tested, analyzed, and reported in accordance to the Preliminary Drainage Report 4 August 2018 Severance Gas Processing Plant \Att.local\TER'\Projects''L.cngmont\195516\200-195►16-1S002''Oocs'\.Reports\.Drainage Report''Drainage Report Severance.docx CDPHE stormwater permit. WQCV was determined using the UDFCD Detention Design — UD- Detention v3.07 spreadsheet. 5.0 DRAINAGE FACILITY DESIGN 5.1 General Concept Onsite runoff will be detained in one detention pond onsite and discharged on the south side of the site towards the historic discharge point for the site. The peak runoff for the historic condition was calculated for the area that drains to the detention pond to determine the allowable release rate for the detention pond. The combined outflow from the detention pond will not exceed the 5 -year historic flow rate for the area that drains to the detention pond. 5.2 On site Drainage The proposed development was divided into one drainage basin that drains to the detention pond onsite. The discharge location from the detention pond has been designed so that the runoff drains to the historic drainage point located on the south side of the site. The 5 -year combined release from the detention pond will not exceed the allowable release rate. The following table provides the peak flow rates for the historic drainage basin that drains to the location of the proposed detention pond. Peak Flow Peak 100 Year Flow Acres 5 Year (cfs) (cfs) Basin ID POA A 13.54 0.10 4.89 Table 2 Historic Peak Flows Drainage Basin A-1 includes the entire site. Drainage Channels A-1 and A-2 convey runoff from the offsite basins in the north to south of the developed area. Detention Pond A is in the southern part of the developed portion of the site, and will drain to Drainage Channel A-1. See Appendix A-4 Developed Drainage Plan. The following table provides the peak flow rates for the onsite drainage basin. Table 3 Onsite Drainage Basin Peak Flow Peak Flow Peak Flow Corresponding Acres 5 Year (cfs) 100 Year (cfs) POA Basin ID A-1 13.65 7.10 28.82 A 5.3 Water Quality and Detention Onsite runoff will be conveyed within drainage ditches and culverts to the onsite detention pond. There is one proposed detention pond onsite. Detention Pond A is designed to detain the 100 -year developed storm event from Drainage Basins A. A minimum of one foot of freeboard will be provided for the detention pond for the 100 -year storm event. The required Water Quality Control Volume (WQCV) will be contained within the detention volume for the detention pond. Outflow from the detention pond will discharge through a water quality feature. The water quality feature for the box is an outlet structure box with orifice holes to slow the drain time of the detention pond to allow sediment to settle before the water is discharged from the detention pond. Preliminary Drainage Report 5 August 2018 Severance Gas Processing Plant \Att.local\TER'\Projects''L.cngmont\195516\200-195►16-1S002''Oocs'\.Reportsl.Drainage Report''Drainage Report Severance.docx The pond has a 12" diameter outlet pipe. The outlet pipe on the pond will be restricted using a metal plate that is attached to the outlet box to cover a portion of the outlet pipe. The restrictor plate elevation is set at a specific elevation to control the release rate of the detention pond. The restrictor plate elevation has been set so that the sum of the peak release rate from the pond does not exceed the 5 -year historic flow rate in accordance with Weld County Engineering and Construction Criteria. Design calculations for the outlet pipe are presented in Appendix C-4. Erosion control measures, such as rip -rap, will be provided at all culvert and swale outlets to protect against erosion. Detention pond calculations are presented in Appendix C-4. The following table presents a summary of information pertaining to the detention pond onsite. Table 4 Detention Pond Summary Pond A Drainage Area (acres) 13.54 % Impervious ofDrainage Area 35 Tiny ofConcentration (minutes) 19.3 Water Quality Capture Vo lu ine (ac -fl) 0.164 Water Surface Elevation (feet) 5038.37 100 Year Water Surface Elevation (feet) 5040.68 Top of Detention Pond Elevation (feet) 4.7 Release Rate fromPond Po nd (cfs) 0.4 Total Storage (ac -ft) 1.583 *Note: Preliminary values to be updated. In summary, the onsite detention pond is sized to accommodate 100 -year runoff volumes from the newly developed drainage basin. Stormwater discharge from the detention pond is designed to not exceed the 5 -year historic runoff rate in accordance with the City of Greeley Design Criteria and Construction Specifications. The release rate from the detention pond will be achieved using a flow restriction plate on the detention pond discharge pipe so that combined release rate from the detention pond does not exceed the 5 -year historic runoff rate. The detention pond will discharge to the historic drainage way located along the southwestern portion of the site. The proposed detention pond will comply with the following criteria: 1. Runoff must be sampled, tested and reported in compliance with CDPHE stormwater permit requirements. 2. Runoff will be released in a location to restore the historic flow patterns that existed prior to the construction of the Pierce Lateral 3. Runoff for the 100 -year storm will be released at the 5 -year pre -project rate. Drain time for the pond was evaluated using the UDFCD detention pond worksheets. Colorado drainage law requires the discharge of 99% of all runoff from all storm events in 120 hours. Preliminary Drainage Report 6 August 2015 Severance Gas Processing Plant \Att.local\TER'\Projects''L.cngmont\195516\200-195►16-1S002''Oocs'\.Reportsl.Drainage Report''Drainage Report Severance.docx 5.4 Drainage Infrastructure Maintenance Satisfactory operation of onsite drainage components requires scheduled maintenance throughout the life of the site. The following are recommendations for maintenance and inspection that are drawn from the Southeast Metro Stormwater Authority (SEMSWA) in Denver, Colorado. • Onsite personnel should be tasked with developing a schedule that reminds them to evaluate all drainage components onsite. • Routinely (monthly basis) inspect ditches, ponds, culverts, outlet structures, riprap, etc. to ensure locations are free from debris and excess vegetation. ■ Ensure riprap, culverts, and outlet structures are not compromised. Repair if needed. ■ Frequency of inspection may need to be more frequent in the first year or two as the site is established. Facilities should be inspected following any storm event. • When mowing, collect clippings and all other trimmings and take offsite for disposal or dispose with trash onsite; do not leave in the pond or ditch. • Remove vegetation adjacent to outlet works that may interfere with operation; note if noxious weeds are present and notify supervisor to schedule treatment/removal. • During inspection, report damage/compromise to side slopes, pond banks, inlet pipe, trickle channels, outlet structure. Prepare a repair schedule and complete repairs. • It is important to limit use of fertilizers and pesticides in and around the ponds and ditches to minimize entry into pond and subsequent downstream waters. • For detention pond, every 6 months or so, the accumulated sediment should be removed from the bottom of the outlet structure and the pond depth checked at several points. If the depth of the accumulated sediment is greater than 25 percent of the original design depth, sediment should be removed. Accumulated sediment, over time, will reduce the capacity of the pond and may cause site flooding if not maintained. A typical checklist for operators to use during inspections is as follows: • Has trash accumulated within the ponds and ditches? • Evaluate vegetative cover to ensure it does not compromise ditch or pond area. • Is there evidence of erosion or instability on pond and ditch slopes? • Is there any sedimentation within the pond, in ditches, and in culverts? • Is there any settling and/or cracking in bermed d areas? • Are there any upstream or downstream conditions that could impact drainage? Depending on the evaluation, discrepancies should be addressed and fixed as soon as possible. Neglecting repairs may compromise drainage through the site. 6.0 CONCLUSION This report was prepared in compliance with the Weld County Engineering and Construction Criteria and the Urban Storm Drainage Criteria Manual, Volumes 1, 2, and 3. The proposed drainage system for the improvements to the Severance Gas Processing Plant site will provide detention for the developed section of the site, releasing flows from the site at the 5 -year historic rate. Releases are as near to the points of design as practical and are not expected to increase adverse impacts on downstream property owners. This Final Drainage Report is being submitted to the Weld County for review and approval. Preliminary Drainage Report 7 August 2018 Severance Gas Processing Plant \Att.local\TER'\Projects''L.cngmont\195516\200-195►16-1S002''Oocs'\.Reportsl.Drainage Report''Drainage Report Severance.docx 7.0 REFERENCES Weld County Engineering and Construction Criteria, April 2012. Federal Emergency Management Agency, Flood Insurance Rate Map Weld County, CO, Panel 920 of 2250, January 2016. United States Department of Agriculture National Resources Conservation Service. Custom Soil Resource Report for Weld County, Colorado, Southern Part. Urban Drainage and Flood Control District. Urban Storm Drainage Criteria Manual, Volume 1- I , March 2017. NOAA Atlas 14, Volume 8. Precipitation -Frequency Atlas of the United States. U.S. Department of Commerce, 2013. Preliminary Drainage Report 8 August 2018 Severance Gas Processing Plant \\tt.iocaiVIER \Project\Lon&mont"195516\200-195516-18 2 Docs\.ReporssOra inage RepoftDrainage Report Severance. d.oc.x APPENDIX A - FIGURES APPENDIX A- 1 VICiNITY MAP U) C O 2 2 W LY_ W 2 O I UJ U 2 W CL W IEL W tL d 2 N C C3 03 r r C3 I717) 4i') 0) r -a - H 2 C 2 C J ..r U) H C) w C 0 a on C� N CN REP Project No.: 200-195516-1802 TETRA TECH www.tetratech.com 1900 S. Sunset Street, Ste. 1-E Longmont, Colorado 80501 PHONE: (303) 772-5282 FAX: (303) 772-7039 SERVERANCE COMPRESSOR STATION WELD COUNTY, COLORADO VICINITY MAP Date: JUL 26, 2018 Designed By: JJA Figure No. 1 APPENDIX A-2 HISTORIC DRAINAGE PLAN REFER TO ATTACHED MAPS APPENDIX A-3 OFFSITE DRAINAGE PLAN REFER TO ATTACHED MAPS APPENDIX A-4 DEVELOPED DRAINAGE PLAN REFER TO ATTACHED MAPS APPENDIX A -S DRAWINGS REFER To ATTACHED MAPS APPENDIX B - SITE DATA APPENDIX B-1 FEMA FIRM MAP REFER TO ATTACHED MAPS APPENDIX B-2 NRCS SITE SOIL SURVEY REPORT USDA United States aTha. Department of Agriculture \RCS Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Weld County, Colorado, Southern Part July 26, 2018 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nres.usda.gav/wps/ portal/nres/main/soils/health/} and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center https://offices.sc.egov.usda.gov/locator/app?agency=arcs) or your N RCS State Soil Scientist (h ttp ://www. n res .0 sd a. g ov/wps/portal/arcs/d etai I /soils/conta ctu s/? cid=nrcs142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the N RCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.G. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface 2 How Soil Surveys Are Made 5 Soil Map 8 Soil Map 9 Legend 10 Map Unit Legend 11 Map Unit Descriptions 11 Weld County, Colorado, Southern Part 13 4—Aquolls and Aquepts, flooded 13 24 —Fort Collins loam, 0 to 3 percent slopes 14 31 Kim loam, 0 to 1 percent slopes 16 32 Kim loam, 1 to 3 percent slopes 17 47 Olney fine sandy loam, 1 to 3 percent slopes 18 48 —Olney fine sandy loam, 3 to 5 percent slopes 19 53 —Otero sandy loam, 5 to 9 percent slopes 20 References 22 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil -vegetation -landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 Custom Soil Resource Report scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil -landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil -landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field -observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and 6 Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8 Custom Soil Resource Report MAP LEGEND Area of Interest (AOI) Area of Interest (AOI) Soils O Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features fipi Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot ,etri n' e• °A V 0• $¢ '1 reel a 'a Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 16, Oct 10, 2017 Soil map units are labeled (as space allows) for map scales 1:60,000 or larger. Date(s) aerial images were photographed: Mar 20, 2016 —Oct 16, 2016 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. 10 Custom Soil Resource Report Map Unit Legend Map Unit Symbol Map Unit Name Acres in Aol Percent of AOI 4 Aquolls and Aquepts, flooded 6.4 2.7% 24 Fort slopes Collins loam, 0 to 3 percent 1.5 0.6% 31 Kim loam, 0 to 1 percent slopes 7.4 3.1% 32 Kim loam, 1 to 3 percent slopes 164.1 68.8% 47 Olney fine sandy percent slopes loam, 1 to 3 0.2 0.1% 48 Olney fine sandy percent slopes loam, 3 to 5 24.5 10.3% 53 Otero sandy loam, percent slopes 5 to 9 34.5 14A% Totals for Area of Interest 238.7 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it 11 Custom Soil Resource Report was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha -Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 12 Custom Soil Resource Report Weld County, Colorado, Southern Part 4—Aquolls and Aquepts, flooded Map Unit Setting National map unit symbol: 3621 Elevation: 3,600 to 4,700 feet Mean annual precipitation: 12 to 16 inches Mean annual air temperature: 50 to 55 degrees F Frost -free period: 100 to 165 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map UnitComposition Aquolls and similar soils: 55 percent Aquepts, flooded, and similar soils: 25 percent Minor components: 20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Aquolls Setting Landform: Depressions, drainageways, plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile Hal - 0 to 8 inches: variable H2 - 8 to 60 inches: stratified sandy loam to clay Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): Moderately low to high (0.06 to 6.00 inlhr) Depth to water table: About 6 to 36 inches Frequency of flooding: Frequent Frequency of ponding: None Calcium carbonate, maximum in profile: 10 percent Salinity, maximum in profile: Moderately saline to strongly saline (8.0 to 16.0 mmhoslcm) Sodium adsorption ratio, maximum in profile: 5.0 Available water storage in profile: Low (about 4.7 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: Salt Meadow (R067BY035CO) Hydric soil rating: Yes 13 Custom Soil Resource Report Description of Aquepts, Flooded Setting Landform: Stream terraces Down -slope shape: Linear Across -slope shape: Linear Parent material: Recent alluvium Typical profile HI - 0 to 8 inches: variable H2 - 8 to 60 inches: stratified sandy loam to clay Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): Moderately low to high (0.06 to 6.00 inlhr) Depth to water table: About 6 to 36 inches Frequency of flooding: Frequent Frequency of ponding: None Calcium carbonate, maximum in profile: 10 percent Salinity, maximum in profile: Moderately saline to strongly saline (8.0 to 16.0 mmhoslcm) Sodium adsorption ratio, maximum in profile: 5.0 Available water storage in profile: Low (about 4.7 inches) Interpretive groups Land capability classification (irrigated): 6w Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: Wet Meadow (R067BY038CO) Hydric soil rating: Yes Minor Components Thedalund Percent of map unit: 10 percent Hydric soil rating: No Haverson Percent of map unit: 10 percent Hydric soil rating: No 24 Fort Collins loam, o to 3 percent slopes Map Unit Setting National map unit symbol: 2tl nc Elevation: 4,020 to 6,730 feet 14 Custom Soil Resource Report Mean annual precipitation: 14 to 16 inches Mean annual air temperature: 46 to 48 degrees F Frost -free period: 143 to 154 days Farmland classification: Prime farmland if irrigated Map Unit Composition Fort collins and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Fort Collins Setting Landform: Interfluves Down -slope shape: Linear Across -slope shape: Linear Parent material: Pleistocene or older alluvium derived from igneous, metamorphic and sedimentary rock and/or eolian deposits Typical profile Ap - 0 to 4 inches: loam Btl - 4 to 9 inches: clay loam Bt2 - 9 to 16 inches: clay loam Bk f - 16 to 29 inches: loam Bk2 - 29 to 80 inches: loam Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 12 percent Salinity, maximum in profile: Nonsaline (0.1 to 1.