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Home My WebLink About20193045.tiffc. U L c. MAJOR FACILITIES OF A PUBLIC UTILITY SECTION 1041 APPLICATION DEPARTMENT OF PLANNING SERVICES * 1555 N. al 7TH AVENUE * GREELEY! Co 80631 www.wel'dQov.cor-n * 970-400-6100 * FAX 970-304-6498 FOR PLANNING DEPARTMENT USE: AMOUNT $ APPLICATION RECEIVED BY DATE RECEIVED: CASE ## ASSIGNED: PLANNER ASSIGNED: Parcel Number*: See Application Package _ — Address of site: See Application Package Legal Description: See Application Package Zone District: A Acreage: 12 FEE O NER(S) OF THE PROPERTY: Name: See Aoolication Package Company: a MEI Floodplain: No (*A 12 digit number on Tax 1. D. information, obtainable at www.weldgov, m). _ Section: Township: N Range: Geological Hazard: No Airport Overlay: No Phone #: Email: Street Address: City/State/Zip Code: Name: Company: Phone #: Street Address: City/State/Zip Code: Email: Name: Company: Phone #: Email: Street Address: City/State/Zip Code: APPLICANT OR AUTHORIZED AGENT: (See below: Authorization must accompany all applications signed by Authorized Agents) Name: Mr. Larry Claxton Siting arid_Land i is hts, Principal Arent Company: Public Service Company of Colorado Phone It 303.571.7089 Street Address: 1800 Latimer Street, Suite 400 Email: larrv.claxtort xcelenergy.com City/State/Zip Code: Denver, Colorado 80202 PROPOSED USE: Northern Colorado Area Plant 230kV Transmission I Substation Site Project I (We) hereby depose and state under penalties of perjury that all statements, proposals, and/or plans submitted with or contained within the application are true and correct to the best of my (our)knowledge. Signatures of all fee owners of property must sign this application, if an Authorized Agent signs, a letter of authorization 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. Signature: er or Authorized Agent tile* IS' Date Signature: Owner or Authorized Agent Date La re c -f K. CCosaritigirr, Print Name Print Name Rev 4 SUPPLEMENTAL INFORMATION REQUESTED USE BY SPECIAL REVIEW (USR) PROCEDURAL GUIDE CHECKLIST DEPARTMENT OF PLANNING SERVICES * 1555 N. 17TH AVENUE * GREELEY, CO 80631 www.weldgov.com 970-400-6100 * FAX 970-304-6498 APPLICATION REQUIREMENTS The applicant shall submit 1 -hard copy and 1 -electronic copy containing one of all of the items listed. The application will be reviewed for completeness during the Completeness Review. X Submit a copy of the Pre -application meeting minutes X Submit application form X Submit Applicant's representative/authorization form if applicant or authorized agent is different than owner. Submit incorporation documents if the owner is an LLC, INC, etc. X Submit responses to USR questionnaire. NA Submit USR map with paper dimensions of 24" X 36". Not applicable for Section 1041 Permit Application NA Submit Certificate of Conveyances form and all attachments. Contact a title company to obtain a Certificate of Conveyances. The Certificate of Conveyances expires in thirty days of the signing date on the cover sheet. Refer to Section 21-3-330.B.2 - Title Information See Appendix H for Title Information X Submit a list of all the surrounding property owners (surface estate) within 500 feet of the property under consideration. This list must be a certified list of the names, addresses, and the corresponding parcel number assigned by the Weld County Assessor of the owners of property. Also submit the affidavit stating that the list is accurate. This list shall be compiled from the records of the Weld County Assessor, the Weld County Website, www.co.weld.us, or a person qualified to do the task. This list expires in thirty days of the date compiled. See Appendix H for affidavit and a list of all surrounding property owners. NA Submit copy of document showing evidence of adequate water supply (e.g., well permit or letter from water district). If using a well, please complete the attached Water Supply Information Summary. Request waiver as the project does not require water supply. See USR Questionnaire. NA Submit copy of document showing evidence of adequate sewage disposal (e.g., septic permit or letter from the sanitary sewer district). If having more than 2 full-time employees on site. If not, the environmental health standard is a portable toilet and bottled water. A waiver may be requested. Request waiver as the project does not require sewage disposal. See USR Questionnaire. N/A Notice of Inquiry or letter/email from a municipality if the site is located within an X Intergovernmental Agreement (IGA) boundary or a Cooperative Planning Area (CPA). No Notice of Inquiry or interest in annexation was received. Detention design summarized in a Drainage Report if required per pre -application meeting minutes. See Appendix C for Preliminary Drainage Assessment NA Traffic Study, if required per pre -application meeting minutes. Request waiver, not required per pre -application meeting minutes. X A community meeting is encouraged for owners within 500 feet of property boundary Three community meetings were conducted; see Appendix B: Siting Study, page 2-16 