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 0.5 Available water storage in profile: High (about 9.1 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 4c Hydrologic Soil Group: C Ecological site: Loamy Plains (R067BY002CO) Hydric soil rating: No Minor Components Nunn Percent of map unit: 10 percent Landform: Terraces Landform position (three-dimensional): Tread Down -slope shape: Linear Across -slope shape: Linear Ecological site: Loamy Plains (R067BY002CO) 15 Custom Soil Resource Report Hydric soil rating: No Vona Percent of map unit: 5 percent Landform: Interfluves Landform position (two-dimensional): Backslope, footsiope Landform position (three-dimensional): Side slope, base slope Down -slope shape: Linear Across -slope shape: Linear Ecological site: Sandy Plains (R067BY024CO) Hydric soil rating: No 1 Kim loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 3629 Elevation: 4,900 to 5,250 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 46 to 52 degrees F Frost -free period: 125 to 150 days Farmland classification: Prime farmland if irrigated Map Unit Composition Kim and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Kim Setting Landform: Alluvial fans, plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Mixed eolian deposits derived from sedimentary rock Typical profile HI - 0 to 12 inches: loam H2 - 12 to 42 inches: loam H3 - 42 to 60 inches: fine sandy loam Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 5.95 inlhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent 16 Custom Soil Resource Report Available water storage in profile: High (about 9.0 inches) Interpretive groups Land capability classification (irrigated): 3e Hydrologic Soil Group: A Ecological site: Loamy Plains (R067BY002CO) Hydric soil rating: No Minor Components Otero Percent of map unit: 10 percent Hydric soil rating: No 2 Kim loam, 'I to 3 percent slopes Map Unit Setting National map unit symbol: 362b Elevation: 4,900 to 5,250 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 46 to 52 degrees F Frost -free period: 125 to 150 days Farmland classification: Prime farmland if irrigated Map UnitComposition Kim and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transacts of the mapunit. Description of Kim Setting Landform: Alluvial fans, plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Mixed eolian deposits derived from sedimentary rock Typical profile H1 - 0 to 12 inches: loam H2 - 12 to 40 inches: loam H3 - 40 to 60 inches: fine sandy loam Properties and qualities Slope: 1 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 5.95 inlhr) Depth to water table: More than 80 inches Frequency of flooding: None Custom Soil Resource Report Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Available water storage in profile: Moderate (about 9.0 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: Loamy Plains (R067BY002CO) Hydric soil rating: No Minor Components Otero Percent of map unit: 10 percent Hydric soil rating: No 47 Olney fine sandy loam, 'I to 3 percent slopes Map Unit Setting National map unit symbol: 362v Elevation: 4,600 to 5,200 feet Mean annual precipitation: 11 to 15 inches Mean annual air temperature: 46 to 54 degrees F Frost -free period: 125 to 175 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Olney and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Olney Setting Landform: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Mixed deposit outwash Typical profile HI - 0 to 10 inches: fine sandy loam H2 - 10 to 20 inches: sandy clay loam H3 - 20 to 25 inches: sandy clay loam H4 - 25 to 60 inches: fine sandy loam Properties and qualities Slope: 1 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Custom Soil Resource Report Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 2.00 inlhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhoslcm) Available water storage in profile: Moderate (about 7.0 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4c Hydrologic Soil Group: B Ecological site: Sandy Plains (R067BY024CO) Hydric soil rating: No Minor Components Zigweid Percent of map unit: 10 percent Hydric soil rating: No Vona Percent of map unit: 5 percent Hydric soil rating: No 48 Olney fine sandy loam, 3 to 5 percent slopes Map Unit Setting National map unit symbol: 362w Elevation: 4,600 to 5,200 feet Mean annual precipitation: 11 to 15 inches Mean annual air temperature: 46 to 54 degrees F Frost -free period: 125 to 175 days Farmland classification: Farmland of statewide importance Map Unit Composition Olney and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Olney Setting Landform: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Mixed deposit outwash Custom Soil Resource Report Typical profile HI - 0 to 10 inches: fine sandy loam H2 - 10 to 20 inches: sandy clay loam H3 - 20 to 25 inches: sandy clay loam H4 - 25 to 60 inches: fine sandy loam Properties and qualities Slope: 3 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 2.00 inlhr) Depth to water table: More than 80 inches Fre que ncy of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhoslcm) Available water storage in profile: Moderate (about 7.0 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4c Hydrologic Soil Group: B Ecological site: Sandy Plains (R067BY024CO) Hydric soil rating: No Minor Components Zigweid Percent of map unit: 9 percent Hydric soil rating: No Vona Percent of map unit: 6 percent Hydric soil rating: No 53 Otero sandy loam, 5 to 9 percent slopes Map Unit Setting National map unit symbol: 3632 Elevation: 4,700 to 5,250 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 48 to 52 degrees F Frost -free period: 130 to 180 days Farmland classification: Not prime farmland Map Unit Composition Otero and similar soils: 85 percent Custom Soil Resource Report Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Otero Setting Landform: Plains Down -slope shape: Linear Across -slope shape: Linear Parent material: Eolian deposits and/or mixed outwash Typical profile H1 - 0 to 12 inches: sandy loam H2 - 12 to 60 inches: fine sandy loam Properties and qualities Slope: 5 to 9 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 10 percent Salinity, maximum in profile: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water storage in profile: Moderate (about 7.7 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 6e Hydrologic Soil Group: A Ecological site: Sandy Plains (RO67BYO24CO) Hydric soil rating: No Minor Components Kim Percent of map unit: 10 percent Hydric soil rating: No Cushman Percent of map unit: 5 percent Hydric soil rating: No References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. BS -79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ n res/d etai I/n atio na I/so i l s/?cid =nres 142 p2_0542 62 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www. nres. usda.gov/wps/portal/nres/detail/national/soils/?cid=nres 142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http: // www.nres.usda.gov/wps/portal/nres/detail/national/soils!?cid=nres 142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcsidetailisoils/ home/?cid=nres 142p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/ detail/national/land use/rang epasture/?cid= stelprdbl 043084 22 Custom Soil Resource Report United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430 -VI. http://www.nres.usda.gov/wps/portal/ nres/d etai I/sails/sci entists/?cid =nres 142 p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nres.usda.gov/wps/portal/nres/detail/national/sails/? cid =nres 142 p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/InternetiFSE_DOCUMENTS/nrcs142p2 052290 . pdf 23 APPENDIX B-3 NOAA SITE RAINFALL DATA Precipitation Frequency Data Server Page 1 of 4 NOAA Atlas 14, Volume 8, Version 2 Location name: Ault, Colorado, USA* Latitude: 40.59 04°, Longitude: -104.804° Elevation: 50 55.0 5 ft** * source: ESRI Maps ** source: USGS POINT PRECIPITATION FREQUENCY ESTIMATES Sanja Perica, Deborah Martin, Sandra Pavlovic, Isha ni Roy, Michael St. Laurent, Carl Trypaluk, Dale Unruh, Michael Yekta, Geoffery Bonnin NOM, National Weather Service, Silver Spring, Maryland PF tabular I PF graphical I Maps & aerials PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1 Duration i 5 -min 10 -min 15 -min 30 -min 60 -min Average recurrence interval (years) 1 0.241 (0.193-0.298 0.352 (0.283-0.437 0.430 (0.345-0.533 0.585 (0.470 -0.725 0.719 (0.578-0.891 2-h r 0.853 (0.689-1.05) 3 -hr 6 -hr 12 -hr 24 -hr I 2 -day 3 -day I 4 -day 7 -day I 10 -day 20 -day 30 -day [45-day 60-day 0.924 (0.749-1.13) 1.05 (0.857-1.28) 1.25 (1.02-1.50) 1.50 (1.24-1.80) 1.72 (1.43-2.04) 1.88 (1.57-2.23) 2.01 (1.68-2.36) 2.27 (1.90-2.65) 2.50 (2.11-2.92) 3.24 (2.74-3.74) 3.82 (3.25-4.40) 4.51 (3.84-5.16) 5.04 (4.31-5.75) 2 0.290 (0.233-0.360) 0.425 (0.341-0.527) 0.519 (0.416-0.643) 0.704 (0.564-0.872) 0.866 (0.695-1.07) 1.03 (0.830-1.27) 1.11 (0.901-1.36) 1.28 (1.04-1.56) 1.50 (1.23-1.81) 1.75 (1.44-2.10) 2.02 (1.68-2.40) 2.19 (1.82-2.59) 2.32 (1.94-2.74) 2.67 (2.23-3.12) 2.96 (2.49-3.45) 3.77 (3.18-4.35) 4.40 (3.73-5.06) 5.17 (4.40-5.92) 5.80 (4.95-6.62) 5 0.386 (0.309-0.480) 0.566 (0.452-0.703) 0.690 (0.551 -0.858) 0.933 (0.746-1.16) 1.16 (0.923-1.44) 1.38 (1.11-1.70) 1.49 (1.20-1.83) 1.72 (1.40-2.10) 1.97 (1.60-2.38) 2.22 (1.82-2.66) 2.56 (2.11-3.04) 2.73 (2.27-3.24) 2.89 (2.40-3.41) 3.34 (2.79-3.92) 3.71 (3.11-4.34) 4.62 (3.89-5.35) 5.33 (4.51-6.14) 6.22 (5.28-7.14) 7.00 (5.96-8.00) 10 0.480 (0.381-0.599 0.703 (0.558-0.877 0.857 (0.680-1.07) 1.16 (0.920-1.45) 1.44 (1.14-1.80) 1.72 (1.38-2.13) 1.87 (1.50-2.30) 2.15 (1.73-2.63) 2.41 (1.95-2.92) 2.67 (2.18-3.21) 3.04 (2.50-3.63) 3.23 (2.66-3.84) 3.39 (2.80-4.02) 3.92 (3.25-4.61) 4.35 (3.62-5.10) 5.32 (4.46-6.19) 6.08 (5.12-7.04) 7.07 (5.97-8.14) 7.95 (6.73-9.12) 25 0.629 (0.489-0.835) 0.921 (0.717-1.22) 1.12 (0.874-1.49) 1.52 (1.18-2.02) 1.90 (1.48-2.53) L2.29 (1.80-3.02) r 2.48 (1.96-3.27) 2.82 (2.23-3.66) 3.09 (2.46-3.96) 3.36 (2.69-4.26) 3.77 (3.02-4.71) 3.97 (3.19-4.92) 4.15 (3.34-5.12) 4.74 (3.82-5.77) 5.22 (4.21-6.30) 6.27 (5.08-7.47) 7.09 (5.77-8.39) 8.19 (6.68-9.63) 9.19 (7.51-10.7) 50 0.760 (0.571-1.01) 100 0.905 (0.653-1.23) 200 1.07 (0.734-1.49) 500 1.30 (0.856-1.86 1.11 (0.837-1.48) 1.33 (0.957-1.80)i 1.56 (1.07-2.17) 1.91 (1.25-2.72) 1.36 (1.02-1.81) 1.84 (1.38-2.45) 2.31 (1.74-3.09) 1.62 (1.17-2.20) 2.19 (1.58-2.98) 2.77 (2.00-3.77) 1.91 (1.31-2.65) 2.59 (1.78-3.60) 3.28 (2.26-4.57) 2.33 (1.53-3.31) 3.17 (2.08-4.51) 4.03 (2.65-5.74) 2.79 3.35 3.98 4.90 (2.11-3.70) (2.44-4.53) (2.76-5.50) (3.25-6.92) 3.03 (2.31-4.01) 3.41 (2.61-4.45) 3.69 (2.84-4.75) 3.97 (3.08-5.06) 4.39 (3.42-5.52) 4.59 (3.59-5.74) 4.78 (3.75-5.95) 5.40 (4.25-6.64) 5.91 (4.65-7.20) 7.00 (5.55-8.43) 7.86 (6.26-9.42) 9.03 (7.22-10.7) 10.1 (8.10-12.0) 3.65 (2.67-4.92) 4.06 (2.99-5.41) 4.33 (3.21-5.70) 4.63 (3.46-6.03) 5.04 (3.79-6.48) 5.25 (3.97-6.71) 5.45 (4.13-6.93) 6.08 (4.63-7.64) 6.59 (5.03-8.21) 7.71 (5.92-9.49) 8.61 (6.65-10.5) 9.84 (7.63-12.0) 11.0 (8.53-13.3) (3. 4.34 03-5.98) (3. 4.79 37-6.51) (3. 5.05 58-6.79) (3. 5.36 84-7.14) 5.76 (4.15-7.57) 5.97 (4.33-7.80) 6.17 (4.49-8.03) 6.80 (4.96-8.73) 7.30 (5.35-9.31) 8.43 (6.23-10.6) 9.36 (6.95-11.7) 10.6 (7.94-13.2) 11.8 (8.85-14.6) (3. 5.36 58-7.54) (3. 5.84 93-8.12) (4. 6.08 13-8.35) (4. 6.42 41-8.74) (4. 6.76 68-9.10) (4. 6.99 87-9.35) 7.19 (5.03-9.57) 7.77 (5.46-10.2) 8.24 (5.81-10.8) 9.36 (6.67-12.1) 10.3 (7.39-13.2) 11.6 (8.38-14.8) 12.9 (9.29-16.3) 1000 1.50 (0.g49-2.13 2.19 (1.39-3.13) 2.68 (1.69-3.81) 3.65 (2.31-5.19) 4.66 (2.95-6.63) 5.67 (3.63-8.00) 6.21 (4.00-8.72) 6.71 (4.36-9.34) 6.92 (4.55-9.54) 7.28 (4.84-9.95) 7.58 (5.08-10.3) 7.81 (5.27-10.5) 8.01 (5.43-10.7) 8.53 (5.84-11.4) 8.95 (6.16-11.9) 10.1 (7.00-13.2) 11.0 (7.73-14.4) 12.4 (8.72-16.0) 13.6 (9.63-17.6) Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS). Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html`Plat=40.5904 .lon=-104.8040&da... 7/19/2018 Precipitation Frequency Data Server Page 2 of 4 IMF graphical PDS-based depth-duratson-frequency (DDF) curves Latitude 4059041,, Longitude: =104_x040'' c c E 0 in Precipitation depth (in) E 5 10 25 50 10O 200 NOAA Atla& 14. 'Mutne B. Ver.acn IC flrti Sr C i Duration >. >, tr— r13 ftll V 4 'is r,e ri 4 4 g0 +aIN fro n u'5 Average recurrence interval (years) wT 41171 T. T� T T7' IP"se 4_1 500 1000 Created Thu jul 19 21 Ai 14 2O1E Back to Top Average recurrence int Mai (years) 1 2 5 al CI 25 50 100 200 500 1000 Duration w z4nell 34inty 15 -4'n df n — 4 -day 7 -day 60 -inn i 10 -day 2-1v — 20 -day i-hr 6 -ht — 45 -ray 12 -her — 50 -day 24-hf ht :/Ihdsc n s,noa . ovihdsc/pfds/pfds_p►rin a e.htnnl?lat=40.5904&ion=- 104.8040&da... 7/19/2018 Precipitation Frequency Data Server Page 3 of 4 Maps & aerials Small scale terrain h & _ 3km Large scale terrain -. 1'I eCtra ea .14 1:57.) lAs et 74 CA I_Oni I I i wl I I I rams Lan IlIIIil� I • , -n- J a i" II f1 r I1e'p ell I€ 1 0 Greeley Dell er tir Large scale map For t C+�Ilr Longmont BcuIwler Denver 100km �-- 25 ht :/Ihdsc n s,noa . ov/hdsc/pfds/pfds_p►rin a e.htnnl?lat=40.5904&ton=- i 04.8040&da... 7/19/2018 Precipitation Frequency Data Server Page 4 of 4 Large scale aerial Back to Top US Department of Commerce Nationa Oceanic and Atmospheric Administration National Weather Service National Water Center 1325 East West Highway Silver Spring, MD 20910 Questions'?: H DSC.Q uesti ons t noaa .gov Disclaimer ht :/Ihdsc n s,noa . ovihdsc/pfds/pfds_p►rin a e.htnnl?lat=40.5904&ton=- i 04.8040&da... 7/19/2018 APPENDIX B-4 HISTORIC RUNOFF CALCULATIONS RE P Processing Development - Severance, CO Historic Runoff Calculations Basin Area Soil Type A Basin Area (acres) Soil Type B Soil Type C Soil Type D €;ravel Road (ac) Baxin imperviousness Roof/Tank (ad) Undeveloped (ae) [ U Runoff Coeficients, c 2 Yr 5 Yr 10 Yr t00 VT Ltatal (fl) Li (ft) Si (f(lfl) is (ft) Ss (fI,'fl) Ti (min) Tt (min) Te (min) Rainfall intensity i (I &lir) 2 Yr 5 Yr 10 Yr 100 Yr _ Basin Flom i) (c•fs) 2 Yr 5 Yr [0 Yr 100 Yr POA POA A 13.54 13.5 0.0 0.0 0.0 0.00 0.00 13.54 2.0 0.005 0.006 0.007 0.126 1666 50t) 0.014 1166 0.0021 39.5 Ito 57.6 0.90 1.21 1.50 2.88 0.06i 0.10 0.14 4.#39 A POA A 2.0 2 y 5tr l O yr 100 y r Soil Type A Soil Type H. Soil Type C Soil Type 17 C amposite: 13.54 0.00 0.00 0.00 100.01) 0.00°•11 0.00% 0.00'3 13.54 100% 0.01 0.01 0.01 0.01 0.01 0.01 0.05 0.05 0.01 0.B 007 a44 0.15 0.49 0.15 0.49 0.005 0.006 0.007 0,126 Site Imperviousness Tattle Undeveloped 2 1 -hour Point Rainfall Depth 2 Yr 5 Yr 10 Yr 100 Yr P 1 0.866 1.16 1.44 2,77 Notes: I. Refer to Table RC} -3 for Site impervicxlsnc,s_ Nislorie flow analysis = 2% imperviou,ncx,. 2. Refer to Urban Drainage Criteria 'Manual Vol. l Table RC) -5 for RunoffCoeflicients, C Euuatious• TI= Ti+ TI Ti = (0.395*(1.1-05)*Li^10.5) i Si"0.33 C5 =5 Yr Runoff Coefficient Li = 500 ft maximum Si = average waterecn,lnie slope i =(213.5*Pl)+'(l0+Tcp'0.7236 PI = 1 -hr paint rainfall depth Tc = time of enroll traction T1= (Li 500) 1 •• V = Cv'`5A0.5 C:v=Convey^ance Coefficient =7, short pasture, lawns (Table RC) 2) Sw = average walerenunce slope: =C;*1*A C = Runof'CoeFficien t 1= Rainfall In tensity A=Area tt.lncal'•,[ER\Pmjects'.Longmon.L\1955 16200-195516-181]02%ulpporll oes C,alesldrainag4•,Runoff_Scrverancc.xls APPENDIX B -S OFFSITE RUNOFF CALCULATIONS Severance Processing Facility Offsite Runoff Calculations Rash Hasini Area (acres) Basin Imperviousness Runoff Co cients, c 1.total Li Si Sw 'I'i 7't 'Pr Raintbll Intensity I (i:n;hr) Basin fOwsQ Ws) PO4 Area Soil T,}pe A Soil live 13 Soil Type C Soil I'ype D (;ravel Road (ac) Roof71'ank Inc) Asphalt (ac) Undeveloped Cu) 1 % 2 Yr 5 Yr 10 Z': 100 Yr (*) (ft (MO (ttfit) (miii) (in in) (min) 2 'CI 5 VI 1 (1 'f : 100 Y: 2 Yr 5 Yr 10 Yr 100 't t. OS -1 94.67 77.10 17.57 0.00 0.00 0.81 1.04 0.59 92.2 3.9 0.016 0.029 0.197 5386.9 300 0.027 0.017 24.53 92.61 117.14 0.55 0.73.0.11 1.75 0.70 1.10 2.54 32.64 OS -2 48A6 48.16 0.00 0.00 0.00 0.00 0.00 0.00 4#12 2.0 (09.(0(174 0.005 0.006 0.007 0.126 2396.3 300 0.017 0.010 28.91 51.10 80.01 0.72 0.916 1.19 2.30 0.18 0.27 0.40 13.90 A OS -3 11.92 11.98 0.00 0.0() 0.00 0.00 (1.00 0.10 11.9 2.8 0.008 (_009 0.011 0.132 2623.5 300 0.023 0.014 225.79 46.42 72.21 0.77 1.03. 1.28 2A7 0.07 0.11 0.17 190 % Combined 154.80 0.516 1,48 3.11 50.44 A O8-4 13.81 13.81 0.00 0.00 0.00 0.38 0.00 0.55 12.9 7.0 0.026 0.029 0.033 0.164 1209.3 300 0.050 0.022 19.70 21.29 40.99 1.12 150 1.87 3.59' 0.40 0.60 0.84 8.15 :t Basin O5-1 CN Values for IRIS Analysts Fnti:e v."ate:-shed ishe:'hac lus semi -Lid grassland(TR-55 p8- 2-8) Soil "Type A4 Soil 'I'y'pe 13 Soil Type C Soil Type 1) CN Composite: 77.10 1757 0.00 0.00 81.4494 18.56% 0-0094 0.00% 94.67 100'!•6 68 79 86 89 70 Basin OS -1 3.9 2 yr (101 (102 022 0.02 Syr 0.01 0.03 0.07 0.07 10 yr 100 yr Soil Type 77.10 81% Soil Type 13 17.57 19% Soil Type C: 0.00 0% Soil "I'ype D 0.00 0% 94_('6526 100% lodi iec.. 0;014 0,0116 0.02 0.09 0.16 0.16 0.029 0.14 0.44 0.50 0.50 0.197 Basin 0S-2 2.0 2 yr 0.01 0.01 0.01 0.01 Syr 0.01 0.01 0.05 0.05 10 yr 0.01 0.07 0.15 0.15 10(1yr Soil TypeA 48.116 I00% Soil Type 13 0.00 0% Soil Type 0.00 0% Soil Type D 0.00 0% 48.16 10(u Modified: 0.005 0.006 0.007 0.13 0.44 0.49 0.49 0.126 Basin 05-3 .8 2 yr 0.01 0.01 (1.0.2 (1.(12 5 yr •0.01 0.02 0.06 0.06 10yr 0.01 py 0.08 0.15 0.15 100 yr Soil ' I'ype A 1 1.S'E I 00% Soil'I'ype [3 0.00 0% Soil Type C: 0.00 0% Soil Type 1) 0.00 0% 11.98 100% Modified: 0.008 0.009 0.011 0.13 0.44 0.50 0.50 0,132 Basin 0S-4 7.0 2 yr Syr 0.03 0.05 0./0(9 0.09 10 yr 100 yr Soil • l'ype A Soil Type 13 Soil Type C Soil Type!) Modified: 13.81 0.00 000 0.00 13.81 100% T 15% men {/ JO 0.03 0.09y4(( 0,04 0.04 0.03 0.11 (118 0.18 0.16 0.46 031 0.51 0.1)26 0.02.9 0.033 0.164 Site liT en'iatmess'fable I. rideveloped 1 -hour Point Rainfall Depth 2Yr 5 Yr 10 Yr 100 Y: P1 0.866 1.16 1.44 2.77 Norm. 1. Rete:• to `fable RO-3 for Siw It perviouviess_ Nisnnric flow analysis 2% imperviousness. 2. Refer n) 12. -ban Drainage C :ice: is Manual Vol. 1 Table lW-5 io Runoff oeffieients. C Keuadons: 1'i It Ti (0.3954(1.1-C::5)+L.i"-(15): Si""0.33 CS 5Y.:Runoff Coefficient L. 300 ti_ maximum Si average watercourse slope It (Ltoral-Li)1 4` 4 C:v'S""0.5 C v Conveyance Coefficient (Table RO-2) Sw ave:'a≥e w•are'c0u:•5e slope (25.5.1'1 )/ (10 I'c)"0.766 I'1 1-hrpoInc rainfaII depth I'c time ofconeneaction Q (MIA C Run oilCoeffic iem I Rainfall Intensity A Area :'•rt Inc all 11. IL•:I'"_ o jects'•.Lon gmo(rtA1955161200-19551695516-1800 2%Suppo: d )oc s"C aIC5'..ckaitl age...R unoti_Se:ve: an ce. x Is APPENDIX B-6 DEVELOPED RUNOFF CALCULATIONS kV I1 I'rnce>viii 1}eielnpnlent-tiereranee. tit) Ik�dopol Rana ftCakulotsos RUM en.. Sara la nit < I!pul In' tel m.ur.. IOn,ll l.ul nu'le,r 11a.l1I "re itstaii whoop. IIa4r 6a.t' Meer ,111 rN l'11%. •Tpl y"4}ilIppt.{ mil RI: I. i.il l.1: :' i:il RI: II I:n.a l!... ra: I!..Y I. • 1 . :gLll I: .,. '.q _: I'. r `•r .1•r Ssr Ld.11iw, Inl/ A Iola Iinc.1.1 ILa.•r. }i Gon f 1-ili "tT 1kr Y+Ta '::aba ".r r .� r • ..• r ♦.1 1914 Q,.% 055 :.:1:1 :a:1 '.ti _ S..:, .. .. 1 .. :r'. :Lies MS :t! 1.ty -n ..:. .•r, •::* . •a ._ I: 'sir: -- I: I' ..1:.:SI: I: <iil 1.11.4 Ir141 .;• nierar ld n,: If;l,uiat tnieerst ler-Ill it•.d.11, 51t I1yn. 1•r a re ralir 1.1 nv rnnl IA.,toll Urpa, I' !P 1,44 2 y 3fa II,.r Neu •16�1:n1..e :Jodi I4: . +viI I.1':: :ail IS}: I' 4 4 all OM :. 4 :.': 0.15 !O4 :.•4 :.`1 III4 •}'t :5\'. Pa* CY! o�1 Ah., 014 t'R9 01,901 698M I. ItYlfbra` IaL.I. I!:.'tciit, Irl:y•i.. a:.e. t. Itpfr 1I tht.,i 111.110.: l.Im.I .1. 1 .1.1: 1! I. ` La IN i. fll'.: ffr:I: le, r tennttem:: 72 I e79p l I M,!1'1;- I E-Irl.in uitflll:n41 11 rut 1l11.rr I l!.i,1411 1,1:1 a1ir a W. Ol.•:d II I! 1•t..j::'e1:11) 111 : • }':}• : ...1'-0Iq;•I I.:e 141:e_14i141, IN• .rr �te u•1a:1. 11 APPENDIX C - HYDRAULIC CALCULATIONS APPENDIX C-1 PIPE AND CULVERT SIZING CALCULATIONS APPENDIX C-2 DRAINAGE CHANNEL SIZING CALCULATIONS Worksheet for Channel AA -I Project Description Friction Method Solve For Manning Formula Normal Depth Input Data Roughness Coefficient. Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge 0.035 0.00800 4.00 4.00 3.00 50.44 ft/ft ft/ft (H:V) ft/ft (H:V) ft ft3/s Results Normal Depth Flow Area Wetted Perimeter Hydraulic Radius Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type Subcritical 1.55 14.23 15.76 0.90 15.38 1.26 0.02006 3.55 0.20 1.74 0.65 ft ft2 ft ft ft ft ft/ft ft/s ft ft GVF Input Data Downstream Depth Length Number Of Steps 0.00 ft 0.00 ft 0 GVF Output Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope 0.00 ft 0.00 Infinity Infinity 1.55 1.26 0.00800 ft ft/s ft/s ft ft ft/ft 8/23/2018 5:17:31 PM Bentley Systems, Inc. Haestad Methods So Jn egfRi&aMaste r V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 2 Worksheet for Channel A -I GVF Output Data Critical Slope 0.02006 ft/ft Bentley Systems, Inc. Haestad Methods SoB1eitttectiRivwMaster V8i (SELECTseries 1) [08.11.01.03] 312312018 5:17:31 PM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 2 of 2 Channel A-2 Project Description Friction Method Solve For Manning Formula Normal Depth Input Data Roughness Coefficient. Channel Slope Left Side Slope Right Side Slope Bottom Width Discharge 0.035 0.03300 4.00 4.00 3.00 8.15 ft/ft ft/ft (H:V) ft/ft (H:V) ft ft3/s Results Normal Depth Flow Area Wetted Perimeter Hydraulic Radius Top Width Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow Type Supercritical 0.46 2.22 6.79 0.33 6.68 0.49 0.02590 3.66 0.21 0.67 1.12 ft ft2 ft ft ft ft ft/ft ft/s ft ft GVF Input Data Downstream Depth Length Number Of Steps 0.00 ft 0.00 ft 0 GVF Output Data Upstream Depth Profile Description Profile Headloss Downstream Velocity Upstream Velocity Normal Depth Critical Depth Channel Slope 0.00 ft 0.00 Infinity Infinity 0.46 0.49 0.03300 ft ft/s ft/s ft ft ft/ft 8/23/2018 5:19:27 PM Bentley Systems, Inc. Haestad Methods So Jn egfRi&aMaste r V8i (SELECTseries 1) [08.11.01.03] 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 2 Channel A-2 GVF Output Data Critical Slope 0.02590 ft/ft Bentley Systems, Inc. Haestad Methods SoB1eitttectiRivwMaster V8i (SELECTseries 1) [08.11.01.03] 312312018 5:19:27 PM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 2 of 2 APPENDIX C-3 DRAINAGE CALCULATIONS REP I'rncrs in+y Dew] %mient - Severance, co u,'c1. f?r.ro11 ; f'I i.; yea 111 K:unlrihutints Ruins 1 actr icfo-i IIf ft icfo-i 1[Y' 17. 7m. In Int.. Ot i. N'elucih-n ifhl•i Pipe Diu. iint lrx: [luan¢it:cs. Cu .ntriE ;tin' Rusins U• r icfs, IIIeMr (chi Inlet •I'. ple Inlet Quantit1 KCorlhider :-hall pip .11::: a ripe; ia: l;p: 13 irlcl ;IN:.tnat;u pl a.':r/'I:iurd::r :{K l'.tilt yea r.: take k:?rap. Apron {` ;cu:a:tons a K Cuivcr.Outlets iirrl r"�'� ItE II) rIPC°.1) 1 n s31d;Fati" r::r sanca. Q:: lc sl '1'all'Sa1CI' :.pies vI 1 n Annie. v-h,ciI; .• f l• -;cl I;p:Ip .Zlr.Zar' IM`^.pth .'S far W4 I Jell+r . Jf'J�It r ;IT .\Jr alai: `I`') 4'-' " 'lip :tap r1 1gl It ti 1 11; q�tl11Un S n fin) '"�5� fit} >" I :flu wen n ill e s '31 : 1 i 1'', rglr n ) fttfir.l n::) rr, axl Ilk Iii n On r- n I).rncn-jons a: C'u1+'cns { Llpstrca ni On.}'I tilt clr rt1P) Pi r 1- rail .Lirtar \':ielh ( II :(iplap : urge - ill :,il P I i-. ev:Iti 'c I ram it a. Y:rrt+rI'pc reu• it_:.:•rnr cc' x611 KM:NVdinDi&hr'a ofnmdialtii 1. . rvra:NNlar ca e, ::':)::v.etrrl kart i.ltbar IAai rub. -.:)t airaly'Klil ctia Filar ttaI.1'nitn:I.Fiat et Mi)2I. NCI h`WIhCrCulct l al irra :{ace ilt. Ditch ea !co bons Ditch II} Cloud butt ng, ISusins I4-tr 14uI-5.r icfo-i icfo-i 'I''.pa tilde tiltpe% Channel Slope Depth of Ulan eft) k mild Depth 1lreehuurd ( 11 Planned 1.1in. Depth (II l clncit'. ifL4't litunhncss (:nclG ciunl Nr,wede 3 Ih13r. kudius ( 11 Ihcur file.) r• Pntsittn C'antral CI- arr. a A I K liI4 I. K N 2. ON 3.I I .C.11 :':3rlle+nW'ilah 1:1 ;.c(;, 1.33 - '.3a C.' 3. I:. 4.c* Q.1'_ T:{rr- i'harrelA? tti I I..F1 tiJ3 1':3ntu+rtWeil- 1:1 1'fi, II. In ' 3 .':.nn I'.II13 1.12 I:t" Ii.nS -Parr :.il.lrcul.:-:di'nyecls.: nrarmrD.I 433 I n.='l}C•, I4 1n Itieil}':tie prnl int:.d.alcs.t:Iairar,:::L, rn ticnceurc,.sltit APPENDIX C-4 DETENTION POND SIZING CALCULATIONS DETENTION BASIN STAGE -STORAGE TABLE BUILDER UD-Detention, Version 3.07 (February 2017) Project Bash ID: Wirt 'r r •t[w u a ,atItil 1 ? ▪ milked _ vices t - 1 r _ IFOILMACIJI ificpol Example Zone Configuration (Retention Pond) —IS4?r MI vn roe ✓ L x011•, arox +7orpeCGfl Required Volume Calcuation �eIeclec! Bh.P T}�+e = Watershed! ?tea = Welerst•ed Length = Watershed Slice = ?Valetshed Imperviousness = Percentage Hydrologic Soil Cicup A = Percentage H}•drolegic Soil Group B = Perr enlage Hydrolc;ic Soil Craps CO = Desired WQC'V Drain Time = EDB 13.54 1.150 0.015 32.064:, 100.0% 0. G':, 0.0":1 40.0 acres R Rift percent percent percent percent hairs Lccaticxl fox 1 -hr Rainfall Depths = Denver - Capild Bolding Water Quality Capture Volume QCV; = Excess Urban PonofT\+'rolurne (ELRV; = 2-yr Runoff Volume (P1 = 0.87 in.; = 5-yr Rumiff Volume (P1 = 1.16 in.; = 1C -pr Runoff' Volume(P1 = 1.44 in.; = a. -}r Runoff Volume (P1 = 1.9 in.; = 5C-yr Runoff Volume (P1 = 2.31 in.; = 106-yr Runca-Volume (P1 = 2.77 in.; = 540 Jr Runoff Volume (P1 = 4.03 in.; = Approximate 2-yr Detention Volume = Appcwirrlale 5-}r Detention Volume = A{rprr_rxirnale 10-}r Detection Volume = ispri++rr.Airnale 2 -}r Deterllicxr Volume = e1{prca:irnate 50-}r Detention Volume = Aptroxlrrlate 1 CC -}r Detention Volume = Stage -Storage Calculation Zone 1 Vclurne (:'+VQC+i; = Zone 2'Volurne (1C0 -year - Zone 1; = Select Zcxle 3 Storage Volume (Optimal; = Trial Detention Basin Volume = Initial Surcharge Volume (ISV; = Irliial Surcherr e Depth (ISD; = Total A' .7 Delexllicrl Depth (H 1; = Depth cf Trickle Channel (Hr c; = Slope cf Tricky: Channel (Sin; = Slq. es cf Main Basin Sides (S,,,,;,,; = Basin Leriglh-h-Width Ratio (Rr;,,v; = Initial Surcharge Area = Surcharge Vdurne Length (LEA = Surct•ange Volume Vilidth (AO = Depth cf Basin Flax (*.co) = Len;lt• c.if Basin Fluor (Lfir,,;,F) = Width. or Basin Floc( IV! rLOW = Area of Basin Floc( (Arcane) = Li me of Basin Floor (V v,,-) = Depth of r'Mn Basin (HF,:,;Inl = Length of Main Basin (Lr: Ira7 = Ydidlh cf Main Basin (V; .; Ifrj = Area cf Main Basin (Ay,:,IrJl = Vulurne cf Main Basin (+ir: n1) = C:alculalec! Total Basin *Lime ('vr:,,.l) _ 0.173 0.441 0.216 0.205 0.41)3 0.615 0.203 1.2g- 2.427 0.202 0.285 0.220 0.552 0.6:35 0.883 0178 0.706 0.°83 a 33. 3.00 0.50 0.501 4 2 70 8.4 8.4 0.1 7 177.7 gay 16.468 2.00 193.7 11)3.7 21.053 37 453 0.884 acre -feel acre-feet acre -feel acre -feel acre -feel acre -feel acre-feet acre-feet acre-feet all; refeel acre-feet acre-feet a ere4'est acre -feel acre-feet acre-feet acre-feet acre -feel acre-feet 1V3 R R R (VI H:V (112 R R R. R. R Rr2 R2 R R R 1112 R9 acre -feel Optional User Override -tir Frecipilaion 0.87 1.16 1.44 1 .O 1rr 403 inches inches inches aches riches inches inches DE4ih Increment = 0.5 R Stage. - Storage Descriptioxr Stage (R; Optioned Override Slice (a; Len;tt• (R; Width (II; Area (It'd; Oplione Override Area, (R 2; Area (acre; Volume (11'3; Volume (ac -fl; Top of Micropool 0.00 3•.4 8.4 70 a0O2 SV 0.33 a4 84 70 0.002 23 O.COI 0.50 8.4 4 4 70 0.002 34 0.001 Floor 1.00 1 ea 38.4 14.£41 0.243 917 0.021 100 16.9.0 88.4 14.011 0.343 917 0.021 Zone 1 (W0CV) 1.40 120.9 95.9 17.246 0.293 7.836 0.180 L50 181.6 263 17.546 0.403 9.407 0.216 200 1.8..6 150.6 18.675 0.429 18.460 0.424 2.50 1 39' 104.7 19.356 0456 23.285 0.649 Zone 2 (100 -par) 3.00 1937 11,4.7 21.053 0.463 33.512 0.864 3.50 197.7 112.7 22218 0.511 49.'344 1.133 4.00 201.7 116.7 23.526 0.540 60.726 1.396 4.50 205.7 120.7 24.825 0.570 72385 1.673 5.00 209 7 124.7 26.147 O.CCO 35.627 1 956 5.50 213.7 123.7 27.501 0.631 99.037 2.274 6.00 217.7 132/ 23.326 0.663 113.133 2.597 65.0 221.7 136.7 30.204 0.CSG 127529 2.937 7.00 225.7 140.7 31.753 0.729 143.441 3.293 7.50 229.7 144.7 31235 0.763 159.687 3.666 8.00 217 148.7 34.748 0.798 176.681 4.056 8.50 2377 152.7 35.294 0333 194.440 4.454 9.00 241.7 156.7 37.871 0.369 212.930 4.839 a 50 245,7 150.7 39.481 0106 237.317 5.333 10.50 249.7 164.7 41.122 0244 252.466 5.726 10.50 253.7 153.7 41756 0.9:32 273.444 6.277 11.50 257 7 172.7 44.501 1.022 2.5.267 6.778 11.50 261.7 176.7 46.239 1.C61 317.951 7.299 1250 265.7 1:20.7 48. DM 1.102 241.511 7.340 1250 26597 184.7 49810 1.143 265564 8.401 13 CO 2737 183.7 51.643 1.1:26 391.326 8.934 1350 277.7 192.7 51509 1.223 417.613 9.587 14.50 2817 155.7 55.406 1.272 444.840 10.212 14.50 235.7 200.7 57.326 1.316 473.024 10.859 15.50 289.7 204.7 59.297 1.261 542.181 11.523 to-0etenllcxl_v3.07.xlsrn. Basin 8124/2018, 1:46 PM DETENTION BASIN STAGE -STORAGE TABLE BUILDER UD-Detention, Version 3.07 (February 2017) 300 225 S L 150 L G 75 U S96UU - ST A 1 ac7UU 29800 14900 .00 4.00 aLength ilt) 800 Stag* (ft) aWkith (it) aArea(sq.tt.) 12h0 16.uu U 1.3W 1.035 U.3tS u..tlm 0.00 4.00 too Slip (ft.) —Area (acres)—Volume(ac#t) 12.00 13.655 5.71U 2.1185 0,000 16.UU vaiume (ac -ft) LO-Oetenliai O.07.dsm. Basin 8241201& 1:46 PM Detention Basin Outlet Structure Design UD-Detention, Version 3.07 { Fe bruary 2017) 10'1- V R vri l I I'AF Project: Basin ID: ,-ZONE a ZONE 1 2OIiE r" PER MAPIEUJT F'C'J L 2oNE 1 A110 2'' ORIFICES Example Zone Configuration {Retention Pond) ORIFICE User Input: Orifice at Underdrain Outlet (typically used to drain WQCV in a Filtration BMP) Underdrain Orifice Invert Depth = Underdrain Orifice Diameter= N/A N/A Zone 1 (WQCV) !one 2 (100 -year) Zone 3 Stage (ft) Zone Volume (ac -ft) Outlet Type 1.40 0.178 Orifice Plate 3.00 0.706 Weir&Pipe (Resirici) ft (distance below the filtration media surface) inches 0.8813 Total Calculated Parameters for Underdrain Underdrain Orifice Area = Underdrain Orifice Centroid = N/A N/A ft' feet User Input: Orifice Plate with one or more orifices or Elliptical Slot Weir (typically used to drain WQCV and/or EURV in a sedimentation BMP) Invert of Lowest Orifice = Depth at top of Zone using Orifice Plate = Orifice Plate: Orifice Vertical Spacing= Orifice Plate: Orifice Area per Row = 0.00 1.40 5.45 0.65 ft (relative to basin bottom at Stage = oft) ft (relative to basin bottom at Stage = Oft) inches sq. inches (diameter= 7/8 inch) User Input: Stage and Total Area of Each Orifice Row (numbered from lowest to highest) Stage of Orifice Centroid (ft) Orifice Area (sq. inches) Stage of Orifice Centroid (ft) Orifice Area (sq. inches) Calculated Parameters for Plate 4.514E-03 N/A N/A N/A \NQ Orifice Area per Row = ft' Elliptical Half -Width = Elliptical Slot Centroid = Elliptical Slot Area = feet feet ft` Row 1 (required) Row 2 (optional) Row 3 (optional) Row 4 (optional) Row 5 (optional) Row 6 (optional) Row 7 (optional) Row B (optional) 0 00 0 50 1 00 0.65 0.65 0.65 0.65 Row 9 (optional) Row 10 (optional) Row 11 (optional) Row 12 (optional) Row 13 (optional) Row 14 (optional) Row 15 (optional) Row 16 (optional) User Input: Vertical Orifice (Circular or Rectangular) Invert of Vertical Orifice = Depth at top of Zone using Vertical Orifice = Vertical Orifice Diameter= Not Selected Not Selected ft {relative to basin bottom at Stage = 0 ft) ft {relative to basin bottom at Stage = 0 ft) inches Calculated Parameters for Vertical Orifice Vertical Orifice Area = Vertical Orifice Centroid = Not Selected Not Selected ft` feet User Input: Overflow Weir (Dropbox) and Grate {Flat or Sloped) Overflow Weir Front Edge Height, Ho = Overflow Weir Front Edge Length = Overflow Weir Slope = Horiz. Length of Weir Sides = Overflow Grate Open Area %= Debris Clogging %_ Zone 2 Weir Not Selected 1.40 4.00 0.00 4.00 70% 50% ft (relative LL7 basin bottom di Stage = 0 IL) feet H:V (enter zero for flat grate) feet %, grate open area/total area User Input: Outlet Pipe w/ Flow Restriction Plate (Circular Orifice, Restrictor Plate, or Rectangular Orifice) Depth to Invert of Outlet Pipe = Outlet Pipe Diameter = Restrictor Plate Height Above Pipe Invert = Zone 2 Restrict or Not Selected 0.00 12.00 1,33 User Input: Emergency Spillway (Rectangular or Trapezoidal) Spillway Invert Stage= Spillway Crest Length = Spillway End Slopes = Freeboard above Max Water Surface = 3.69 8.00 4.00 1.00 ft {distance below basin bolloni al Stage = 0 IL) inches inches ft (relative to basin bottom at Stage = 0 ft) feet H:V feet Calculated Parameters for Overflow Weir Height of Grate Upper Edge, Ht= Over Flow Weir Slope Length = Grate Open Area / 100-yr Orifice Area = Overflow Grate Open Area w/o Debris = Overflow Grate Open Area w/ Debris = Zone 2 Weir Not Selected 1.40 4.00 235.65 11.20 5.60 feet feet should be > 4 ft` ft Calculated Parameters for Outlet Pipe w/ Flow Restriction Plate Outlet Orifice Area = Outlet Orifice Centroid = Half -Central Angle of Restrictor Plate on Pipe = Zone 2 Restrictor Not Selected 0.05 0.07 0.68 N/A Calculated Parameters for Spillway Spillway Design Flow Depth= Stage at Top of Freeboard = Basin Area at Top of Freeboard = 0.80 5.49 0,63 feet feet acres ft` feet radians Routed Hydrograph Results Design Storm Return Period = One -Hour Rainfall Depth (in) = Calculated Runoff Volume (acre -ft) OPTIONAL Override Runoff Volume (acre -ft) Inflow Hydragraph Volume (acre -ft) _ Predevelopment Unit Peak Flow, q (cfslacre) = Predevelopment Peak Q (cfs) = Peak Inflow Q (cfs) = Peak Outflow CI (cfs) Ratio Peek Outflow to Predevelopment Q = Structure Controlling Flow = Max Velocity through Grate 1 (fps) _ Max Velocity through Grate 2 (fps) Time to Drain 97% of Inflow Volume (hours) = Time to Drain 99% of Inflow Volume (hours) Maximum Ponding Depth (ft) _ Area at Maximum Ponding Depth (acres) _ Maximum Volume Stored (acre -ft) _ WOCV EURV 2 Year 5 Year 10 Year 25 Year 50 Year 100 Year 500 Year 0.53 1.07 0.87 1.16 1.44 1,90 2.31 2.77 4.03 0.178 0.441 0.216 0.305 0.4081 0.615 0.903 1,299 2.427 0.178 0.440 0.216 0.305 0.407 0.615 0.903 1.298 2.427 0.00 0.00 0.00 0.00 0.01 0.02 0.18 0.47 1.26 0.0 0.0 0.0 0.0 0.1 0.3 2.5 6.4 17.0 2.8 6.8 3.4 4.7 6.3 9.4 13.8 19.7 36.6 0.1 0.3 0.3 0.3 0.3 0.3 0.4 04 16.4 N/A N/A N/A 5 9 2.6 1.1 0.2 0.1 1.0 Plate Outlet Plate 1 Overflow Grate 1 Outlet Plate 1 Outlet Plate 1 Outlet Plate 1 Outlet Plate 1 Outlet Plate 1 Spillway N/A 0.02 0.01 0.0 0.0 0.0 0.0 0.0 0.0 N/A N/A N/A N/A N/A N/A N/A N/A N/A 44 53 47 50 52 58 64 72 64 45 56 49 52 55 62 70 80 78 1.37 1.92 1.43 1.62 1.85 2.31 2.91 3.68 4.34 0.40 0.43 0.40 0.41 0.42 0.45 0.48 0.52 0.56 0.164 0.394 0.192 0.269 0.364 0.559 0.841 1.226 1.583 Detention Basin Outlet Structure Design UD-Detention, Version 3.07 (February 2017) 40 35 30 25 N 20 O 15 10 5 L 5CQYR IN SC0YR OUT a 1C0YR IN a a 1C0YR OUT a 50YRIN - a a 50YROUT - 25YRIN nil.- 25YROUT 10YRIN -as '10YROUT �SYRIN - 5YR OUT _ 21R INAILL. fwd 2YR OUT • EURVIN I. EURVOUT - WWI • IN WQCV OUT r • . . tallitt.. il • • • . . • 140;laMl- II I' '-The.. '. •r• Iv._ . _ - 4.5 4- 3.5 3 I - a 0 2.5 0 z O 2 1.5 1 0.5 0 1 TIME [hr] 10 5C0YR 1O0YR S0YR 25YR ,14YR 5YR 2YR EURV WQCV r ii 1M1I ahlititr 1 0.1 1 DRAIN TIME Mr] 10 1013 AREA MA2], VOLUME [ftA3] 600,000 500,000 400,000 300,000 200,000 100,000 0 w� User Area [I1A2] — Interpolated Area IfL^2] • • a • - Summary Area [f L^21 Volume [fl^3] ••4.•- Summary Volume Ift^3]. Oulfiow Ids] ••4 •- SummaryOinflow[cfsj 0.00 2.00 4.00 6.00 8.00 PONDING DEPTH Ift] 10.00 12.00 14.00 6,000.00 5,00O.00 4,000.00 3,000.00 LL 2,000.00 1,000.00 0.00 16.00 S -A -V -D Chart Axis Override minimum bound maximum bound X-axis Left V -Axis Right V -Axis Detention Basin Outlet Structure Design Time Interval 5.42 min Hydrograph Constant 0.922 Outflow Hydrograph Workbook Filename: Storm Inflow Hydrographs UDC -Detention, Version 3.07 (February 2017) The user can override the calculated inflow hydrographs from this workbook with inflow hydrographs developed in a separate program. SOURCE WORKBOOK WORKBOOK WORKBOOK WORKBOOK WORKBOOK WORKBOOK WORKBOOK WORKBOOK WORKBOOK TIME WC.CV (cfsJ EURV (cfsJ 2 Year [cis] 5 Year [cfsj 10 Year (cfs] 25 Year [ifs] 50 Year tcfsi 100 Year (cfsJ 500 Year [cfsj 0:00:00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0:05:25 0.00 0,00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0:10:50 0.00 o.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0:16:16 0.13 0,30 0.15 0.21 0.23 0.42 0.61 0,86 1.56 0:21:41 0.33 0.81 0.40 0.57 0,15 1.13 1.64 2.33 4.28 0:27:06 0.86 2.08 1.04 1.46 1.93 2.89 4.21 5.99 10.99 0:32:31 2.37 5.73 2.86 4.01 5,31 7.95 11.56 16.45 30.17 0:37:56 2/7 6.77 3.35 4.72 6.27 9.43 13/8 19.73 36.58 0:43:22 2.63 6.45 3.19 4.49 5,98 8.99 13.16 18.87 35.05 0:48:47 2.39 5.87 2.90 4.08 5.44 8.19 11.99 17.17 31.90 0:54:12 2.12 5.23 2.57 3.63 4,85 7.31 10.72 15.39 23.67 0:59:37 1.81 4.51 2.21 3.12 4.17 6.31 9.28 13.34 24.97 1:05:02 1.59 3.93 1.93 2.73 3.64 5.50 8.08 11.60 21.73 1:10:28 1.43 3.56 1.74 2.47 3.29 4.98 7.32 10.52 19.68 1:15:53 1.17 2,93 1.42 2.02 2.71 4.11 6.06 8.74 16.43 1:21:18 0.94 2,38 1.15 1.64 2.20 3.35 4.96 7.18 13.57 1:26:43 0.71 1,82 0.87 1.25 1.68 2.58 3.34 5.53 10.67 1:32:08 0.51 1.35 0.63 0.92 1,24 1.92 2.38 4,22 8.16 1:37:34 033 0.93 0.47 0.67 0.90 1.39 2.08 3.08 6.03 1:42:59 0.30 0.76 0.36 0.52 0.70 1.08 1.60 2,36 4.56 1:48:24 0.25 0.63 0.30 0.43 0.58 0.39 1.32 1,93 3.70 1:53:49 0.21 0.53 0.26 0.37 0.49 0.75 1.12 1.63 3.12 1:59:14 0.18 0.47 0.23 032 0.43 0.66 0.98 1.43 2.72 2:04:40 0.17 0.42 0.20 029 0,39 0.60 0.88 1.28 2.44 2:10:05 0.16 0.39 0.19 0.27 0,36 0.55 0.81 1.18 2.24 2:15:30 0.11 0.29 0.14 0.20 0.27 0.40 0.60 0.87 1.66 2:20:55 0.08 0.21 0.10 0.14 0.19 0.30 0.44 0.63 1.20 2:26:20 0.06 0.15 0.07 0.11 0.14 0.22 0.32 0.47 0.89 2:31:46 0.04 0.11 0.05 0.08 0.10 0.16 0.24 0.34 0.65 2:37:11 0.03 0.08 0.04 0.05 0.07 0.11 0.17 0.25 0.48 2:42:36 0.02 0.06 0.03 0.04 0.05 0.08 0.12 0,18 0.34 2:48:01 0.02 0.04 0.02 0.03 0,04 0.06 0.09 0.13 0.25 2:53:26 0.01 0.03 0.01 0.02 0.02 0.04 0.06 0.09 0.17 2:58:52 0.01 0.02 0.01 0.01 0.01 0.02 0.03 0,05 0.11 3:04:17 0.00 0.01 0.00 0.00 0.01 0.01 0.02 0.03 0.06 3:09:42 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0,01 0.03 3:15:07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 3:20:32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3:25:58 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3:31:23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3:36:48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3:42:13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3:47:38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3:53:04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3:58:29 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:03:54 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:09:19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:14:44 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0,00 0.00 4:20:10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:25:35 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0,00 0.00 4:31:00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:36:25 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:41:50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:47:16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:52:41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4:58:06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:03:31 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 5:08:56 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:14:22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:19:47 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:25:12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:30:37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:36:02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:41:28 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 5:46:53 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:52:18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:57:43 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6:03:08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6:08:34 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6:13:59 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6:19:24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6:24:49 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6:30:14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Detention Basin Outlet Structure Design UD-Detention, Version 3.07 (February 2017) Summary Stage -Area -Volume -Discharge Relationships The user can create a summary S -A -V -U by entering the desired stage increments and the remainder of the table will populate automatically. The user should graphically co spare the summary S -A -V -D table to the full S -A -V -D table in the chart to confirm it captures all key transition points. Stage -Storage Description Stage ,4:] Area h 2] Area acres):'..:31/43) Volume VoLime lac-":] Total Om/lo4v . s] For best results. include the stages of all grade slope changes {e.g. ISV and Floor) from the S -A -V table on Sheet 'Basin'. (Also include the inverts of all outlets {e.g. vertical orifice, overflow grate, and spillway, where applicable). e a R ■ a s -a ■f • a. a AP et e- ar IP ee a a al Pip r 4f a ir a 4, !a a■rr- a a r r° • r AA IAA X a a a e 1I L I r di 4 eta. S. Aar r 7.• l a LEGEND: UHAINAGE FLOW HIS IOhtIC UHAINACL BASIN SOUNL`ARY UHAINACE FLO''NI'AIH a — I'HOF'Eit7Y LINE I'Of N1 OF ANALYSIS UNAINHOE CASIN NAVE SYtAR I 'LAK L'ISCHARGL NQOYEAR I'EAK DISCHARGE DRAINAGE BASIN ACREAGE i A U 15U• 30U• SCALE: 1' _ alit TETRA TECH iT z • r�� T CO O ILO Z el ce'? IO ' cc 790 WEJ .0 [� ❑ yr F — W u< rod w • } W m W LuEn U7 z P•yi;s' hc;.: ?'';Li!ar,.i1A-1 It'n'.2 ria!i •;1• ey: Drrxn Ey: CFl`. Cts ka 3,: Bar rdeasure6 1 Intl 3 , LEGEND: DRAINAGE I -LO _ 4Be±DRAINAGE EASIN BOUNDARY DRAINAGE I -LOW a m - - mOPEmveNE A ,G ,Ol= ANALYSIS DRAINAGE bAs NAME 5Ym I JERKuKHAmE ,e YEAH PEAK DISCHARGE DRAINAGE BASIN ACREAGE U ,+ Alk A mW ««e« TETRA TECH xrntiru:rnoxh.sam CO .02 / z 7§ W co O w da- 9§§ \ \ X\ Q z ®L 5§= 3 ir \ §§ F EL Low W _> L- W En Pomp ,k:r,ur, riamm• By n me �F. Ct m! » 2 bar wa+sl. 1 2 3 I 4 I 6 I 6 bar rveaauras 1 into LEAINAGE L AS IN HARE 10 YPEAK U$SCHARCE 100 YEAR PEAK LHSCHAIZCE 1 S S GALVANIZED CLOSE k ESH OHA I E - SEE CIJOI W -b0.1 -1U I- OR CONS I HJ C I ION ANL` rdOUN II NC LEI AILS. CDC CLOSED N+E$H CA 1E ea 7y; ftESIFIC1ORI"LA1E 4 Bar Meagan's 1 Ind, 5 OPENINGS FOR DIAWE1ER, SEETABLE IOI' OF OUTLET S'RUC ID HE LJE I ENTION POND WOCV ORWICE PLATE OU ILET SI RUC I LIRE SHALL HE OLDCAST LE PRECAST S I OHr CA IC H h3ASIN OR AI'I'ROVEL` EQUAL. I.:ICIi0,POOC SHALL BE 4' 1HICK CONCRETE WIl H IVEW'EL' WIRE WtSH I3Xki W1.4X'PPt.4. 2' CLH r _itS kings ‘56G - SAN YGS-L.x<<rt'.r•rt t=i.'.'iiC:'..:h"iT.C15 Varaei': C+"I'LAW_.wAVe:VSWA-MS4ISentak COWI'AC I EL` IYI'IGAL $F�1LLWAY SEG1 ION 1,1 • EAk1H I:15°.1;SIANLWkL` I'HOC I OR DENS' IT L. CONS IRUC I CON CRE I E CUTOFF WALL A I UPS I HEAW END OF 1H E SPILLWAY AS SHOWN IN DETAIL_ CU I OFF WALLS SHALL EX !END A Id ININ' wry- OF b' I'AS I I Ht OPENINO OF IHt I OP OF SPILLWAY ON EACH SIDE OF 1HESI'ILL'WAYASSHOWN IN L`EIAIL. CU I OFF WALLS SHALL SEA WINit/LW 01- S` THICK ANDWINIWUM 3' DEEP WALLS SHALLUSE 311UU PSI CONCRETE i� 2 i DETENTION POND EMERGENCY SPILLWAY DETAIL - ; NIS SEE 1ABLE 1 -OR 0I'ENI NC RHEA. OPENING CAI I ANISLIOIIOW RESTRIC ION PLATE ELEVA II ON National Flood Hazard Layer FIRMette FEMA Legend 104`'48'42.6E" W 40°35'45.60"N 40°35'18.28"N Feet 2,000 1:6,000 0 250 500 1,000 1,500 SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT SPECIAL FLOOD HAZARD AREAS Without Base Flood Elevation (BFE) Zone A, V, 499 With BFE or Depth Zone AE, AO, AR, VS, AR Regulatory Floodway OTHER AREAS OF FLOOD HAZARD MUCZ r2fr t Q I. OTHER AREAS GENERAL STRUCTURES OTHER FEATURES MAP PANELS NO SCREEN 0.2% Annual Chance Flood Hazard, Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mile zone x Future Conditions 1% Annual Chance Flood Hazard Zone X Area with Reduced Flood Risk due to Levee. See Notes. Zone x Area with Flood Risk due to Leveezone D Area of Minimal Flood Hazard zone x Effective LOMRs Area of Undetermined Flood Hazard Zone o - - - - Channel, Culvert, or Storm Sewer Levee, Dike, or Floodwall 20.2 Cross Sections with 1% Annual Chance 17.5 Water Surface Elevation - - Coastal Transect �... sr; Base Flood Elevation Line (BFE) Limit of Study Jurisdiction Boundary Coastal Transect Baseline Profile Baseline Hydrographic Feature r Digital Data Available No Digital Data Available Unmapped N The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The basemap shown complies with FEMA's basemap accuracy standards The flood hazard information is derived directly from the authoritative NFHL web services provided by FE MA. This map was exported on 8/24/2018 at 1:09:41 PM and does not reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or become superseded by new data over time. This map image is void if the one or more of the following map elements do not appear basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for unmapped and unmodernized areas cannot be used for regulatory purposes. Severance Compression Facility Noise Modeling Report October 17, 2018 Prepared for: Rimrock Energy Partners 5956 Sherry Lane, Suite 825 Dallas, TX 75225 Prepared by: Behrens and Associates, Inc. 13806 Inglewood Avenue Hawthorne California, 90250 f Andrew Truitt Senior Engineer Jason Peetz Engineering Manager Corporate Office: Hawthorne, California Carson, California — Alecto, Texas — Napa California — L.on Mont, Colorado — McDonald, Pennsylvania 800-679-8633 www _environmental-noise-control.com www_drillin` noisec.ontrol_com Behrens and Associates, Inc. Environmental Noise Control 1. Introduction The following report provides a noise modeling assessment of the proposed Severance Compression Facility operated by Rimrock Energy Partners in relation to the Weld County, Colorado noise regulations. The noise modeling includes currently proposed Phase 1 and Phase 2 mechanical equipment per approved project documents dated 8/17/18. The Severance Compression Facility (40°35'26.82"N, 104°48'14.58"W) is located adjacent to the intersection of Weld County Road 84 and Weld County Road 27 approximately 5.2 miles northeast of Severance. The site is bordered by agricultural land with some single-family homes to the north, south, east, and west. Figure 1-1 identifies the pad location. To assess the predicted noise levels of the proposed operations, manufacturer sound level data ofproposed equipment, exhaust silencers, and acoustical buildings was used when available. File sound level data previously measured and typical of the equipment was used when manufacturer sound level performance data was not available. The equipment sound level data was used to construct a noise model using SoundPLAN 8.0 software. The following is provided in this report: • A brief introduction of the fundamentals of noise. • A review of the applicable Weld County noise standards. • Presentation of ambient sound level survey results. • Discussion of noise modeling methodology and results. Figure 1-1 Rimrock Energy Partners Location introduction Behrens and Associates, Inc. Environmental Noise Control 2. Noise Fundamentals Sound is most commonly experienced by people as pressure waves passing through air. These rapid fluctuations in air pressure are processed by the human auditory system to produce the sensation of sound. The rate at which sound pressure changes occur is called the frequency. Frequency is usually measured as the number of oscillations per second or Hertz (Hz). Frequencies that can be heard by a healthy human ear range from approximately 20 Hz to 20,000 Hz. Toward the lower end of this range are low-pitched sounds, including those that might be described as a "rumble" or "boom". At the higher end of the range are high-pitched sounds that might be described as a "screech" or "hiss". Environmental noise generally derives, in part, from a combination of distant noise sources. Such sources may include common experiences such as distant traffic, wind in trees, and distant industrial or farming activities. These distant sources create a low-level "background noise" in which no particular individual source is identifiable. Background noise is often relatively constant from moment to moment but varies slowly from hour to hour as natural forces change or as human activity follows its daily cycle. Superimposed on this low-level, slowly varying background noise is a succession of identifiable noisy events of relatively brief duration. These events may include the passing of single -vehicles, aircraft flyovers, screeching of brakes, and other short-term events. The presence of these short-term events causes the noise level to fluctuate. Typical indoor and outdoor A -weighted sound levels are shown in Figure 2-1. Detailed acoustical definitions have been provided in Appendix A — Glossary of Acoustical Terms. COMMON OUTDOOR NOISE LEVEL COMMON INDOOR SOUND LEVELS dB (A) SOUND LEVELS 110 Rock Band 8-747-200 Takeoff at 2 mi, Gas Lawn Mower at 3 ft. Diesel Truck at 150 ft. DC -9-30 Takeoff at 2 m i. Noisy Urban Daytime B457Takeoff at2mi. Commercial Area Th J. l Quiet Urban Daytime Quiet Urban Nighttime Quiet Suburban Nighttime L r, a - - Quiet Rural Nighttime 4 ilaadtaT— F _ 100 Inside Subway Train (New York) 90 80 70 60 50 40 30 20 10 Food Slender at 3 ft. Garbage Disposal at 3 ft Shouting at 3 ft, Vacuum Cleaner at 10 ft. Normal Speech at 3 ft, Large Business Office Dishwasher Next Room Small Theatre, Large Conference Room (Background) Library Bedroom at Night _ Concert Halt (Background Broadcast & Recording Studio 0 Threshold of Hearing Figure 2-1 Typical Indoor and Outdoor A -Weighted Sound Levels Noise Fundamentals Behrens and Associates, Inc. Environmental Noise Control 3. Weld County Noise Standards The modeling analysis was developed to predict operational noise levels at adjacent properties and verify compliance of operations with the Weld County noise standards. The Weld County code establishes permissible sound levels by type of property and hours of the day. The measurement location is defined in Section 14-9-50-A.2. "A noise originating on private property shall be measured at or within the boundary of the property from which the noise complaint is made". Based on the specifications of the Weld County code, the Residential noise level limits listed in Table 3-1 will be used throughout the report. Table 3-1. Home Rule Charter for the County of Weld, Colorado, Chapter 14, Article IX — Noise, Section 14- 9-40 — Maximum Permissible Noise Levels Land Use Maximum 7:00 Noise am to next (dBA) 9:00 pm Maximum Noise 9:00 pm to next (dBA) 7:00 am Residential or Commercial 55 cRA 50 dRA Industrial Area or Construction 60 c RA 55 dBA Nonspecific Areas 70 dBA 65 dBA Weld County Noise Standards Behrens and Associates, Inc. Environmental Noise Control 4. Ambient Sound Level Survey An ambient sound level survey was performed at the proposed location for the Rimrock Energy PartnersSeverance Compression Facility near Severance from Wednesday, August 8th to Monday, August 13t", 2018 to measure and document the ambient sound levels on and near the property prior to construction or operational startup. The full report was authored on August 13th, 2018 and provides daily data and additional details. The data presented below is summarized from the full report. The instrumentation used for each monitoring location was a Svantek Model 971, Type 1, integrating and logging sound level meter. The Svantek sound level meters were calibrated with a Quest QC -10 calibrator. The measurement systems were deployed at four locations at the proposed plant property boundaries. The meters were deployed at a measurement height of approximately 4 feet above ground per ANSI standards. A Davis Vantage Vue weather station was deployed to measure wind speeds on site. Sound level data measured during wind speeds in excess of 25 mph were omitted per Weld County Noise Standards. Figure 4-1 shows the locations of meters one through four. Table 4-1 below presents the average (L,,) daytime (7am — 9pm) and nighttime (9pm — 7am) noise level measurements at each monitoring location over the entire deployment period. Table 4-1 Ambient Sound Level Measurements for Severance Compression Facility Rimrock Energy Partners - Severance Compression Facility Measurement Location Average Daytime (dBA) Ambient Noise Levels Average Nighttime (dBA) Ambient Noise Levels 1 44.6 47.2 2 43.5 45.2 3 45.8 45.5 4 46.2 46.4 Weld Noise County Limit 55 dBA 50 dBA Ambient Sound Level Survey Behrens and Associates, Inc. Environmental Noise Control Rimrock Energy Partners Property Line Measurement Location Figure 4-1 Ambient Sound Level Measurement Locations Measurement Location 1 Measurement Location 2 Ambient Sound Level Survey 5 Behrens and Associates, Inc. Environmental Noise Control 5. Severance Compression Facility Noise Modeling 5.1 Noise Modeling Methodology The noise modeling was completed with use of three-dimensional computer noise modeling software. All models in this report were developed with SoundPLAN 8.0 software using the ISO 9613-2 standard. Noise levels arc predicted based on the locations, noise levels and frequency spectra of the noise sources, and the geometry and reflective properties of the local terrain, buildings and barriers. SoundPLAN 8.0 software simulates light downwind conditions in all directions to ensure conservative assessments. The predicted noise levels represent only the contribution of the proposed gas plant operations and do not include ambient noise or noise from other facilities. Actual field sound level measurements may vary from the modeled noise levels due to other noise sources such as traffic, other facilities, other human activity, or environmental factors. The Phase 1 and Phase 2 equipment sound level data used in the Severance Compression Facility plant modeling was sourced from equipment manufacturer data per approved project design documentation when applicable and if available. Please note that Phase 2 modeling includes the equipment for Phase 1 as well since this equipment will be operational at which point in time Phase 2 is implemented. The modeling results predicted are dependent on equipment and mitigation orientation as indicated per current (Rev. Date 8/17/18) project documentation. Figure 5-1 shows the Severance Compression Facility plot plan and mechanical equipment layouts utilized in the study for Phase 1. Table 5-1 lists the modeled equipment for Phase 1 of the facility. Figure 5-2 shows the Severance Compression Facility plot plan and mechanical equipment layouts utilized in the study for Phase 2. Table 5-2 lists the modeled equipment for Phase 2 of the facility. Table 5-1 Phase 1 Equipment Modeled for Severance Compression Facility Quantity Proposed Equipment Data Source Source Power (Lw dBA) Sound Level Equipment Type 8 Inlet Compressor Engine Waukesha 7044 S5 Manufacturer Data 115.1 8 Inlet Com p ressor Waukesha Maxim 7044 Silencer S5 with — Manufacturer Data 73.0 Engine Exhaust MCCTG6-4-16O3 8 Inlet Compressor Ariel JGK-4 Manufacturer Data 98.1 8 Inlet Compressor Manufacturer Data 100.1 AXH 168EF with MAG Cooler Fan Severance Compression Facility Noise Modeling Behrens and Associates, Inc. Environmental Noise Control Table 5-2 Phase 2 Equipment Modeled for Severance Compression Facility Quantity Equipment Type Proposed Equipment Data Source Source Sound Power Level (Lw dBA NA Phase 1 Equipment Phase Listed 1 Equipment in Table 5-1 Phase 1 Equipment in Table Listed 5-1 NA Listed in Table 5-1 8 Inlet Engine Compressor Elcctri r 5500 HP AC Drive Calculated Data 101.4 8 Inlet Compressor Ariel -6 Manufacturer Data 98.1 8Inlet Compressor AXH 15 6-2ZF Manufacturer Data 100.1 Cooler 5.2 Noise Sensitive Receptors The noise sensitive receptors have been chosen to be consistent with the requirements of the Weld County, Colorado noise standards. The requirements indicate that a noise originating on private property shall be measured at or within the boundary of the property from which the noise complaint is made. As such, receptor locations were chosen at the surrounding property lines of the Severance Compression Facility to represent potential regulatory measurement points should a complaint be made. Figure 5-3 shows the dBA noise sensitive receptor locations. Severance Compression Facility Noise Modeling 7 Behrens and Associates, Inc. E nvirotnental Noise Control r I 1 I ■ i • I ;a■ a I *It 4 •Tr ■ • f• • a •• r ■ ! • e • • e- • I% ssa s- r li oh a a Iii i f It a - a 'I ■ • ■ r • 'r • r • ■L•'I a M • • • • • 4a • • •, • &bw deer / ■ 7 ■ • a ■ • M• • dal• ■ • • • • • r ■ • a• • L U. • r ■ ■ ■•L L■ • r ati • ■ ▪ 14 • a • 1 4 a a T M •• re J a I • • + It:�I • • • r • ▪ . • a 4 ■ OP • kr•deIP • a+ s • • r a • al ■ ■ •1. a ! I a a Na. • I a •■ • a • • T ■ • r If r. L I 1.• M• E-. r L+u. C CL r TL I CPI • I Cs: It rrrTanF6. I CT1 R. L .IC.. G .1 1.1 I..0- I -CLI E L -T .t -t -C IT. "- ° I - - crag 14 tC 1 I -TL- M - -r -°C T - ' - ! H!7! • • ✓ • ! 4 • +L • 1 a • ■ ■ • • I. ■ 'i ■ • * + • • •• • * 'us ■ • ■ ■ ■ ■ • • ■ + i ■ • —+-i— I. ■ • • • • dr ■ t* • • a ■ • •• ■ a •`• • 4t r ■ y JAL • +r •• 3 w• • • • :! • a■r +■ .. • = • ■ r '■ /I +'!•• ▪ op r ill O I • I a •• • • • •• a ■ a • a r a ■ r la • ■ • L • • ■ • • • ■ • r •L ■ ■ al • II. • •• 4 I•■▪ ■• • a • w a•a •r ■■ +IY ■ + w • r M L'J1 -IC ar a a Y —IFY �•• mar', ■ I I T a- • o r ■ * ; • r !ill ■ i i I • •• • 4 • ! +r 41, L r. fiel ■ + 3 ■ ■ ■ T ■ • • No ■ • '°.ms • • • ■ ■ ■ I ■ •- T■ •' a • ■ it • f I a+ • #• a• ■■ ma a r• I r P. r w lit* t • + a ••■ r i r • + ■ I I. • M • le• w •r Si. w•• • ▪ i ■ —21— C:I I C C+I .1 C CL I I C IE - e° • - •r ■ • ■ Figure 5-1 Severance Compression Facility Phase 1 Plot Plan (Rev. Date 8/17/18) 9 I 1 r CCMAPR€S ORSITE #1 El I E . E —a-■ — - • •w • • a ■ !