X Submit all required documents on electronically or via email in .pdf format. X Application fee NA Investigation fee, due only if this is a violation. DEPARTMENT OF PLANNING AND BUILDING DEPARTMENT OF PUBLIC HEALTH AND ENVIRONNMENT 1555 NORTH 17TH AVENUE GREELEY, Co 80631 AUTHORIZATION FORM FOR BUILDING, PLANNING AND HEALTH DEPARTMENT PERMITS AND SERVICES I, (We), Public Service Company of Colorado , give permission to Logan Simpson Design (Owner — please print) (Applicant/Agent — please print) to apply for any Planning, Building or Health Department permits or services on our behalf, for the property located at: Northern Colorado Area Plan: Section 1041 Areas and Activities of State Interest Application _ Legal Description: N/A Subdivision Name: Property Owners Information: Phone: 303.571.7089 of Section , Township Ni, Range W Applicant/Agent Contact Information: Lot Block E-mail: larry.claxton xcelenerciv,com Phone: 00 E -Mail: jcall@logansirnpson.com Email correspondence to be sent to: Owner Applicant/Agent Both Postal service correspondence to be sent to: (choose only one) Owner X Applicant/Agent Additional Info: Owner Signature. epatrriC Date: g es/ 3 -� (8" Owner Signature: Date: /0, Xcel Energy RESPONSIBLE BY NATURE. VIA E-MAIL cgathman@weldgay.com Chris Gathman Weld County Planning Department 1555 N. 17th Avenue Greeley, CO 80631 1800 Larimer St Denver, CO 80202 February 12, 2018 Re: Xcel Energy Northern Colorado Area Plan - Pre -application Meeting of January 19, 2018 - Meeting Notes D e ar Mr. . Gathman: Thank you for providing acopy of the county's notes prepared by Michelle Wall from the pre -application meeting held on January 19, 2018 regarding the above captioned permit application by Xcel Energy. I have enclosed for your use a copy of notes prepared by Xcel representatives who attended that meeting. The two sets of meeting notes which summarize the various matters discussed at that time are very similar in nature; however, there are a few matters which Xcel wishes to further address as follows: 1. You will recall from the meeting, Xcel representatives requested that the county staff explain why the proposed development requires a permit pursuant to the county's Section 1041 Regulations. Specifically, Xcel is of the belief that the proposed development may not trigger the county's Section 1041 Regulations pursuant to Section 21-1-50 of the County Code which sets forth various statutory exemptions. In particular, it is Xcel's belief that the specific development proposed will be on land which as of May 17, 1974 was zoned by the county for the use contemplated by such development. The information provided in your meeting notes summary addresses Section 1041 Regulations definitions for substations and transmission lines, but does not address the exemption provision set forth is Section 21-1-50 of the County Code. Based on the information which Xcel provided for the pre -application meeting, I am now requesting that you make a more specific determination regarding applicability of Section 1041 Regulations to Xcel 's proposed development pursuant to Section 21-2-30 of the County Code. 2. Assuming that the development activity proposed by Xcel is in fact subject to the Section 1041 Regulations, please confirm Xcel's understanding from the pre -application meeting that only one permit will be required for the development pursuant to the county's Section 1041 Regulations under a single application which will be reviewed by the Board of County Commissioners in one consolidated hearing. (Section 21-2-200 C.) 3. Also assuming that a 1041 Permit is required for proposed development, based on the discussion at the pre -application meeting it is Xcel's understanding that a separate Use by Special Review application and permit will not be required by the county. (Reference Section. 23-2-300) 4. Statutory requirements regarding location, construction and improvements to major utility facilities and the local government consultation process set forth in C.R.S. 29-20- 108 were also discussed in the pre -application meeting. Included in that discussion was an acknowledgment that the county regulations are statutorily mandated to require final action within 90 days after submission of a final application by Xcel. It was further discussed that the county review process would make it difficult to render a final decision within that 90 day time frame. Thus, Xcel indicated a willingness to enter into a waiver agreement in this regard with the county which is permitted pursuant to statute in order to extend the 90 day period for final action by the county. In this regard, it is Xcel's intent to initiate contact with Bruce Barker, Weld County Attorney, in order to complete the necessary waiver agreement which must be in place prior to Xcel submitting its application to the county. Thank you for convening the pre -application meeting with me and other Xcel representatives. I look forward to your response to this letter and working cooperatively with Weld County on this important project. Sincerely, \-)r Susan Innis Xcel Energy