+■ a • i ■ • • r r ■ 'w a •• I' • • s a • • ' r•! Y • •o • • ■■ ▪ ▪ ■ • ■• • • ■ • r I: r PLOT -I 7 —a_ L LAM w • • ■1• r • • �• ■ mist r • a ! i I. * �•• r j•r •• If• C I C ■ a • i • • • • • L • • + ■ a • U. di • + all • •• ■w •• ■ ! ■ ■ ■ Is • -r andi 4 a • •, w • f■ •a • ■r • ■ a + • ■ • r a r • • ••• LI C • * s • a i II • a... •■• isMI •7 It II L- T I' -HI - E IT C — _1 CT r E • �• • I•• ■ 91 r ■ ,• ••a I •i 7 ■ '' L AP 4 . rr• . I• ,; ■ r • I • i; I • • • in • let, I" • ■ •r • II - .. • • • • • y I. ■ ■ ■ • ■ • • P. 1 o • ► • ■ • • • ■ Ale a P N • a ■ • u• • • • • �.� • • •■ r + mac• w KfT0 AM Yelling lir 1112104011% 4"r'%I 1303.46 1.79n Lt Ml4•'a 1•IIDI LLC SITE LOCATION; - e 6 PLOT P LAN O74=ACE Iar ;PRELIMINARY -SKETCH SEY'4I7r"81 C i1 E I'. Ti Severance Compression Facility Noise Modeling Behrens and Associates, Inc. Environmental Noise Control a 6 I C E 3 N J PLANT ' i ORTH I -t N pyt' :'C+U 4: L.IJ t Lll t. Pt 5-$20(1 p■ MD SIP SRI .AMC t — il7C!! l �i u MC a: 21111 El 17\ #410) �■ flit CAi St➢ SIP% % IN -=zw.a s wn• %UM .[) l•i9 90 0 Uf vaapo - F--- ,.swot ■ w■I 0 4 1. tilinfrolitins, CUIE.tT s r I.L. 2•.LIM4. •raiz!_I DI. 'Jr I I 11.1000 'tu' CJ.Tf93� C AF LLILI-- WIN Cal cone .m Timm Calal 171MV5TLE •:• I MUM, it _ COMPRESSOR STTE ,4:;I‘mai Er awr, J 1 v ay. •il{.ar'*r' Lei `'1 -- d ram jat SII I:Ir • rt' • r — -Jt>— 1. C;2f00 Gi20G IiI 1, III rIN !HEMI 'In_■ - C 2i'0 -' ST 1UW ;a M fret 31.C. sPal COMPRESSOR SITE 1 1K6 PLOT PLAN IOW r-iiMer 1-1—'9a1�itim 7ia. I a W r <r L0CATk7II IDLE V E IPA t -S i'19i ?Lw 11$ TEN 'e w Lf WOOD VIUM FIEWILI tt -;,- I!) RR r l Wt a R am m boa cm Rwt WOO III iTISt i I Mau t SR ■t1? rrIC-V a t-assP wan arm awn oar 102,11 Fa SSW; 1I M FEW CpIMt WWII IIELINdr wn SE'd€1:ANCE CCiP€EflOR STATEN' !itw . MUM LLQ PLOT PLAN EQSIIPMENT LOCATION P' RELIMINAW( SKETCH 9Ytl1I /M a entre a - cgisiIVI Q1 TD alb 11.4 001LOlLI.Ca BOLE] I' - s r—ce Figure 5-2 Severance Compression Facility Phase 2 Plot Plan (Rev. Date 7/02/18) DIVE Iza mESEV-'1 IL1I uzfap ma, Tim ilts bt ¢ I i I I 1 Severance Compression Facility Noise Modeling 9 Behrens and Associates, Inc. Environmental Noise Control Receptor 5 Receptor 4 Receptor 3 Receptor 2 Receptor 1 Rimrock Energy Partners Property Line Receptor 12 Receptor 11 Figure 5-3 Noise Sensitive Receptor Locations (dBA) dBA Compliance Assessment Locations Receptor 6 Receptor 7 Receptor 8 Receptor 9 Receptor 10 Severance Compression Facility Noise Modeling Behrens and Associates, Inc. Environmental Noise Control 5.3 Phase 1 Noise Modeling Results Two modeling scenarios were created for Phase 1 to investigate various options at the proposed site and arc described in Table 5-3. The results of the noise modeling arc presented in Table 5-4. The locations in the tables correspond to the receptor locations identified in Figure 5-3. The results of the noise . odeling are also shown as noise contour maps. Figure 5-6 shows the Scenario 1 Noise Contour Map in dBA. i d Figure 5-7 shows the Scenario 2 Noise Contour Map in dBA. The noise contours arc provided in 5 dB increments with the color scale indicating the sound level of each contour. Table 5-3 Phase 1 Modeled Mitigation Scenarios Modeled Scenario Description Scenario 1 Baseline Compressor Phase 1 housed — station compressors are inside of a steel shell Waukesha building with compressor a minimum Sound Transmission engines include current Class specified silencers (STC) rating per of Table 25 and -1. The compressor coolers are to be specified with MALI fans per Table 5-1. Any doors, All louvers, or other penetration arc does to maintain include a minimum rating of STC 25. other mechanical equipment not supplemental noise mitigation — acoustical enclosures, silencers, etc. See Figure 5-4. Scenario 2 STC 40 Compressor Building — Compressor station Phase 1 compressors are housed inside of a steel shell building with a minimum Sound Transmission Class (STC) rating of 40 and Waukesha compressor engines include current specified silencers per Table 5-1. The compressor coolers are to be specified with MAG fans per Table 5-1. Any doors, louvers, or other penetration are to maintain a minimum rating of STC 40. All other mechanical equipment does not include supplemental See Figure 5-5. noise mitigation — acoustical enclosures, silencers, etc. Severance Compression Facility Noise Modeling 11 Behrens and Associates, Inc. Environmental Noise Control Table 5-4 Noise Modeling Results (:dBA.) Receptor Location Description Scenario 1 Scenario 2 Location 1 Western property line of parent parcel 35.2 32.9 Location Northern property line of parent parcel abutting nearest 41.1 38.9 resident Location 3 Northwestern property line of parent parcel 35.1 32.9 Location 4 Northwestern property line of parent parcel 35.0 32.8 Location 5 Northern property line of parent parcel 37.9 35.9 Location 6 Northeastern property line of parent parcel 38.0 35.9 Location 7 Eastern property line of parent parcel 51.8 49.9 Location 8 Southeastern property line of parent parcel 46.7 44.8 Location 9 Southeastern property line of parent parcel 45.2 43.2 Location 10 Southern property line of parent parcel 39.8 37.6 Location 11 Southwestern property line of parent parcel 35.5 33.3 Location 12 Western property line of parent parcel 36.2 34.0 Allowable Noise Level Property line of potential noise complainant 55.0 Day 50.0 Night / 55.0 50.0 Night ay i The numerical and graphical noise modeling results for Scenario 1 indicate that the predicted noise levels are expected to exceed the allowable noise limits for Weld County at Receptor Location 7 by up to 1.8 dBA. With implementation of the mitigation efforts included with Scenario 2 the predicted noise levels are expected to comply with the daytime and nighttime limits for Weld County at all modeled receptor locations. Severance Compression Facility Noise Modeling 12 Behrens and Associates, Inc. Environmental Noise Control u • L u O O O Waukesha 7044 w/ Maxim Silencer AXH 168EF w/ MAG Fan STS' -25 Acoustical Building I. I■ • ■ a� — ■ ■ ■I • S •i i'• • • • T C■` ■a/ L • a j �• •• ■ ••,■ • OP + .■ ■ a +r ire a ' ■'/ I •a + J we r • • r • • •r` i ■■ ■ t • • • • • • .I 11 + w ■ I Il • a• ■ rib-••r•Iith I a • ▪ ■ r ■I I • • ■ II i • M.•+. a },par I + vs 'a * rI 7 i ' • rIF + t I. •F • Ir' • ■ • ■ - ■I ■ . • as i I I It• • ■ ft II` • a 1 hal ■+ • • • 4 ▪ •11■ ■ s ■ ,a a ■ •• I. • ■ ■ ■ ■ I. i ■ ■ • • ■t I. ■ ■ ■ a , a.+. I► lba a• r • a FI is* MI mil } w • ■ a■ *a L% le* 4 r ! • i ■ l ■ a ■ • • • •u• + ■ a •io • ■ •• . al • a •! L ▪ ■ • • • .1 t a i__ ...ill— a .• • . pis J` MED ■ ELI I E L e LI C -sr T --1, ■ . i. + • II a IL • 0 • ! ▪ • IL a r a+ a• •a■i ■ .,• i• + 4.•• • • • r L T. C E1 e-• III III E- I E COMPRESSOR SITE $1 I ■ T I + • 4a r • l ■■ • 4■ 4 * r i ■■ • • t' • r • Ina r• • a • ■ • •■ I Is■ i • i a • + • ■ a.■ i • r a r • If ■• • anos��■■ • '. +S ■ H S ■■ +a■ 41. ER • N a te. ..p•.a a . P. I • • "1, r • U. • • + ■ • a &•. +' I a •• •! ■ II■ ■ • • • •• • .,• •• •* ▪ '• • a a •■ P a • ■ F • • `= a r • ■ I ■ ■ i+ L itr a.• •} •.. i ✓ ■ a• E , r ,Eirrib. I ▪ al - r ■ • ■ a r ■ ■ a • • ■ ■ • • • • so • • • 4. 0• J ■• •t • • • M• • i ■ a ■ I. rare �L�� PLOT PLAN me =Ton • • • • • •▪ I r • ■ • • ■ L- T r 1 —E 1 I - G - —r rrt [ en [ rt e e Ea G PL u r -. FE E E �a!*-.w 73 ay# I 1 EEr E E C R C [ a'a .I J�, .�r I ,m-:� •••rte ■•� r ET E L E C ■ . • ■ t f ■ • •�s • I1. ■ ' a • ' IL•■ + ■� IS •s ■ j I r. • r ■ U. ■ • •+■ 7 • II a ▪ ill ■ • an 1 ,• S. a h in ■ a t • 4 F ■ • a • ■• +a ! i •■ ■ •4 • •• } a ■ d e •' Iota Ma ••' ■ F H r a ■ In 'PIPa • ■a • r • ■ •■ ■ • • 1 Y ■ T .■ a ■ a .• • ■$.■ f a r ■ r ■ • C • ■• • .,'� • +• i FP• !� ■ i• ■ • • r+ SITE LOCATION I i • , ■ • 1 lit1,1 1_ W =u 14 L.1 "t,' H e 1 =LL1 tom' r Ilul' 6kl>' i 1° s" It R - f7m LET 1 _Ik.:G 4€ L•rl I F_•'.fl L •EirI'i•' WT F.=t .C ":I i - 1 d --1 ■' Lett # LC a It •G. > H°r Jle r ra•�, 1st•� EIE'E- E -ar 'L LI - 'r.-Ir' .t r. I r: E —I EP IF "=11 I Er If n.TI • 1 [ 1 1 41, KWIROCK � �"ff,I•Jr Imo MT Fotokm SEVERANCE commtessoR STATION Figure 5-4 Phase 1 Scenario 1 Baseline Mitigation LICAIMMVOITUREC ue 43111•65 I1T894rt ItMina l LIZ PLOT P LAN EMISSION SCLIRCrE EXHIBIT IBIT Pf IELIM ttartY WEIGH 16:4.c° I. a 6- E41 41 .J 9 FE l• tE 1 SEV-MP— Q 1 F Severance Compression Facility Noise Modeling 1 Behrens and Associates, Inc. Environmental Noise Control Electric Compressors AXH 156-2ZF Cooler STC-40 Acoustical Building Figure 5-5 Phase 1 Scenario 2 Proposed Mitigation U T I •TF -E I T - El 1 • ■ • ■ ■ • 1■ f x • r ■ 1 BLOT . LAM ■ E,1 IE . - a ■ muiarsi •• • •46 r r■ a '5a i a ■ r •ter •wY * •e •■ 'a• •■ . ra la • 44 a ■ •"g a ■ a 'i i rh7 • ■ • • :■ • ■■ + ■ ■ •F ' gig ; ; ■ ` a. • • ■ ` • ; • • 4 ■� a •' • ` • +!i ■tea .■. ` •� • a ■ ■ • r r4 • • +• •t • 7 i • ■! ■ 11 • was 4 ES eitIlialiMIN a. • .r • ..■. r it �• T f■ • • A Y 4 l afa M • l 't May 11r- ?4! 7'a7LLl -itt i .7LLf•-. mars 1 e L. ia1LT F� ?IINn'C 40. MOIL I'i3 E ltn "VW ICA r _ r •T•113 -ir c sa! Iry -a at 'say mat a L I • i fig .i • • e■ } Ell o1 ail r [I 1 • ■ •11‘.a E E E I (• • ■ COP PRE5 CR SITE #1 "' • "5 Ir a•A ■ • • I ■ aH • • ■ • • I ill IL` •• ■ E I M Y '■ I ` se • ■ I. 1 • • a • • RIMROCIC A IN INN q on $EIiERAN#COMP* S t}RSTAMON SITE LOCATION PLOT PLAN ASCU £CU CE. SQitB IT PRELIWWW,NCETCH Severance Compression Facility Noise Modeling Behrens and Associates, Inc. Environmental Noise Control Figure 5-6 Phase 1 Scenario 1 Noise Contour Map (dBA) Average Noise Level, Leg dBA 30.0 - 35.0 40.0 = 45.0 50.0 55.0 - 00.0 05.+0 = 70.0 = 75.0 - 80,0 85.0 90.0 0 200400 600 800 feet Severance Compression Facility Noise Modeling 15 Behrens and Associates, Inc. Environmental Noise Control Figure 5-7 Phase 1 Scenario 2 Noise Contour Map (dBA) Average Noise Level, Leg dBA _ o.0 _ 35.0 - 40.0 - 45.0 -Cr' .0 _ 55.0 - 60.0 _ 65.0 _ 70.0 _ 75.0 = 80.0 _ 85.0 - 90.0 0 200400600800 i feet Severance Compression Facility Noise Modeling 16 Behrens and Associates, Inc. Environmental Noise Control 5.4 Phase 2 Noise Modeling Results Two modeling scenarios were created for Phase 2 to investigate various options at the proposed site and are described in Table 5-5. The results of the noise modeling arc presented in Table 5-6. The locations in the tables correspond to the receptor locations identified in Figure 5-3. The results of the noise modeling are also shown as noise contour maps. Figure 5-10 shows the Scenario 1 Noise Contour Map in dBA and Figure 5-11 shows the Scenario 2 Noise Contour Map in dBA. The noise contours are provided in 5 dB increments with the color scale indicating the sound level of each contour. Table 5-5 Phase 2 Modeled Mitigation Scenarios Modeled Scenario Description Scenario 1 Baseline — Phase 1, Scenario 1 equipment compressor station Phase 2 plus compressors arc housed inside of a steel shell building with a minimum Sound Transmission per Table Class 5-1. Any doors, (STC) rating louvers, of 25. or other The compressor penetration coolers are to are to maintain be specified a minimum rating of STC 25. All other mechanical equipment does not include supplemental — Sec Figure 5-8. noise mitigation acoustical enclosures, silencers, etc. Scenario 2 STC 25 Compressor Buildings — Phase 1, Scenario 2 equipment compressor station Phase 2 compressors are housed inside of a steel shell building plus with a minimum Sound Transmission Class (STC) rating of 25. The compressor coolers arc to be specified per Table 5-1. Any doors, louvers, or other penetration are to maintain a minimum rating of STC 25. All other mechanical equipment does not include supplemental noise mitigation — acoustical enclosures, silencers, etc. See Figure 5-9. Severance Compression Facility Noise Modeling Behrens and Associates, Inc. Environmental Noise Control Table 5-6 Phase 2 Noise Modeling Results (dB. M Receptor Location Description Scenario 1 Scenario 2 Location 1 Western property line of parent parcel 35.3 33.2 Location Northern property line of parent parcel abutting nearest. 41.E 39.1 resident Location 3 Northwestern property line of parent parcel 35.2 33.1 Location 4 Northwestern property line of parent parcel 35.2 33.1 Location 5 Northern property line of parent parcel 38.0 36.1 Location 6 N orthea tern property line of parent parcel 38.1 36.0 Location 7 Eastern property line of parent parcel 52.0 50.0 Location 8 Southeastern property line of parent parcel 47.2 45.5 Location 9 Southeastern property line of parent parcel 46.1 45.3 Location 10 Southern property line of parent parcel 40.1 38.1 Location 11 Southwestern property line of parent parcel 35.7 33.5 Location 12 Western property line of parent parcel 36.3 34.2 Allowable Noise Level Property line of potential noise complainant. 55.0 Day 50.0 Night / 55.0 50.0 Night ay i The numerical and graphical noise modeling results for Scenario 1 indicate that the predicted noise levels are expected to exceed the allowable noise limits for Weld County at Receptor Location 1 by up to 2.0 dBA. With implementation of the mitigation efforts included with Scenario 2 the predicted noise levels are expected to comply with the dayti • e and nighttime limits for Weld County at all modeled receptor locations. Severance Compression Facility Noise Modeling 18 Behrens and Associates, Inc. Environmental Noise Control I I 1 I 1 Electric Compressors AXH 156-2ZF Coolers STC-25 Acoustical Building 0 DI 0 PLANT !t0RTH Itrioft -I 'NSW PUY I4fl ION CCICEMILIT WELDFFO UMW PlEhat Ma BO UTE ant Y q iINiII i6 ORME 111114 RNA 6PS1•101161f16f'e I key arailowe oft nun 11T -f C Ce-d or Is CIFiE NNW 'IMO Y41O0 9i :4e 711301I Tel Figure 5-8 Phase 2 Scenario 1 Baseline Mitigation PLOT PLAN 155x® FIE taPu.41 FEv l =%SOS OMParli r f WOW tairtNISIS SEWERANCE COMPRESSOR 5TATOR F .c-.YG'1..r as aril k C2r-7y. taw t% LOICATIO14 PLOT PLAN Ei ul:V NT LflC"AT1OW PRELWIINARY SKETCH DEW 6:1C 1bttailtl Severance Compression Facility Noise Modeling I I i 6 I I I 1 I 9 Behrens and Associates, Inc. Environmental Noise Control I Y i II I 1 l 2 Ell Electric Compressors ', - - - CI . s AXH 156-2ZF Coolers .. 1/11 lp STS'-25cous#1uilciin '• • : ' ',.�ii i I _ .' . - •.�, • - . - 7y 1 I PLANT I .�- NO H , � PLANT -_ _ 000�' � —' ,_ f1RTH I f -.. . { _ "`420o• r1 , F R m -n,. I I , I •' ' - • r � I r II li z I I COMPRESSOR Si I L #2 SLAM - • na EID J "SMOG I I 1 sue, smelt • ILJ s_ -.zed .-..• _.f A st MOM • I II U �,F•r2r.2A.e-. PEN NW k iiii.• I pi fraPI tD" fit ill I IVI 'fir Fun lai St 17V-1100 ti f a -� ei . ... C i _�: �� a =Ys �t" �li.7 !■i�ceII .5, y.g i — Ie:R9%stfit, Wit.? Apra Re r4,43 Jr a ,..I - -L l _ • t '•.; fin. .s _ III�I.a iC Sttira T� ` br r I vans • I IM Mt F [D@V.S WOO _ — . - S. iiiii I• 1 "a r nuh la Per 1 I LOCATION - ' - Y4^-J'L I— i ill — I I'■■ II _ tj • j-,, III • -.= '-i - s VUlle ,m. •I a • I - u I • �- u I �I .. r 11.0000 "` - I11I IiI�Y ILT�I�- J _ . I1 1 �x vu �� v� .o , •�._. • . I,. e. ,.• -• • G I�1 ' - ,,H I , II . I- I I • . , .,I, ' • . ." 1 oral! .[�T Ait S t II II III • .I •L ,'I _ ,...v.. =' =-1 -vim _' _ - _ a .- I WIN wan Calif CLIME 1 . q' ,SR' I A:ti iTT 1 . • - • • ... .. • . I I PLOT PLAN I II r �ry • ar•G—•�:-9 ha t-- 3a. tit! —L --.Ileac a ' 'SrI '---.IS I :ara.t�:�•jSss]r:-3— RIC Figure 5-9 Phase 2 Scenario 2 Proposed Mitigation Severance Compression Facility Noise Modeling Behrens and Associates, Inc. Environmental Noise Control Figure 5-10 Phase 2 Scenario 1 Noise Contour Map (dBA) Average Noise Level, Leg dBA a = 30.0 = 35.0 _ 40.0 - 45.0 - 50.0 _ 55.0 _ 60.0 - 65.0 _ 70.0 _ 75.0 _ 80.0 85.0 = 90.0 0 200400 600 800 feet Severance Compression Facility Noise Modeling Behrens and Associates, Inc. Environmental Noise Control Figure 5-11 Phase 2 Scenario 2 Noise Contour Map 01BA) Average Noise Level, Leg dBA 7 - 30.0 _ 35.0 40.0 _ 45.0 - 50.0 - 55.0 60.0 65.0 70.0 ■ 5.0 = 50.0 65.0 00.0 0 200400 600 800 feet Severance Compression Facility Noise Modeling Behrens and Associates, Inc. Environmental Noise Control 6. Conclusion Predictive noise models were created to represent the proposed Phase 1 and Phase 2 operations at the Severance Compression Facility operated by Rimrock Energy Partners .Noise sensitive receptor locations included in the modeling were placed in compliance with the chosen noise standards of Weld County, Colorado. Our analysis indicates that the numerical and graphical noise modeling results for Scenario 1 for both Phase 1 and Phase 2 indicate that the predicted noise levels are expected to exceed the allowable noise limits for Weld County at Receptor Location 1 by up to 2.0 dBA. With implementation of the mitigation efforts included with Scenario 2 for each phase the predicted noise levels arc expected to comply with the daytime and nighttime limits for Weld County at all modeled receptor location. Conclusion Behrens and Associates, Inc. Environmental Noise Control Appendix A - Glossary of Acoustical Terms Glossary of Acoustical Terms Behrens and Associates, Inc. Environmental Noise Control Ambient Noise The all -encompassing noise associated with a given environment at a specified time, usually a composite of sound from many sources both near and far. Average Sound Level See Equivalent -Continuous Sound Level A -Weighted Decibel Scale The human ear is more sensitive to some sound frequencies than others. It is therefore common practice to apply a filter to measured sound levels to approximate the frequency sensitivity of the human ear. One such filter is called the A -weighted decibel scale which emphasizes sounds between 1,000 and 5,000 Hertz by discounting the frequencies outside of this range. As the human ear is less sensitive to low frequency noise, the A -weighted decibel scale begins to increasingly discount noise below 500 Hertz. Measurements conducted utilizing the A -weighted decibel scale are denoted with an "(A)" or "A" after the decibel abbreviation (dB(A) or dBA). The A -weighted scale is nearly universally used when assessing noise impact on humans. C -Weighted Decibel Scale High level low frequency noise can propagate large distances from its source. Although not always audible, high levels of low frequency noise can induce vibrations in objects or structures which could become evident in ways that might be annoying to humans (e.g., rattling of windows). The C -weighted decibel scale, which was developed to estimate human ear sensitivity to high noise levels, is a flatter filter that does not discount low frequency noise as much as the A -weighted decibel scale. As a result, a C -weighted decibel measurement could be significantly higher than an A -weighted decibel measurement if the noise being measured contains a heavy low frequency content. Measurements conducted utilizing the C -weighted decibel scale are denoted with an "(C)" or "C" after the decibel abbreviation (dB(C) or dBC). C -weighted noise level limits are sometimes included in noise regulations as a way to address low frequency environmental noise issues. Community Noise Equivalent Level (CNEL) A 24 -hour A -weighted average sound level which takes into account the fact that a given level of noise may be more or less tolerable depending on when it occurs. The CNEL measure of noise exposure weights average hourly noise levels by 5 dB for the evening hours (between 7:00 pm and 10:00 pm), and 10 dB between 10:00 pm and 7:00 am, then combines the results with the daytime levels to produce the final CNEL value. It is measured in decibels, dbs. Day -Night Average Sound Level (Ldn) A measure of noise exposure level that is similar to CNEL except that there is no weighting applied to the evening hours of 7:00 pm to 10:00 pm. It is measured in decibels, dB. Glossary of Acoustical Terms Behrens and Associates, Inc. Environmental Noise Control Daytime Average Sound Level The time -averaged A -weighted sound level measured between the hours of 7:00 am to 7:00 pm. It is measured in decibels, dB. Decay Rate The time taken for the sound pressure level at a given frequency to decrease in a room. It is measured in decibels per second, dB/s. Decibel (dB) The basic unit of measurement for sound level. Direct Sound Sound that reaches a given location in a direct line from the source without any reflections. Divergence The spreading of sound waves from a source in a free field, resulting in a reduction in sound pressure level with increasing distance from the source. Energy Basis This refers to the procedure of summing or averaging sound pressure levels on the basis of their squared pressures. This method involves the conversion of decibels to pressures, then performing the necessary arithmetic calculations, and finally changing the pressure back to decibels. Equivalent -Continuous Sound Level (Leq) The average sound level measured over a specified time period. It is a single -number measure of time - varying noise over a specified time period. It is the level of a steady sound that, in a stated time period and at a stated location, has the same -weighted sound energy as the time -varying sound. For example, a person who experiences an Leq of 60 dB() for a period of 10 minutes standing next to a busy street is exposed to the same amount of sound energy as if he had experienced a constant noise level of 60 dB(A) for 10 minutes rather than the time -varying traffic noise level. It is measured in decibels, dB. Fast Response A setting on the sound level meter that determines how sound levels are averaged over time. A fast sound level is always more strongly influenced by recent sounds, and less influenced by sounds occurring in the distant past, than the corresponding slow sound level. For the same non -steady sound, the maximum fast sound level is generally greater than the corresponding maximum slow sound level. Fast response is typically used to measure impact sound levels. Field Impact Insulation Class (FIIC) A single number rating similar to the impact insulation class except that the impact sound pressure levels are measured in the field. Glossary of Acoustical Terms Behrens and Associates, Inc. Environmental Noise Control Field Sound. Transmission Class (FSTCJ A single number rating similar to sound transmission class except that the transmission loss values used to derive this class are measured in the field. Flanking Sound Transmission The transmission of sound from a room in which a source is located to an adjacent receiving room by paths other than through the common partition. Also, the diffraction of noise around the ends of a barrier. Frequency The number of oscillations per second of a sound wave Hourly Average Sound Level (HNL) The equivalent -continuous sound level, Leg, over a 1 -hour period. Impact Insulation Class (IIC) A single number rating used to compare the effectiveness of floor/ceiling assemblies in providing reduction of impact -generated sound such as the sound of a person's walking across the upstairs floor. Impact Noise The noise that results when two objects collide. Impulse Noise Noise of a transient nature due to the sudden impulse of pressure like that created by a gunshot or balloon. bursting. Insertion Loss The decrease in sound power level measured at the location of the receiver when an element (e.g., a noise barrier) is inserted in the transmission path between the sound source and the receiver. Inverse Square Law A rule by which the sound intensity varies inversely with the square of the distance from the source. This results in a 6dB decrease in sound pressure level for each doubling of distance from the source. Ln Percentile Sound Level The noise level exceeded for n% of the measurement period where n is between 0.01% and 99.99%. Usually includes a descriptor i.e. A -weighting. Common Ln values include LA►.10, L 50, and LA9O levels. L 10 would represent the A -weighted sound level that is exceeded for 10% of the measurement period. Masking The process by which the thresholdof hearing for one sound is raised by the presence of another sound. Maximum Sound. Level (Lmax) The greatest sound level measured on a sound level meter during a designated time interval or event. Glossary of Acoustical Terms 27 Behrens and Associates, Inc. Environmental Noise Control NC Curves (Noise Criterion Curves) A system for rating the noisiness of an occupied indoor space. An actual octave -band spectrum is compared with a set of standard NC curves to determine the NC level of the space. Noise Isolation Class (NIC) A single number rating derived from the measured values of noise reduction between two enclosed spaces that are connected by one or more partitions. Unlike STC or NNIC, this rating is not adjusted or normalized to a measured or standard reverberation time. Noise Reduction The difference in sound pressure level between any two points. Noise Reduction Coefficient (NRC) A single number rating of the sound absorption properties of a material. It is the average of the sound absorption coefficients at 250, 500, 1000, and 2000 Hz, rounded to the nearest multiple of 0.05. Normalized Noise Isolation Class (NNIC) A single number rating similar to the noise isolation class except that the measured noise reduction values are normalized to a reverberation time of 0.5 seconds. Octave The frequency interval between two sounds whose frequency ratio is 2. For example, the frequency interval between 500 Hz and 1,000 Hz is one octave. Octave -Band Sound Level For an octave frequency band, the sound pressure level of the sound contained within that band. One -Third Octave The frequency interval between two sounds whose frequency ratio is 2/11/3). For example, the frequency interval between 200 Hz and 250 Hz is one-third octave. One -Third -Octave -Band Sound Level For a one -third -octave frequency band, the sound pressure level of the sound contained within that band. Outdoor -Indoor Transmission Class (OITC) A single number rating used to compare the sound insulation properties of building facade elements. This rating is designed to correlate with subjective impressions of the ability of facade elements to reduce the overall loudness of ground and air transportation noise. Peak Sound Level (Lpk) The maximum instantaneous sound level during a stated time period or event. Pink Noise Noise that has approximately equal intensities at each octave or one -third -octave band. Glossary of Acoustical Terms Behrens and Associates, Inc. Environmental Noise Control Point Source A source that radiates sound as if from a single point. RC Curves (Room Criterion Curves) A system for rating the noisiness of an occupied indoor space. An actual octave -band spectrum is compared with a set of standard RC curves to determine the RC level of the space. Real -Time Analyzer (RTA) An instrument for the determination of a sound spectrum. Receiver A person (or persons) or equipment which is affected by noise. Reflected Sound Sound that persists in an enclosed space as a result of repeated reflections or scattering. It does not include sound that travels directly from the source without reflections. Reverberation The persistence of a sound in an enclosed or partially enclosed space after the source of the sound has stopped, due to the repeated reflection of the sound waves. Room Absorption The total absorption within a room due to all objects, surfaces and air absorption within the room. It is measured in Sabins or metric Sabins. Slow Response A setting on the sound level meter that determines how measured sound levels are averaged over time. A slow sound level is more influenced by sounds occurring in the distant past that the corresponding fast sound level. Sound A physical disturbance in a medium (e.g., air) that is capable of being detected by the human ear. Sound Absorption Coefficient A measure of the sound -absorptive property of a material. Sound Insulation The capacity of a structure or element to prevent sound from reaching a receiver room either by absorption or reflection. Sound Level Meter (SLM) An instrument used for the measurement of sound level, with a standard frequency -weighting and standard exponentially weighted time averaging. Glossary of Acoustical Terms Behrens and Associates, Inc. Environmental Noise Control Sound Power Level A physical measure of the amount of power a sound source radiates into the surrounding air. It is measured in decibels. Sound Pressure Level A physical measure of the magnitude of a sound. It is related to the sound's energy. The terms sound pressure level and sound level are often used interchangeably. Sound Transmission Class (STC) A single number rating used to compare the sound insulation properties of walls, floors, ceilings, windows, or doors. This rating is designed to correlate with subjective impressions of the ability of building elements to reduce the overall loudness of speech, radio, television, and similar noise sources in offices andbuildings. Source Room A room that contains a noise source or sources Spectrum The spectrum of a sound wave is a description of its resolution into components, each of different frequency and usually different amplitude. Tapping Machine A device used in rating different floor constructions against impacts. It produces a series of impacts on the floor under test, 10 times per second. Tone A sound with a distinct pitch Transmission Loss (TOO A property of a material or structure describing its ability to reduce the transmission of sound at a particular frequency from one space to another. The higher the TL value the more effective the material or structure is in reducing sound between two spaces. It is measured in decibels. White Noise Noise that has approximately equal intensities atall frequencies. Windscreen A porous covering for a microphone, designed to reduce the noise generated by the passage of wind over the microphone. Glossary of Acoustical Terms From: Ben Frissell Sent: Tuesday, October 23, 2018 7:51 AM To: Kim Ogle c kogl e@w e l dgov. co m> Subject: Rimrock Noise Modeling Report USR18-0090 Kim, It appears that the facility for USR18-0090 can meet the residential noise standard. The facility shall comply with their outlined scenarios in the Noise Modeling Report dated October 17, 2018. Let me know if you have any questions or need additional information. Thank you, Ben Frissell Environmental Health Specialist Waste Program Coordinator Weld County Department of Public Health and Environment 1555 North 17th Ave, Greeley bfrissell@weldgov.com 970-400-2220 tiott Ty, ash lape PHAB • ,t pa ANS Sow NTA" s (TETFATECH TECHNICAL MEMO To: ✓Anne Johnson From: Gene Coppola PE Date: July 25, 2018 Subject: NWC/REP Compressor Facility Traffic Narrative I am writing to address the traffic impacts of the proposed natural gas compressor station to be located near the communities of Ault and Severance in unincorporated Weld County. The proposed facility is located in part of the northwestern quarter of Section 8, Township 7 North, Range 66 West. The facility will be accessed off of W C R 27 south of WCR 84. An alternative access point is from the north off of WCR 84 east of WCR 27. Construction will last from 4-5 months with construction traffic peaking at 30 passenger vehicles and 4 trucks per day. Once operational, the facility will generate 2-3 passenger vehicles and 3 trucks per week. This equates to an average of one vehicle per day. Most site traffic is expected to use CR 27 to reach State Highway► 14. At State Highway 14, traffic will head east or west. The latest available average daily traffic (ADT) on CR 27 was provided by Weld County. With permanent operations, the combination of background traffic plus site traffic is estimated as shown below. Roadway CR 27 Section South of CR 84 Recent ADT 14 Site ADT 1 Total ADT 15 CR 27 is a gravel road with State Highway 14 being paved. Given the anticipated future traffic levels, site traffic can be easily served by the existing roadway system. Consequently, no roadway improvements are needed with the proposed Compressor Facility. Please contact me if you have any questions. libit„s, ENERGY PARTNERS IMROCK Severance Compressor Facility Weld County, Colorado Land Use Permit: USR18-0090 October 30, 2018 Contact: Dan Young (970) 539-2016 Rimrock Energy Partners (REP) is committed to designing, constructing and operating a safe facility. The development of this Communications Plan is to ensure activities at the Compressor Facility are communicated with the public. The following narrative describes the objectives and activities to occur at the REP Severance Compressor Facility. Objectives: 1. Develop and Maintain Relationships with key Stakeholders. REP will develop and maintain a list of key stakeholders including their names, addresses, email addresses and telephone numbers to ensure a connection is made prior to construction and during operation. By doing so, REP will provide the first contact and open the path for future communication Stakeholder Information and Education. Through regular outreach, REP will strive to educate stakeholders regarding operating procedures, emergency preparedness, community and industry benefits. Transparency. REP will identify opportunities to allow stakeholders to access relevant information and provide comments. Communications Activities 1. Communication Options. Response Line: 1(800) 380-4165 and Email: info@rimrockenergy.com_ REP will establish a dedicated response line and email account. The response line will route the caller to an assigned employee during office hours to answer questions. During off -hours, the response line calls will be routed to the Pierce Plant control center that is staffed 24/7. Additionally, an email address will be provided to allow stakeholders to email their questions. A. response from REP will be provided within 24 hours during the week. 2. Emergency Calls. The facility sign will direct stakeholders to call 911. The Response Dine will also encourage stakeholders to dial 911 in the event of an emergency. 3. Community Meetings. Should community meetings be held for the REP Pierce Natural Gas Processing Facility, stakeholders for the Severance Compressor Facility will be included. 4. Emergency Responder Communications. Prior to even submitting a land use application to Weld County, REP met with the Weld County Office of Emergency Management, the Au It -Pierce Fire Protection District and the Ault Police Chief. Direct and open communication with these agencies will continue through the construction and operation of the facility. EMEaSON. APPLETON' John Velinaki Appleton Group Email Address: j ohs e ve i inski@emerson.com Lighting Layout inbox: appcLpelightinglayout@emersonscom REPORT NUMBER: LA 180345 REVISION: EEO PROJECT NAME: KAHUNA - SEVERANCE FIXTURE SERIES: AREAHASTER GEN 2 LED CATALOG: AMLGL6WF7B11 OR ANLGL7 F7 BU with AMIGV Visor MOUNTING HEIGHT: 20 FT PREPARED FOR: Mark Freeman PREPARED BY: John Velinski, Application Engineer November 150 2018 Revision: 1 AGI.3≥ - Copyright 1999-2018 by Lighting Ana1ystso Inc. ich File; 1 160345 AGI Calculations based or piib l robed IFS Method, .and r ecommend at i ons r values rounded for display purposes Results derivs k from content of manufacturers photometric tile. 12/1512018 EMERSON. APPLETON Luminaire Definition (s) L-14 AMLGLEWF7BU W/AMLGV Filename L umens Per Lamp Number of Lamps Total Lamp Lumens Arrangement Lamp Lumens Arrangement Luminaire Lumens L uminaire Lumens L uminaire Efficiency (%) Lamp Lumen Depreciation (LIA O Total Light Loss Factor Luminaire Watts Arrangement bilatts Arrangement Arm Length Offset Road Classification Indoor Classification LEE Flood NE, Type Lea AM GL7WF7 Bt-AMLGV Filename Lumens Per Lamp Ter of -Lamps Total Lamp Lumens Arrangement Lamp Lumens Arrangement L 'rare Lumens Luminaire Lumens Luminaire Efficiency (%) Lamp Lumen Depreciation (LLD) Total Light Loss Factor Luminaire Watts Arrangement Watts Arrangement Arm Length Offset Road Classification Indoor Classification LER Flood NEMA Type L-3 AMLGL7WF7BU-AMLGV (3X @ 90 Deg) IAMLG- LG L6WF7BU- LGV 2018-Octoher-3'roductiO1 N .A. 1 NwA, N .A. 4g38 4838 0300 0.900 70,6 70.6 SINGLE 0 0 N.A., N.A N.A. 69 7H x 01 N. A. (deprecated} IAMLG- !IL� L714F7i BU-AMLGV 2018-Septe er-28 Produci 1 N.A. 7 097 7097 N.A.. y0.900 0.900 107.4 107.4 SINGLE U 0 N .A., C , i . , N z . (deprecated) N .A. 66 7H. x 6V 2 AiA3Copyright 1999-2016 by Li.gbttng Analysts, Inc. Job File: L1k1R034.5.ACI Calculations basal an publi,ahad TES HethDda and ,recommendations, va1ies rounded for cii.splay purposes. Results derived from conteaat of man factures photometric silo. 4 EMERSON,. APPLETON Luminaire Definition (s) - Cont. Filename Lumens Per Lamp Number of Lamps Total Lamp Lumens Arrangement Lamp Lumens Arrangement Luminaire Lumens Luminaire Lumens Luminaire Efficiency (%) Lamp Lumen Depreciation (LLD) Total Light Loss Factor Luminaire Watts Arrangement Watts Arrangement Arm Length Offset Road Classification Indoor Classification LER Flood NEMA Type L-4 AMLIGL7WEIBU-AMIGV (4X @ 90 Deg, Filename Lumens Per Lamp Number of Lamps Total Lamp Lumens Arrangement Lamp Lumens Arrangement Luminaire Lumens Luminaire Lumens Luminaire Efficiency (%) Lamp Lumen Depreciation (LLD) Total Light Loss Factor Luminaire Watts Arrangement Watts Arrangement Arm Length Offset Road Classification Indoor Classification LER Flood NEMA Type I LG-AMLG L7WFIBU-AML \ 2018 -September -2B Product N.A. N.A. N.A. 21 2 91 7 097 N.A. 0.900 04900 107.4 322.2 3 @ 90 DEGREES 1 0 N . . r N.A., N.A. (deprecated) 66 711 x 6V r ANLG LG L7WF7 BTU-, LGV 2018 -September -28 Product L9 L W ■ I N.A. .A 28368 7 097 N.A. 0.900 0.900 107.4 429.6 4 @ 90 DEGREES 0 P. . p N.A., r N.A.