Manager, Siting and Land Rights Enclosure cc: Michelle Wall (via e-mail — mwall;f :weldgov.co ) w/enclosure Bruce Barker (via e-mail — bbarker@co.weld.us) w/enclosure Xcel Energy/Public Service Company of Colorado Northern Colorado Area Plan Local Government Consultation/Pre-application Meeting Weld County PRE17-0008 --1151 v/230kv Powerlines/Substations 1041 permit January 18, 2018 Meeting Attendees: Weld County►: Xcel: Chris Gathrnan (Planner III) Susan Innis (Manager, Siting & Land Rights) Hayley Balzano (Road and Bridge) Amber Dedus (Sr. Agent, Siting & Land Rights) Evan Pinkham (Road and Bridge) Jonathan Urrutia (Project Manager) Michelle Wall (Meeting Minutes) Jeremy Call (Logan Simpson) Julie Capp (Logan Simpson) Definitions: "Xcel" = statements, questions, or comments made on behalf of Xcel Energy and/or their contractor Logan Simpson "County" = statement, questions, or comments made on behalf of Weld County "lit " = statement, questions, or comments made on behalf of Weld County Road & Bridge Department Meeting Notes: 1. Introductions: 2. Project Overview: a. Xcel provided overview of state statute and introduced agenda for the meeting to meet purposes of both Weld County 1041 pre -application requirements and the state statute on utility facility siting. b. Xcel provided a project description and background for the Project. Xcel proposes to build a transmission line and two substations. Xcel has been planning this Project for years due to reliability issues in the Greeley and northern Colorado area. The Project has a planned in-service date of September 2020. Once the new facilities are built, the old facilities (Ault and Eaton substations) will be decommissioned — likely in 2021. It is not yet decided whether the 444161 transmission lines will be decommissioned. It is possible that they will become part of the distribution network. c. Xcel stated that the planned transmission line ROWs would be 150 -foot -wide total; 75 feet wide on each side of the centerline. d. Logan Simpson provided an explanation of the project purpose and need. Electrical service to the area is experiencing reliability issues, including several brief outages per day. e. XceXcel provided an explanation of the project schedule. The 1041 permit application will be submitted by March or April, 2018. Construction will begin September, 2019. The Project will be in-service in September, 2020. Decommissioning of the Xcel Ault and Eaton substations will commence in 2021 after the new system is functional. 3. Substation Properties: a. County asked Xcel about plans for two substation properties. b. Xcel indicated that they are evaluating multiple properties for both and will execute a purchase option for the two selected sites. 1 Xcel said they intend to purchase approximately 30 acres for each site, but the final purchased acreage could change as a function of the negotiations. County indicated that creating a parcel less than 35 acres will require a Recorded Exemption and that the minimum lot size in the agricultural zone is 80 acres. County suggested that xce I commence the subdivision process concurrently with filing the 1041 permit application and the County would like to receive the recorded plat before the Board of County Commissioners hearing. Parcel sizes ranging from 40-50 acres are considered non -buildable parcels. Parcels over 35 acres could go through full Subdivision Plat process. el Xcel explained that they will not close on the properties until they have the approved 1041 permit and have surpassed any appeal period. f. County said they would have to take this into consideration and inform Xcel of their requirements. County said they would look at how this was handled on other 1041 permits that included new substations. 4. County Road and Bridge Discussion: a. R&B discussed the Weld County floodplain areas and advised Xcel to review the county mapping system. b. Xcel will verify that they have the most current floodplain data utilizing the online county mapping system. c. R&B indicated that if any project facilities would be sited in a floodplain, a Floodplain Hazard Development Permit would be required. This permit is required for any construction in floodplains, including grading or fencing. R&B indicated that any required Floodplain Hazard Development permits will be a condition of approval for the 1041 permit. R&B indicated that any grading totaling over anacre will require a Grading Permit to be submitted, along with proof of a state Storm Water Management Plan (SWMP). When Xcel submits the Grading Permit for review, the unique COR number for the SWMP will be required rather than the entire SWMP. f. The Grading Permit should include drawings for proposed and existing contours, Best Management Practices (BLIP) for placement, and proposed reclamation seed mixes. g. Xcel asked if the County has any minimum contour interval requirement for drawings. County responded that they do not have any contour interval requirement. h. R&B asked if any portion of the Project is within the MS4 area and if so, inspections will be required. i. Xcel responded that they didn't think any portion of the Project was in the MS4 area. The MS4 area would be noted on a map and confirmed through the referral process. R&B stated that the transmission line is exempt from drainage -related reports. County indicated the transmission line meets an exemption in code, this should be mentioned in application narrative. However, the substations will require a Drainage Report and Detention Pond Design to be submitted to the County for review. The County is asking for a preliminary drainage design for each substation to be included in the 1041 permit submittal in March or April. k. R&B mentioned that Xcel will need an Access Permit for any new or existing access to the substations or for permanent access for the transmission line. Suggested that Xcel Energy apply for temporary access permits rather than permanent access permits. Horseshoe access for substation sites will be evaluated for safety. Xcel responded that permanent Access Permits may be required for ongoing project operations. 2 L The County stated that they would make sure that any Xcel proposed Access Permits maintain the required distance between access points. m. County stated that temporary Access Permits are issued for 6 month intervals and typically don't have minimum spacing requirements. Morgan Gabbert is the County representative who can be the point of contact on all access issues and permits. n. R&B indicated that when Xcel is working within the county ROW, a ROW Permit will be required. One Right -of -Way (ROW) permit would be required for construction and another for decommissioning. The County suggests submitting a l l of the ROW Permits together. The County indicated that this will also be a condition of 1041 permit approval or a development standard. Amy Joseph is the County representative who manages ROW permits. o. Transmission lines must be sited outside future ROWs. A typical ROW for a county road is 60 feet wide. p. R&B discussed the need to account for future county road widening projects. The County identified CR 74 as being slated for a 140 -foot ROW, and CR 29 will be widened to a 100 -foot -wide ROW. County agreed to provide Xcel with information on future ROW widening projects. q. County advised that Xcel review any existing Access Control Plans for CRs in the project vicinity. Xcel noted areas of concern on a hard copy map for CR 29 and CR 74. r. County indicated that an Improvements Agreement will be required on gravel county roads and will be in place during construction. This agreement will become a condition of approval. Tracking control will also be required. s. R&B indicated that CR 74 and CR 29 ('between CR 100 and CR 391) are very busy roads for the County with planned development projects and asked Xcel to take this into consideration. Xcel marked up hard copy map with specific areas of concern. t. Logan Simpson questioned whether any additional permits would be required for the Project. County stated that the Project would be exempt from building permits. Logan Simpson requested confirmation that the 1041 permit is an umbrella permit for other permits. County confirmed that Xcel Energy will submit one 1041 permit application for the entire project rather than separate permit applications for the three project segments. 5. General 1041 Discussion: a. Xcel asked whether they were only required to submit a single 1041 permit application and asked the County to confirm whether or not a Use by Special Review (USR) permit will also be required. The County nodded in agreement that only the 1041 permit is required and no USR permit is required (County pointed to the USR application and questionnaire on a laptop computer.) b. County suggested that Xcel may want to waive requirements for any full-time employees on site, such as bottled water and toilets. 6. FAN/Telecom m Tower Discussion: a. County questioned whether Xcel Energy planned to construct any communication towers. Xcel responded that it has not yet been determined. b. County requested that if a FAN tower is needed in either of the substations that they be included in the 1041 application submittal. County noted requirements in Chapter 23, Division 4 requiring visual impacts and alternatives analysis. '. Previous 1041 Permit Applications for Guidance: a. Xcel indicated that they reviewed Tri-State Generation and Transmission's SWEP 1041 permit application and the Avery Project 1041 Permit application. 3 b. County indicated that a recent 1041 fora wind farm with a small generation tie was a well done 1041 permit application submittal and advised Xcel to review it for guidance. (USR130054) 8. Intergovernmental Boundary Agreements (IGA): a. County has an IGA with Ault, Severance and Windsor with 3 -mile radius referral areas. Ault and Windsor would be impacted by Xcers project. After County sends notice, the municipalities have a 21 day window to discuss annexation. Xcel can reach out to them directly. The municipalities have the option to annex substations into their jurisdictions but the County is unsure how that would apply to a transmission line. 9. Town of Ault Permitting: a. Xcel asked if County had a preference for commencing permitting activities with the Town of Ault for one of the substations (Husky Substation). b. The County has no input on this matter. 