(deprecated) N.A. 66 JP_ x 6V 3 2132 '- Copyright 1999-206 by Ltgtting Analysts, inch. Onb !Mel LA18O345.AGJ Calc4Ufttons based 0174 puali€hed IES .Mathod and recommendations, nnliies -rounded for display purposes. R.esutt© derived from content of manufacturers photoR.etri tile, 11/15,120,19 1iedule Description APILGL6;WE'7 U tiliAMLGV AMLGL7wFTBu-ArrLcv AMLGL7WF7 BU- LGV (3 @ 90 beg) CI ci p to en Oil --,.r LW H I a m W t--- r W N'` r� V t4 Total Lamp Lunn LLF 0 0 al a a 0 0 al • 0 0 0 crl ■■ 0 0 O CP. a 0 • I Z a e z r • . z e M z lelpp7� U) 10 'V 17 03 4 114 it I -- kit) a 14 SINGLE 14 0 H z VI I 3 8 90 DEGREES 4 @ 90 DEGREES RID ri I r I kI I rn I pr -I 4' M ii -1 >e 4-1 0 H 41 Ca O raf ti 4V C'd a ;O"' A 4 (13 4 E F 4 IV• oce it4 c r Z Z. 0 0 el 0 OFy IN XPIN l II F} Ft 4.1 I sri 0 ' ED iN in ■ I , ■ r 0 C.. 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Si t. to tw L S- L 4r '1-s le L Si 't■ EM ERSON APPLETON r a_A 1.1 I I •-.1 -4 ♦ P. iF" , iJ •".: "`C3 r ''dt calcf 00 '..1 ¢r' t=4* rib:arinse- l !J ^gip -Lf �� ]I� WI► �. tlw I 4. Mr LB a�! Illuminance (Fe) From: Tom Krupa <TKrupa@Kahu naUSA.com> Sent: Friday, November 16, 2018 9:32 AM To: Kim Ogle <kogle@woldgov.com>; Johnson, Anne <Anno.iohnson@tetratech.com> Craig Ludwig cCLudwig@Kah u naUSA.com>; Daniel Young <d.young@ri mrockenergy.com> Cc: Craig Ludwig <CLud ig@KahunaUSA.com>; Donald Cherry <DCherry@KahunaUSA.com> Subject: RE: Rimrocl - Severance Compressor Station Lighting Permit Package Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Kim, The proposed lighting plan will meet all of these standards. All lighting fixtures will have visors as stated in the notes on the Kahuna lighting details drawing. All mounted lighting fixtures are to be mounted such that the pitch is 90 degrees with the mounting structures. This will prevent beams or rays of light from shining directly onto adjacent properties. We will be using LED lighting fixtures with a 3000K color temperature rating. This is the lowest color temperature rating achievable for industrial lighting and presents a softer and dimmer light source. The combination of the color temperature rating, the 90 -degree orientation, and the added visor will prevent nuisance to adjacent properties and any confusion for nearby operators of motor vehicles. No colored lights will be used for lighting the facility. All site lighting will only be used at night for an emergency and rare maintenance needs. It is not anticipated that this will occur regularly. In all other cases, all site lighting will be off. We did receive the lighting study this morning. Please use the attached lighting study from Appleton as a supplement to our lighting permit package. This specifies the lighting fixture model numbers. Torn Krupa Mobile: 484-798-1156 Office: 720-889-4071 From: Kim Ogle <kogle@weldgov.com> Sent: Friday, November 16, 2018 5:10 AM To: Tom Krupa <TKrupa@KahunaUSA.com>; Johnson, Anne cAnne.Johnsan@tetratech.com>; Craig Ludwig <CLudwig@KahunaUSA.com>; Daniel Young <d.young@rimrockenergy.com> Cc: Craig Ludwig <CLudwig@KahunaUSA.com>; Donald Cherry <DCherry@KahunaUSA.com> Subject: RE: Rirnrock - Severance Compressor Station Lighting Permit Package Tom Will the proposed lighting plan meet or exceed this standard? "Sources of light shall be shielded so that beams or rays of light will not shine directly onto adjacent properties. Sources of light should not cause a nuisance or interfere with the use on the adjacent properties in accordance with the map. Neither the direct, nor reflected, light from any light source may create a traffic hazard to operators of motor vehicles on public or private streets. No colored lights may be used which may be confused with, or construed as, traffic control devices" The plant is sited on a knoll above surrounding properties to the southwest and southeast. The adjacent property owner to the northwest and nearest neighbor has submitted two lighting complaints for adjacent facilities. As I stated on Tuesday, neighbors are familiar with little to no light coming from this field, this facility will change the scenario. If the pole mounted lighting is operational in cases of night-time emergency only, and not a part of the nightly lighting plan, we could be supportive. Please advise. Kim Ogle Planner Weld County Planning Services 1555 N o rt'h 17th Ave n u e Greeley, Colorado 80631 970.400.3549 Direct 970.353.6100 x 3540 Office kogleweldgov.cem From: Tom Krupa <TKrupa@KahunaUSA.com> Sent: Thursday, November 15, 2O18 7:02 PM To: Kim Ogle <kogle@weldgov.com>; Johnson, Anne ne.Johnson@tetratech.com›;<An Craig Ludwig cCLudwig@Kah u naUSA.com>; Daniel Young cd.young@ri mrockenergy.com> Cc: Craig Ludwig <CLudwig@KahunaUSA.com>; Donald Cherry <DCherry@KahunaUSA.com> Subject: Rimrock - Severance Compressor Station Lighting Permit Package Caution: This email originated from outside of Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. H el o Kim, Please find the attached lighting package for the Rimrock Severance Compressor Station. We anticipate receiving the revised Ail lighting study tomorrow. We are submitting this package and will forward the study once received. The attached package includes all of the necessary details and notes that adhere to the standards as discussed on Tuesday's phone call. The lighting study will act as a supplement to this package but, does not necessarily need to be included. Thank you, Tom Krupa Staff Electrical Engineer V4. KAHUNA 11400 Westmoor Circle, Suite 325 Westminster, Co 8OO21-2579 720-889-4071 (Direct) 484-798-1156 (Mobile and SMS) 303-451-7374 (Main) TKrupa@KahunaUSA.com www.KahunaUSA.com Please take note of Kahuna's new web and email addresses and update your contacts. This communication, including attachments, is for the exclusive use of addressee and may contain proprietary, confidential or privileged information. If you are not the intended recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return email and delete this communication and destroy all copies. W yJY! a 6 FS z 2 x B B a 0 0 0 WC n ti O V a F g N. 80U' -o - PLANT NORTH N. 7170'- D - N. 6GJ'- D' ROAD PIG REQEH{R Gil N- 50(1 -0 - ROAD J 8 cp W FlG LAVIE.HER FEFfaiN r I 5 _ IJS1RULIENT AR SKID O I I I I 1 I 5 -PHASE SEPARATOR CCKOENsATE Kt RUMP Pcencill o C OILEWSAIE SIgORAGE lax GGEE lax FULL CA4 SCRUBBER 0 sue FUR GA5 SKID WNW [yB�11Iy1(E�RP4��'' K�AP Q; @ R VIEK SKID SK-6:21Ir. N U TRUCK LOADING {I NGC got E iRDL L U SLUG CATCHD I 5619 DISCARC' COALESCING FILTER lEG CGtJ1 CEIR l Jr :Co 8 N W GCAMR[SSCR SKID Male AP P COWPQESSOQ 5K16 GOWIRESSOR SKID MgeG hE6 EEGEN SID QJI; L P LTASUSIDR KO D I H.P.tOUAU5TLR KU' CGYBU 1DR COMPRESSOR SOD (FUTURE) COMPRESSOR SITE #1 1 CONPREg56R SKV °, 1 4 8 W ROAD f VIP- CA►13U5TOR IN t I rbi ui r L. —a— L I I I I I I L14 PLO FLAN SCALE i r r L L EVE rx 1, THIS PLOT PLAN HAS BEEN CONCEPTUALLY DEVELOPED UTILIZING PRELIMINARY VENDOR AND 51TE INFORMATION, AND IS SUBJECT TO CHANGE WHEN FINAL INFORMATION IS RECEIVED. 2- PLANT COORDINATE BASE POINT OO-*- E- 04"-r Al: AI' CORNER CS THE SUPPLIED SURVEY COMPATTEIILJTY CONCERNS TItL SE MNIMLZS MY THE FACT THAT THE PACILRY WILL GEN9IATE A MINIMAL AMOUNT OF TRAFFIC. LIGHT IMPACT, 'RILL BE MINIMIZED E.Y HAYING ',UST ONE SECURITY LJNHT AT THE ENTRANCE TO THE FACILITY AND A FGM OTHER KET RISHER VALUE LOCATION;! WITHIN THE FACILITY TO YIN$EZE OFF. 817E LICTHT POLLUTION. ALL OTHER LIGETE ON THE SITE ARE OPNkATlONAL LIGHTS THAT WALL ONLY BE WAND ON IF E7PIPLDYEES N® TO SE ON- ant WHEN R IS DARK; HOWEVER, A IN NOT ANTICIPATED THAT HUB WILL OCCUR REGULARLY. REFEREN,'.E DRALi1NG5 REVISIONS Dwc NC% TrRE 4 A Np FOP INIORMATIQN FOP INIDPLIATION DESERPTION ers wAvhr IK HRIJt� fir Jr aelt�Va � alrvAr CNr SPAR. CAVE DAZE RIMROCK `. ENERGY PARTNERS SEVERANCE COMPRESSOR STATION ELECTRICAL LIGHTING LOCATION OVERALL PLAN 514 RAMMAYENTUREI tic wt-wr MINSTER.. Co e002 I 305.45 I -7574 DT: K&HLNA AESI ]N LLC. plum 8Y: a 51AC.G5 CNECKEDs L KRUPA APPROVED: D. CHERRY CRE&TITJN con 08/D6/1B CHECK DATE; 59/09/18 APPR. DATE; Q8/09/18 PI 01 ND,: dQ$5-4551-DO SCALE 1' — 2C-0' upr'' tEV-EE-7710© RG SHEET No. T OF Z pwr 11t1E/CATE Ortc t l& tole BY: Wdty Pahtsienko oo1nhL Ala R LIGHT ANGLED 45' DOWNWARD SUP FITTING ADJUSTABLE MOUNT -S BREAK OVER LIGHT POLE LOWERING DEVICE (OPTIONAL) Mr. GROUND LUG IN POLE LIGHT ANGLED 45' DOWNWARD SLIP FlT11NG ADJUSTABLE MOUNT .__,./— SFITTING• ADJUSTABLELIP MOUNT (2 DIAMETER PIPE O (2 LIGHT BULLHORN) BREAK OVER LIGHT POLE LOWRING DEVICE (OPTIONAL) Y GROUND LUG IN POLE - LIGHT ANGLED 45' DOWNWARD SUP FITTING ADJUSTABLE MOUNT -v o FITTING ADJUSTABLE MOUNT ADJSUPUSTABLE 2' DIAMETER PIPE (3 LIGHT BULLHORN) BREAK OVER LIGHT POLE LOWERING DEVICE (OPTIONAL) k! GROUND LUG IN POLE - LIGHT ANGLED 45' DOWNWARD SLIP FITTING ADJUSTABLE MOUNT a !, SUP FITTING ADJUSTABLE MOUNT 2' DIAMETER PIPE (4 LIGHT BULLHORN) BREAK OVER LIGHT POLE LOWERING DEb10E (OPTIONAL) GROUND LUG IN PCLE PERM -. PARKING LOT SURFACE 4R FINISHED GRADE a . I `J REBAR PARKING LOT SURFACE OR FINISHED GRADE t ` \ . `y MAR PARKING LOT SURFACE OR FINISHED GRADE -1 J• . i REBAR PARKING LOT SURFACE 4R FINISHED GRADE o `J 1 . .S -mss✓ ' �/ .i ..• 0=, tlE J W .l' .. -'.. t�{ 11. 2 ., /�e"...\rte \',.- ' .,/,‘.....,-/x 1 —Jo_ �� .. i d y *ter }-S l / '•`LE J �a W 1 .3 .. .. '/-.. � • —E J W �� - 300 MIN. BELOW GRADE PVC TO RCS TRANSITION ° ' " :. �sKsu N PVC - 3D' HIM. BELOW GRADE PVC TO RCS TRANSITION Y.: .. J. ''.' . a $ �g en La.1 PVC - 30" MIN. BELOW GRADE PVt TD RCS TRANSITION ° t =5 PVC - 34 MIN. BELOW GRADE PVC TO RC$ TRANSITION .' " " .-.�_� se•PVC ;, a= En s L-1 SINGLE LIGHT POLE BASE ON GRADE OR FINISH SURFACE L-2 TWO LIGHT POLE BASE ON GRADE OR FINISH SURFACE L-3 THREE LIGHT POLE BASE ON GRADE OR FINISH SURFACE L-4 FOUR LIGHT POLE BASE ON. GRADE OR FINISH SURFACE SCALE: NONE SCALE: NONE SCALE: NONE SCALE: NONE UGH1 ANGLED 45' DOWNWARD SUP FITTING ADJUSTABLE MOUNT 2" SCHEDULE BO PIPE NIO 2%' U BOLT, 3 ,� I <; LIGHT VNWARAMID 45' DC3NN11AAD SUP FITTING ADJUSTABLE{2 MOUNT 2" SCHEDULE BD PIPE N 2%' U BOLT, 3' THREAD f f .n� _ �I I 2" DIAMETER PIPE LIGHT BULLHORN) TYPICAL PIPERACK LIGHT ANGLED 45' DOWNWARD {LIP FITTING ADJUSTABLE MOUNT 2" SCHmULE 84 PIPE r� I N - - 2 U BiOHREAD f • ' SASS S1 ■ I sn I 2" DIAMETER PIPE (3 LIGHT BULLHORN) TYPICAL PIPERACK LIGHT ANGLED 45 DOWNWARD SLIP FITTING ADJUSTABLE MOUNT 2" SCHEDULE 80 PIPE �� I N , /' • yr 7 2" DIAMETER PIPE (4 LIGHT BULLHORN} I I THREAD i TYPICAL PIPERACK 2a U BOLT, •3 THREAD �1`Y ■ "" I TYPICAL PIPERACK L-5 SINGLE LIGHT PIPE RACK MOUNTED L-4 TWO LIGHT PIPE RACK MOUNTED 1-7 THREE LIGHT PIPE RACK MOUNTED L-8 FOUR LIGHT PIPE RACK MOUNTED SCALE NONE SCALE NONE SCALE: NDt1E $CAVE NONE NOTES: I. ALL POLE MOUNTED SITING FIXTURES SE TO 8E MOUNTED SUCH THAT THE PITCH IN SO DEASREE4 M 111 THE MOUNTIN4 4TRUCTUREQ. POLE MOUNTED Loma FI7fUTfEB WEL INCLUDE A VISOR ATTACHMENT MD WILL BE POINTED DIRECTLY TTY MRDS THE MOUND. THESE DETAILS ARE TO INDICATE THE YARKxIN MOUNTING OPTIONS FOR LIGHTERS FORURFa.�•DETAILS REFERENCE DR.AWINCZ REVISIONS • ELECTRICAL LIGHTING _'' r '� o f f mfr ! ��UC WESTMINSTER. CO $O021 RAN BY: - CHECKED: - APPROVED: - !� Ll r mama.: DATE: D1/MtI3 CHECK DATE:— AFAR. DATE: — /� a. FOR INFO@AAIION j j j Praj, Na: - rms. �,: STD SHEET No. KAHLNA DESIGNLLC. BY: KA 5 A DESIG OW. Kt- , �,p„p,, � D1s1E cHty DATE �rn" DATE -EE -70015 1 OF 1 SCALE — C n a r n w In x 0 m re W N 2 2 0 w { 12 X l ` - P ,00 : r`- ..v PENDANT ATTACHED O .. Xll ..-."•a ..---- ----- l Cp X -- M -' ''l r� e" .„..-000.••• . '`� cete ..��.0! O ! ""� �� BEAM TYPICAL PIPE RACK —7/171 h, �X _ PENDANT UGHT ATTACHED TO WALL `-.-. f '--4 !'"!� --`�" "---..! `� EMERGENCY ENT WALL PACK LIGHT t .. SLIP ANL,STABLE 2' DIAMETER (2 LIGHT BULLHORN) SLIP FITTING ADJUSTABLE OVERHEAD BEM JX �. ate" �a f PITHG IdOUNT PIPE MOUNT {,{ — .-•- aaa x._45,, JX rX JX - ` LIGHT ANCI..ED 45 DOWNWARD •�"�• LIGHT TO CROSS L-9 PENDANT LIGHT ATTACHED TO CROSS BEAM L-10 PENDANT LIGHT ATTACHED TO WALL L-11 EMERGENCY EXIT WALL PACK LIGHT L-12 TWO LIGHT CEILING MOUNTED SCALE: NONE SCALE: NONE SCALE: NONE SCALE NONE r fr 0:00. O"P _a..., f r 1�"F' ......--,e.'''. -- FLUORESCENT LICHr OP O"P } �p X r`� r ve X e d" se t. .+""' r`rt • N. _ _ • r�X~ .�^. /� rf` / r fr F1PE RACK MOUNTED UGHT yf r Jf p, WALL MOUNTED UGHT L-13 FLUORESCENT LIGHT L-14 WALL MOUNTED LIGHT L-15 PIPE RACK MOUNTED LIGHT L-16 UNDEVELOPED SCALE: NONE SCALE NONE SCALE NONE SCALE: NONE NOTM I. ALL POLE MOUNTS) LAIHITIN( PICTURES ARE TO HE MOUNTED *MOH THAT THE ARCH it YO DeaZMIT' TIE MQUNTINO STRUCTURE& POLE MOUNTED UQNTING MOMS WILL INC LIME A VISOR ATTACHMENT AND WILL DE POINTED DIRECTLY TOWARDS THE GROUND. THESE DETAILS ARE TO INDICATE THE VARIOUS MOUNTING OPTION. LIMINGFIXTLlNE^iL REFERENCE DRAWINGS REVISIONS - ELECTRICAL LIGHTING DETAILS . �r /f � r I VJC�affw11fi„r„. w A T`'A 'W% u4 CO ao021 IAHUNADESIGl KAHUNA DL3I6NLLC. DRPM1 BY; - CHECKER - APPROVED - } CREAlICN CATE! 01/19/58 CHECK DATE:— AFAR. COTE: — FOR INFUFAIAIION `y � �! Pro). ND.: -NI t Ny.:STD-EE-?OQ16 SHEET F 1 A OM. ND. TITLE rho. oesrApnorr 1 p�� Crr` TE aq�0�{� AF -19>- - ;3Y 9Y: SCALE: — t v S ral a w HAZARDOUS AREAMASTERTM GENERATION 2 LED • Three lumen outputs provide up to 19500 lumens. • Choice of optics for optimal light distribution in a variety of applications. • Separate field wiring compartment with screw terminal block for easya nd secure connection (can accept UL/CSA 26-10AWG). • Two W NPT entries provided. • Yoke bracket is designed to accommodate traditional Area master brackets and slipfitters for easy retrofit. • Choice of color temperature (CCT): 5000K cool white or 3000K warm white. • Rugged and compact housing with superior thermal design translates to long luminaire life. • Heavy duty, high temperature silicone rubber gaskets. • Thermal shock and impact resistant clear or frosted glass lens. • Standard 6 KV surge protection. • Captive fasteners secure one piece lens. • Field replaceable LED driver and lens cover. SUITABLE LOCATIONS • Enclosed and gasketed fixtures suitable for use in: A wide range of industrial, chemical processing and other areas where flammable gases and vapors are present, for example Oil and Gas Refineries Petrochemical Plants Foundries Drilling Rigs Pulp and Paper Mills Food and Beverage Processing Facilities Loading Docks Power Plants Water and Wastewater Treatment Facilities Other areas where corrosive, wet, dirty and tough environments are a problem • IP66/IP67, Type 4X, marine and wet locations • Locations requiring dependable, consistent lighting in extreme hot/cold temperature environments. -40 °C to +65 °C (-40 °F to +149 °F) a mbient temperature range For product information: www.appletonelec.com f [� 1.800.621.1506 STANDARD MATERIALS • Housing and lens door: copperfree (4/10 of 1% max.) aluminum • Gaskets: silicone rubber • Yoke: zinc plated HR steel • Bolts: stainless steel • Close up plugs: (1) aluminum provided • Guard and safety cable: stainless steel • Visor: Aluminum STANDARD FINISHES • Housing, lens cover and yoke mount: architectural bronze polyester OPTIONS • Improved safety cable design with multiple retention points, purchase separately • Guard and visor available, purchase separately • Slip -fitters and mounting brackets available for easy pole or wall mounting • 10KV Surge Protection • Metric M20 thread adapter RELATED PRODUCTS • Round Tapered Steel Poles • Hinged Steel Poled • Square Tapered Steel Poles • Square Steel Poles • Floodlight Mounting Brackets NEC JCEC RATINGS • Class I, Division 2, Groups A, B, C, D • Class I, Zone 2 Group IIC • Class II, Division 1 and 2, Groups E, F, G • Class III • Zone 20 and 21 Group IIIC • Zone 22, Group IIIB • Simultaneous Exposure • Marine Outside Type (Salt Water) for USA ONLY • Wet Locations • Type 3R, 4, 4X, IP66/67 • cCSAus: 164460 Certificate Number: 700736 11 ATEX jIECEx CERTIFICATIONS AND COMPLIANCES • Certification Type: Areamaster Gen 2 —Gas: Zone 2 - Conforming to ATEX 2014/34/EU: 113 G - Type of Protection: Ex ec IIC Cc - Temperature Class: T5 to 13 — Dust: Zone 22 - Conforming to ATEX 2014/34/EU: 113 D - Type of Protection: Ex tc I IIC Dc - SurfaceTemperature: +85°C to +100°C (+185T to +212°F) • Ambient Temperature: -40°C up to +65°C (-40°F up to +2687) • EU Declaration of Conformity: 50317 • ATEX Certificate: SIRA 17ATEX3241 • IECEx Certificate: IECEx SIR 17.0079 • Index of Protection according EN/IEC 60529: IP66 • Impact Resistance (shock): IK10 • Photobiological Safety, IEC 62778 and IEC 62471: RG0 DESIGNLIGHTSTM CONSORTIUM • All models EMERSON,.. CONSIDER IT OLVEDTM. HAZARDOUS AREAMASTEIUM GENERATION 2 LED PRODUCT ORDERING GUIDE I AREAMASTER GENERATION 2 LED AMLG Series: AMLG: Areamaster 2 LED L7 Lumen Level O: L6 - 9K L7 -15K L8 -19K C Color Temp CCT: C - 5000K W - 3000K @ Co 3000K CCT (warm) is not available with NEMA 7x7 light pattern C: All lumen values are typical (tolerance +/-10%). C: Diffused polycarbonate available for NEC/CEC only. G Diffusion: C - Clear Class F - Frosted Glass O D - Diffused Polycarbonate 7 Beam Spread: 6 - 7x7 (non -optic) 7 - 7x6 ( Frosted Glass is only available with NEMA 7x7 light pattern BNvoltage available for NEC/CFC only. BU Voltage: BU -120-277 Vac 50/60 Hz, 170-300Vdc BH - 347-480Vac 50/60 HzG 0) Use of fuse voids Marine rating. Fusing not available for NEC/CFC. © 10 KV Surge Protection available for NEC/ CEC only. 5 Options: F- Fusing S -10 KV Surge Protection a M - M20 Metric AM LC L6 AM LC L7 AMLG LS Equivalent to HPS/PSMH 175-250 Watt 250-400 Watt 400-750 Watt Input Power 70 Watt 110 Watt 150 Watt Voltage Range BU 120-277 Vac, 50/60 Hz, 170-300 VDC BH O 347-480 Vac, 50/60 Hz Luminous Flux (Efficacy) O for 5000K Clear 7x7 9900 (141) 15300 (139) 19900 (133) 7x6 9000 (129) 14200 (129) 18400 (123) Correlated Color Temperature (CCT) 3000K/5000K Color Rendering Index (CRI) 80/70 Ambient Temperature -40 °C to +65 °C (-40 °F to +149 °F) T Rating NEC/CECCIass I Division 2 T4A @ +65 °C (+149 °F) T3C @ +65 °C (+149 °F) T3A @ +65°C (+149°F) T Rating ATEX/IECEx Zone 2 T4 @ +65 °C (+149 °F) T3 @ +65 °C (+149'F) T3 @ +65 °C (+149"F) Luminaire Weight 9.8 kg (221b) Standard Materials Housing: copperfree aluminum Finish: architectural bronze polyester Lens: thermal shock- and impact -resistant glass or optional frosted glass Lifetime >100,000 hours @ +40°C (+104°F) ambient temperature >60,000 hours @ +65°C (+149°F) ambient temperature Warranty 5 years standard; 10 years for models with secondary optic and extra surge protection CO All values typical +/-70% . O 8N voltage available for NEC/CEC only Luminaire Category Image Effective Projected Area (EPA) — FPA* DC m2 (ft2) 90° to Ground -Worst Case Mounting 0.39 (1.28) i r. 45° to Ground -Standard Mounting %op 0.55 (1.82) 4' 1 ` rirl ("6.isir) cok:rit.Ir WM?'' 44.5 run r'.7.