10. western Area Power Authority: a. WAPA has a review process. Xcel is coordinating with WAPA to satisfy the N EPA process. 11. Mandatory 90 Day Review Period: a. Xcel reported that the state statute dictates that when the 1041 permit application is deemed complete, a mandatory 90 day review process will begin. From that time there is a 90 day requirement to get the Board of County Commissioners decision. In other jurisdictions Xcel agreed on an alternate review timeframe, approximately 120 days. b. The County stated that the 90 day timeframe would be very difficult for them to achieve. c. County does a completeness review within 1 to 2 weeks of submittal, then Xcel pays the fee and the County sends the application out for referral. Referral agencies have a 30 days to review and respond. The Planning Commission hearing is 75 to 90 days from the submittal date. Hearings are held on the first and third Tuesdays of each month and it is usually fairly easy for the County to schedule a hearing. County indicated that the Board of County Commissioners is scheduling approximately 2 to 5 weeks after the Planning Commission hearing. The Planning Commission meets every Wednesday for land use hearings. The County schedules this Planning Commission meeting with the Board of County Commissioners office. The Board of County Commissioners is currently scheduling hearings in April for pending cases. d. Xcel stated a target of September 2018 for the 1041 permit approval. e. County stated that this would be a conditional approval. f. Xcel stated that their attorney would want to meet with the Weld County Attorney before the 1041 application is submitted in order to develop an agreement for an alternate review time period. g. Chris Gathman will be out of the office from April 14 - 30. Xcel should avoid submitting the permit during this time. Xcel could submit the 1041 permit for approval by the end of March so that the application could be out for referral during the 2 weeks that Chris is gone. 12. EMF and Noise a. Xcel asked if they can submit the EIIF and noise information from the CPCN. County agrees to submit this information. 13. Level of Detail on Transmission Corridor: a. County directed Xcel to present the corridors in the permit. Xcel can submit as-builts following construction as required. Structure locations can be provided for the Floodplain Permit as required before start of construction. Xcel questioned the County 4 for an opinion about the proper corridor width to depict. County referenced the notification requirements, but otherwise does not specify corridor width definitively. Xcel questioned the appropriate mapping scale for the permit. Xcel plans to submit maps, one for each transmission line segment. The County recommends also having one large overview map and 3 segment maps, as suggested by Xcel. c. Xcel questioned whether a plot plan is required for the substation(s). The County indicated it is required. Xcel clarified that detailed electrical substation design information will not be on the plan, but fences, detention ponds, and access points will be depicted. d. Xcel questioned fence requirements for the substations. County discussed the visual aspect of fencing and may require a more solid fence. Xcel stated that a 1 foot barb topper may be placed on the chain link fence. Xcel fencing must comply with federal safety regulations. e. County questioned whether Xcel is proposing any landscaping around the substations. Xcel indicated they are not planning any landscaping at this time. Explanations of safety and reliability concerns with landscaping and fencing will be included the 1041 permit application. f. Plot plans are required for substation site(s), final ROW plats can be a condition of approval, recorded prior to start of construction. 14. Visual Simulations: a. Xcel questioned whether visual simulations should be included in the 1041 permit application. County indicated this would be advisable. 15. Public Open House: a. Xcel invited County to the Public Meeting on January 24, 2018 and provided logistical details. b.County confirmed that a press release is not required until prior to the Board of County Commissioners meeting and County will issue the release. 16. Notice Signs: a. Xcel asked what requirement the County has for notice signs during construction. County indicated that given the large nature of the Project, this is not required for the transmission line. Signage will be required at substation construction sites. 17. Mineral Notification: a. The County indicated that mineral owners under the transmission line do not need to be notified; however, notification must be sent to mineral owners for the substation properties. b. County stated that they have a Mineral Notice Affidavit, which will be required for the substation properties. c. Xcel inquired about a requirement to include mortgages, liens, etc. with the title information in the 1041 permit application. Xcel indicated this wasn't necessary or appropriate and the County agreed. A landowner list will be provided with 1041 permit application submittal. 18. Decommissioning Agreement: a. Xcel indicated that facilities are rarely decommissioned. County stated they have seen a Decommissioning Agreement for wind projects but not for transmission lines. County will investigate and confirm whether a Decommissioning Agreement will be required. Xcel will provide details of PUC oversight of decommissioning in the 1041 permit application. 19. Miscellaneous: 5 a. County indicated the substation(s) will have setback requirements from property lines (1:3 height offset or 20 feet from edge of future road ROW). County also discussed clearance regulations for 75 feet on either side of the centerline for the transmission line. b. County indicated that there is a setback for telecom facilities (1:1). c. County stated that there will not be a fence permit required for substation fences. d. County questioned whether the Project would be near residences. Xcel responded that the Project would be near residences but would not span any. e. Xcel requested the County provide a short description of their determination that the code requires a 1041 permit for the Project and not a Use by Special Review permit. f. An Emergency Management Plan will likely become a condition of approval, and County suggests including this in the 1041 permit application as an appendix. g. Weld County minutes — County indicated that the meeting minutes that they prepared are for the County's record. The County plans to circulate these minutes on or before February 5, 2018. h. County follow up on: i. Whether the Recorded Exemption can be waived for substation properties. ii. Future ROW widening projects beyond CR 29 and 74. iii. Newspaper advertising costs (notice cards may be sent by County when the 1041 permit application is received; jpg of project overview map may be requested from Xcel); (County's pre -application minutes note that the applicant shall place advertisement in the newspaper prior to the BCC hearing.) iv. Agency referral fees in addition to the $10,000 application fee for 1041 permit. v. Whether a Decommissioning Agreement is required for transmission facilities. vi. Clarification that the project does not require a Use by Special Review permit. MEMORANDUM TO: PRE18-0007; Case File, pre -application DATE: January 19, 2018 FROM: Michelle Wall, Office Technician SUBJECT: Pre -Application Meeting prior to submitting 1041 USR Permit Attendees: Susan Innis, Xcel Energy, Applicant Amber Dedus, Xcel Energy Jonathan Urrutia, Xcel Energy Julie Capp, Logan Simpson Jeremy Call, Logan Simpson Evan Pinkham, Public Works Hayley Balzano, Public Works Chris Gathman, Planning Michelle Wall, Planning On Friday, January 19, 2018 an informal discussion took place at the Greeley Administrative Offices Conference Room regarding two new proposed substations and the expansion of two existing substations. (The legal description is PT N2 Section 6, T7N, R66W of the 6th P.M.) Background Information: PSCo is proposing to build the new Northern Colorado Area Plan, including approximately 25 miles of new 115 -kilovolt (kV) and 230 -kV electric transmission between the Western Area Power Authority (WAPA) Ault Substation and a location northeast of Greeley where the new 115 -kV transmission line connects to Xcel Energy's existing 115 -kV line near the Cloverly Substation. The project also includes construction of two new substations and the expansion of two existing substation facilities. The Northern Colorado Area Plan would increase generation capacity, enhance electric reliability and expand load -serving capability of the Xcel Energy electric transmission system north of Greeley. The proposed project is the first step in replacing the existing aging 44 -kV electric infrastructure throughout the region with higher voltage facilities. The 44 -kV system is one of the oldest transmission assets owned by Xcel Energy, with infrastructure dating back to the early 1900's. If the project were not constructed, PSCo will continue to have performance and reliability issues with the existing 44 kV transmission system, resulting in higher operations and maintenance costs, lost revenue during outages and strained relationships with local customers and elected officials and other potential load customers. The 1041 Permit Application would address the following components: 'Ault - Husky 230 kV transmission line: The line will be built from the existing Western Area Power Administration (WAPA) Ault Substation to a new Xcel Energy Husky Substation. Husky is expected to be located west of the existing Xcel Energy 44 kV Ault Substation (different than the substation of the same name operated by WAPA). The transmission line will be approximately four miles long and built double -circuit 230 kV capable. Only one circuit will initially be installed and operated at 230 kV. 