`.ir) 5s9riri (5ir) ?25.7 rwi r'2.N.iv.) '55.5 rrt (b. 6ir} 4 LAW Yocr n)met:ranrc r oirs n ';S ru•,i (i).55 iv) 125.1r it!' (!.a` in) Jr, 1r''.: nisi (1.54 iv) {f, run } (5.COir) 52.4rill t&.CQ irjiltRkINC RADIt:;1 !SO' ROTATION Photometric Data 7x7 7x6 - - /f j I\ 1 \ ,H r '' .� ,r• '`ti "" `ti, 1 I It -I---. / ' I f I 4i � 4 % y '1/2.— *.r r / f / / i \ / i \ �` "1/2..--r/ r. .r '� f / '{'4% — 'f�—+ -1.. — — •�. r- 'r -"-• x . �- - .••r.1.- /�+. ---2fc 1 fc . fc —---0.2k — — fc 1 fc 0.5 fc —---0.2fc — — 0.1 ft — — ---2fc — — — — — — — — — — 0.5 0.1 a — — — - — — — Note: 7 IC= 70.8 Lux LET A� United States: 1.800.621.1506 I Asia/Pacific: + 65.6556.1100 I Australia: + 61.3.9721.0348 Canada: + 1.888.765.2226 I China: + 86.21.3338.7000 I Europe: + 33.3.22.54.13.90 Mexico/Latin America: + 52.55.5809.5049 I Middle East/Africa/India: + 971.4.811.81 00 www.a ppletonelec. com EMERSON.. Appleton C rp LLC d{hla Appleton Croup. The Appleton and Emerson logos are registered in the U.S. Patent and Trademark Office. All other product or service namesare the property of their registered owners. ©2018. Appleton Crp LLC. All rights reserved. rift IIIIIIN N ...„m ,„.., ri. INft4CU al N = O m -. TI = m ICJ N) CSC IR I - O C rrip L .D ' ' V .. rri _L 0 �V/ w7c *r V I_ / I • ' / - . • • 4 • , A- a 4. • 4a. 8 . a. -.I • .. . • x * C ONF IDENTIAL * * THE INFORMATION CONTAINED IN THIS DRAWING IS PROPRIETARY AND CONFIDENTIAL. UNAUTHORIZED DUPLICATION OR DISSEMINATION (IF THIS DOCUMENT IS STRICTLY PROHIBITED WITHOUT PRIOR WRITTEN NOTICE FROM ANERICAN LITE POLE. AMERIC'AN LITE POLE 2800 S. HULEN. SUITE 200 FORT WORTH. TX 76199 817-924-3682 PH. 817-924-7049 FAX b ' 4 ! b 4 '11r � t4.4 .,s8 ; N Z a•J ._—__. , �JJf, 1`�f T T VJ y V > . 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CD NJ I 0 C]1 0 C4 �b {Q 73 ZI RE STl 20' REVISION DESCRIPTION I�l CJ7 rt • r t .d r.1 tv �Q_ o COC4 o > L 7 0 H❑o a M GO I n I C.F1 CO 04 O CO Co N == Q C M > n �?- Jl II Il 4 4 4 CoC© co € rn ;� TOF 1 U' O --it-r. 2 O 0 o�-,co 0 y X X X C ;HG -20 -40 - DESIGN POLE 1 MERCIAL S C DATA Iv m .0r70o O rri 23 r} r r -e CJ � 'f -o'c rn = r r r �� O� r 70 Q x� 0 T �) I' I U! 7 }.� rANDARD I''�� DETAIL ez DETAIL 1 Ll ti7I ILO C IQ1Eiji I IU t c J��, 11j((phhJJ 1 r j Cril rn 0 I"T I m c m = Q 20 I O .,I C� s1 fp C 31 n Cry rn n l m I I in, rr G r (-5, ,_,=___, z 0, NJ 9oc.0 ):=_._‹, „ , --, CZ r rn a m, C. G? -I 00.Q I i -ph. o - rn ma o• rQ > C y� r Q _ O -I G7r " rn -cro_ -I • "n-� u->> _ '~4 Frl (J1 _I MISC. S d BSV8 POLE SI ANCHOR BASE P — — — — — DRAWING NUMBER: SNSIIG-20-40-7-AB QUOTE NUMBER: PO NUMBER: I33 C� O 0rn Cr H -Is r-, O 2 x al t r,0 Fri Q a D {J7 -4 c v r. Cdr, 13 TEEL BOL1 LATE 1N3P D o 0 - N LATE > H 70rn== C O -I )] Le) _ - L 4 m f —I m k CD tr r sr-)rrl 8 r O > co co co op y {ll T8'190 31210 -70 -r-i 0.- IORBeL up Co I '-'' ❑ ' Z I D 0 _ A3 54 A3 LSV 0 cu CHKD BY: C -I DWG BY: BM o 01 m = rte 0.-0 . TE # O cn _ S' roc rnmcn = rn CONCEPTUAL LANDSCAPE PLAN Suggestion to add additional landscape treatment to shield the view of the property owner looking to the southeast and traveling public on GR 27 looking east Scotch Pine Austrian Pine Rocky Mountain Juniper `Landscape plan subject to change based on final engineering. Final Engineering would include Austrian Pine (Pinus nigra) Mature height: 50' - 60' Mature width: 20' - 40' Scotch Pine (Pinus sylvestris) Mature height 30' - 5d Mature width: 20' - 30' Rocky Mountain Juniper (Juniperus scopulorur7 ) Mature height 20' - 30' Mature width: 10' - 15' C K ita;a ENERGY PARTNERS July 13, 2018 Dear Neighbor',, You are invited to an Open House hosted by Rimrook Energy Partners (UP) to learn about a proposed natural gas compressor facility. The facility is proposed to belocated approximately 'A mile south of Weld County Road 84 and approximately 113 mile east of Weld County Road 27 in unincorporated Weld County. Tuesday, July 24, 2018 — 7 ppm. Ault Fire Station 16680 State Highway 14 Ault, CO 80610 You have been invited as you are listed as a pr-opert ► o na within 1,000 feet of the proposed location in the Weld County Assessor Records. Rimrock Energy Partners (REP) is a midstream oil and gas company comprised of seasoned professionals committed to safety, environmental stewardship, community and personal achievement. Our firm has more than 100 years' combined experience working in northern Colorado and Weld County in particular.. At REP, we strive to be a trusted partner and are respected for our expertise, experience, and ability to collaborate. The facility is an unmanned facility with monitoring from the proposed Pierce, Colorado field office. This compressor station will expand the capacity and improve the efficiency of moving natural gas gathered from the area to the Pierce facility. The approximate 15 -acre facility ill compress natural gas so Chat it can be transported to the Pierce facility where it will be processed further. The compressor station wi]l l also have separation and filtering equipment that will remove water, condensate, and other impurities from the natural gas stream. Any collected water and condensate liquids will be trucked off site for sale or disposal. in accordance with, federal, state and focal regulations. This facility is currently under design but we would like to show you the preliminary site at the open House and receive your feedback. P will he working towards a permit submittal with Weld County. We would be more than happy to address any questions you or your family may have about this project. If you are unable to attend this meeting, please contact us at info@rimrockener.corm Your input is very important to us throughout the entire project, Sincerely, Keliptsu Kevin Bailey Chief Operating Officer MAP # PARCEL NAME ADDRESS CITY STATE ZIPCODE SEC -TOWN -RIVE* -C EC GIS ACRES WITHIN 1,000' 2 070705000019 THORNTON CITY OF 9500 CIVIC CENTER DR THORNTON CO 80229-4326 55 T7 R66 164.637039 x 4 070705000037 FREEMAN MICHAEL K 13377 COUNTY ROAD 84 AULT CO 80610-9705 S5 T7 R66 9.999759 x 5 070705000038 FREEMAN MICHAEL K 13377 COUNTY ROAD 84 AULT CO 80610-9705 S5 T7 R66 133.130509 x 12 070707000042 DRAKE DAVE 39525 COUNTY ROAD 23 AULT CO 80610-9735 S7 T7 R66 1.038693 x 14 070707000046 VARDIMAN CATHERINE EILEEN 38509 COUNTY ROAD 65 GALETON CO 80622-9611 S7 T7 R66 2.65737 x 18 070707100004 DRAKE DAVE 39525 COUNTY ROAD 23 AULT CO 80610-9735 S7 T7 R66 NE4 146.110256 x 19 070707100012 HILDERBRANT JOHN B III 18691 COUNTY ROAD 80 1/2 AULT CO 80610-9632 S7 T7 R66 NE4 2.541758 x 20 070707100013 HILDERBRANT JOHN B III 18691 COUNTY ROAD 80 1/2 AULT CO 80610-9632 S7 T7 R66 NE4 7.780063 x 22 070708000028 U S A (CO BLM Office) 2850 YOUNGFIELD ST LAKEWOOD CO 80215-7210 S8 T7 R66 5.503571 x 23 070708000031 THORNTON CITY OF 9500 CIVIC CENTER DR THORNTON CO 80229-4326 S8 T7 R66 34.368239 x 25 070708000037 SHAWVER EARL LEE JR 13500 COUNTY ROAD 84 AULT CO 80610-9706 S8 T7 R66 9.836282 x 27 070708000040 THORNTON CITY OF 9500 CIVIC CENTER DR THORNTON CO 80229-4326 S8 T7 R66 201.257897 x 28 070708100041 STEWART DENNIS C (BN) 13760 COUNTY ROAD 84 AULT CO 80610-9706 S8 T7 R66 NE4 3.857919 x 29 070708100042 FREEMAN MICHAEL K 13377 COUNTY ROAD 84 AULT CO 80610-9705 S8 T7 R66 NE4 62.186544 x 30 070708200017 NCL INVESTMENTS LLC 1110 W ENCLAVE CIR LOUISVILLE CO 80027-2904 58 T7 R66 NW4 113.950911 x 31 070708200020 NCL INVESTMENTS LLC 1110 W ENCLAVE CIR LOUISVILLE CO 80027-2904 58 T7 R66 NW4 11.057966 x 32 070708200021 NCL INVESTMENTS LLC 1110 W ENCLAVE CIR LOUISVILLE CO 80027-2904 58 T7 R66 NW4 7.759846 x 33 070708200022 NCL INVESTMENTS LLC 1110 W ENCLAVE CIR LOUISVILLE CO 80027-2904 58 T7 R66 NW4 7.753275 x 34 070708200023 CLUETT EDMUND III 40928 COUNTY ROAD 27 AULT CO 80610-9732 S8 T7 R66 NW4 13.520691 x 36 070708300002 THORNTON CITY OF 9500 CIVIC CENTER DR THORNTON CO 80229-4326 S8 T7 R66 SW4 115.59657 x Legend LOCAL ROADS HIGHWAYS Proposed Compressor Station Parcel Parcels Within 500 Feet Parcels Within 1000 Feet Parcels Within 1500 Feet Parcels Within Half Mile Other Parcels STS HWY44 TETRA TECH www.tetratech.com 1900 S. Sunset Street, Ste. 1-E Longmont, Colorado 80501 PHONE: (303) 772-5282 FAX: (303) 772-7039 NWC DEVELOPMENT, LLC WINDSOR COMPRESSOR STATION WELD COUNTY, COLORADO SEVERENCE COMPRESSOR STATION SITE SURRONDING PROPERTY OWNERS Project No.: 200-195516-18002 Date: JULY 03, 2018 Designed By: RJR Figure No. 0 0 w 0 0 2 ar w z 0 I- or w 0 CD z 0 z 0 0 It It 0 z 0 CO a_ 2 0 y 0 co tn O C 1.� LC) fA U7 0 - cc Welcome-Open_House Tuesday, July 241 2018 Name Address Phone Email Li C9-1,7 cot. Z3- ARI— w►�� V hi Pa"? 195/ w oz 96 Puificiwe. 9�d RIMROCKYRG FREQUENTLY ASKED QUESTIONS: Who is Rimrock Energy Partners? Rimrock Energy Partners (REP) is a midstream oil and gas company comprised of seasoned professionals committed to safety, environmental stewardship, community and personal achievement. Our firm has more than 100 years' combined experience working in northern Colorado and Weld County in particular. At REP, we strive to be a trusted partner and are respected for our expertise, experience, and ability to collaborate. We believe our emphasis on site safety, employee quality of life, and environmental health is unparalleled and critical to our success. We are guided on every project that we undertake by our company values: Integrity, Opportunity, Innovation and Commitment to Excellence. What oil and gas activity is currently happening in Weld County? According to the Weld County Planning Department, there are 23,753 active oil and gas wells in Weld County as of January 2, 2018. Weld County produces the largest quantity of oil and natural gas in Colorado. It produces more than 90% of the state's oil and nearly 40% of the state's natural gas production. In 2017, 63% of the drilling permits issued in Colorado were issued in Weld County. This equates to 2,466 new permits for drilling wells in Weld County in 2017. What is a Compressor Station? Compressor Stations compress natural gas into pipelines to a certain pressure to ensure the gas flows safely and efficiently to market or to a processing facility,. Compressor Stations are common for pipeline companies and can occur in low pressure and high-pressure services, however, the size and number of these facilities vary based on the diameter of the pipe and the volume of gas to be moved. Compressor Stations have traditionally been located on each individual oil/gas well pad. In an effort to reduce foot prints, consolidated compressor facilities are becoming an important part of the natural gas process. What is the process? When natural gas enters the compressor station, it flows through separation tanks. These tanks are used to disengage hydrocarbon liquids from the natural gas before the gas iscompressed by individual compressor units. After the gas is compressed to its higher pressure, it is treated to remove water from the gas stream. Water can contribute to pipeline integrity issues in downstream pipelines and needs to be reduced to acceptable levels. Liquids produced at the site are temporarily held at the Compressor Station and are removed for proper disposal. What kind of traffic should be expected? It is estimated that during operations, a typical Compressor Station will generate I — 3 trucks per week to remove the liquids separated out. Another :3 passenger vehicles each day will visit the site and employees will sporadically check on the Compressor Station throughout each month for various reasons. Will there be employees? The Compressor Station will be unmanned but will be checked at least twice a day during the week and for off -hour cailouts How will the Compressor Station be monitored? A Natural Gas Processing Facility is under review for development in the Town of Pierce. Monitoring and Instrumentation Controls at the Pierce facility will be able to identify any issues along the line and at the Compressor Station. In the event of an emergency, the incident can be isolated in the line. Employees will live in the area and the response rate to an incident will be less than an hour. The Compressor Station and Pipeline are continuously monitored for safety and there are emergency shut-off valves isolating the Compressor Station. Will there be odor generated at the Compressor Station? There will be no odors generated at the Compressor Station. What noise will be generated at the Compressor Station? Noises associated with the operation of the Compressor Station will include those associated with the engines, engine fans, and when the engines are starting. A noise study is underway so that REP can implement any necessary mitigation techniques. Who do I contact with additional questions? Rimrock would be happy to answer any additional questions you may have. An email has been established and is monitored each day. Please email Rimrock at: Info@rimrockenergy.com C COAN PAVION PAYNE. L �' August 23, 2018 Pierce Lateral Company Board of Directo do Sara Irby, Esq. **sent by email only to sarairhyf anc.cc m** RE: Rimrock Energy Partners Severance Compressor Station Dear Directors of the Pierce Lateral Company: au F, Garcia, Esq. 5586 W. 19th Street, Suite 2000 Greeley, C() 80634 970-339-3500 wgareia cp21aw_cnrn \ �v.\\..'cp2 a1vii-.cc.i11i This office represents Rimrock Energy Partners with regard to the above -cited development. On Thursday, August 9, 2018, representatives of Rimrock Energy Partners met onsite at .Rimrock's property north of Highway 14 and directly east of CR 27 in Weld County with Brian Foss and Randy Gustafson, representing the Pierce Lateral Company. Rimrock Energy Partners intends to submit an application for a Use by Special Review to locate a compressor station on this parcel. The Pierce Lateral Company has a ditch on the northern boundary of this property. The purpose of the meeting was to discussthe development plans and address any questions of the Pierce Lateral Company. As such, the following matters were discussed and these assurances are reiterated for the purpose of menorializat on: The proposed facility is anticipated to be on the easternmost portion of the property* south of the Pierce Lateral. it will be designed to detain a 100 year storm event and release per Weld County urban. drainage rules at historic rates. The drainage feature will release onto the Rimrock property at points 500 to 700 feet from the ditch. Drainage runs to the south and west on the parcel. away from the Pierce Lateral. The Pierce Lateral has large earthen berms on either side of the ditch. No ditch crossingsfor road access are needed or anticipated. Pipeline crossing will be addressed separately. Representatives of the Pierce Lateral Co. may have contact information for potential grazing lessees and will provide contact information to Rimrock. Please let us know if you have any further questions or concerns. Thank you for your professional courtesy in this matter. DENN ER FORT COLLINS I G1 EEU V Sincerely, Coan, Payton & Payne, LLC C COff►.N , PAYTON tl_ + PAYNE August 16, 2018 Water Supply & Storage Co. Dennis J. Harmon, General Manager P.O. box 2017 Fort Collins, CO 80522-2017 RE: Rimrock Energy Partners Severance Compressor Station Dear Mr. Harmon and Directors of Water Supply & Storage Company: William F. Garcia, Esq. 5586 W. 19th Street, Suite 2000 Greeley, CO 80634 970-339-3500 wgarcia@cp2law. c cam nw.cp2law.com This office represents Rimrock Energy Partners with regard to the above -cited development. On Tuesday, August 7, 2018, representatives of Rimrock Energy Partners met onsite at Rimrock s property north of Highway 14 and directly east of CR 27 in Weld County with Dennis Harmon and Jim McFall, representing Water Supply & Storage Company. Rimrock Energy Partners intends to submit an application for a Use by Special Review to locate a compressor station on this parcel. Water Supply & Storage Co. has a ditch on this parcel in the southwest portion of the property. The purpose of the meeting was to discuss the development plans and address any questions of Water Supply & Storage Company. As such, the following matters were discussed and these assurances are reiterated for the purpose of memorialization: • The proposed facility is anticipated to be on the easternmost portion of the property. • It will be designed to detain a 100 year storm event and release per Weld County urban drainage rules at historic rates. • The drainage feature will release onto the Rimrock property at points 500 to 700 feet from the ditch. • The facility will have three levels of containment. Employees are trained to observe runoff to verify that runoff is not carry hydrocarbons. • No ditch crossings are needed or anticipated. • Rimrock will prepare a hydrology plan relating to the drainage and provide a copy to Water Supply & Storage Co. Rimrock will reimburse Water Supply & Storage Co. for reasonable engineering expenses for reviewing the plan. This amount shall not exceed $300.00. • Water Supply & Storage Co. will provide any comments to the hydrology plan within two weeks of receipt of the plan. • Water Supply & Storage Co. provides the water that is used in the pivot on the subject parcel. Rimrock will inform them if the headgate needs to be removed when the sprinkler pivot is removed. DENVER I FORT COLLINS I GREELEY Page 2 • Rirro k will notify Water Supply & Storage Co. if electrical utility access is to be run on the property near the ditch Right of Way. Please let us know if you have any further questions or concerns. Thank you for your professional courtesy in this matter. Sincerely, Coan, Payton & Payne, LLC William F. Garcia Hello