'Husky Substation: This new substation will replace the Xcel Energy Ault 44 kV Substation, which will be decommissioned. The Husky Substation will also accommodate distribution upgrades that increase reliability. 'Husky - Graham Creek 115 kV line: The new line will be approximately seven miles and be built double -circuit 230 kV capable. Only one circuit will initially be installed and operated at 115 kV. +Graham Creek Substation: This new substation will replace the Xcel Energy Eaton 44 kV Substation, which will be decommissioned. The Graham Creek Substation will be constructed to accommodate distribution upgrades and improve system reliability. +Graham Creek - Cloverly 115 kV line: This new line will be approximately eleven miles and be built double -circuit 230 kV -capable. Only one circuit will initially be installed and operated at 115 kV. Eight miles of that new transmission will be built double -circuit 230 kV capable. The remaining three miles are already constructed to be 115 kV capable. The two new substations will be located within the yellow alternative transmission route corridors, with final locations anticipated near Ault and Eaton. The alternative route corridors shown on the map are 1200 feet wide, but the proposed transmission line, if built, will only require a 150 -foot right-of-way. The transmission line and substation will operate and be monitored remotely 24 hours a day, 7 days a week to ensure safe and reliable electric service. The facilities will be unmanned and only during routine or emergency maintenance events will personnel be on site. Building Department Staff was unavailable; however please contact Jose Gonzalez at 970-353-6100 ext. 3540 for further direction. Building permits may be required, per Section 29-3-10 of the Weld County Code. Currently the following has been adopted by Weld County: 2012 International Codes; 2006 International Energy Code; 2014 National Electrical Code; A building permit application must be completed and two complete sets of engineered plans bearing the wet stamp of a Colorado registered architect or engineer must be submitted for review. A geotechnical engineering report or an open -hole inspection report performed by a registered State of Colorado engineer may be required for new structures and or additions. Pre -Manufactured non-residential structures may be required to comply with state Resolution 35. A complete code analysis prepared by a registered design professional may be required, and shall be submitted with Commercial Permit Applications to Weld County. A Fire District Notification letter may be required and shall be submitted with Commercial Permit applications. Building Staff recommends a pre -submittal meeting with Building Department to verify all requirements are present. Current Plan Review time is 20-25 working days. Incomplete applications may delay plan review timelines. All building permit requirements can be found on the Weld County web -site: www.weldgov.com/departments/building/building permit/permit applications/. Health Department Staff was unavailable; however please contact Lauren Light at 970-400-2211 for further direction. Waste handling: Waste materials shall be handled, stored, and disposed in a manner that controls blowing debris, and other potential nuisance conditions. The applicant shall operate in accordance with Chapter 14, Article 1 of the Weld County Code. Please answer the following if applicable; indicate if there will be washing of vehicles or equipment, fuel storage, maintenance of vehicles or equipment, floor drains in shop, air emissions permit. Onsite dust: Fugitive dust should attempt to be confined on the property. Uses on the property should comply with the Colorado Air Quality Commission's air quality regulations. Sewage disposal information: Include in application how sewage disposal will be accommodated. If using a septic system provide a copy of the septic permit. Either utilize the County website www.co.weld.co.us/maps/propertyportal/ or call (970-304-6415) or stop by EH front counter and request a copy. Potable water information: Include in application how potable water will be provided. Provide a will serve letter or water bill from the water district or provide a copy of well permit. Portable toilets and Bottled water can be used for employees and customers per policy below: TO DEFINE WHEN PORTABLE TOILETS AND COMMERCIALLY BOTTLED WATER ARE ALLOWED Purpose: To define when portable toilets and commercially bottled water are allowed. Policy: Bottled water from a commercial source is allowed in the following circumstances: 1. Temporary or seasonal uses that are utilized 6 months or less per year (for example recreational facilities, firework stands, farmers markets ) 2. Gravel mines 3. 10 or less customers or visitors per day And/or one of the following: 4. 2 or less full time (40 hour week) employees located on site 5. 4 or less part time (20 hour week) employees located on site 6. Employees or contractors that are on site for less than 2 consecutive hours a day Policy: portable toilets are allowed in the following circumstances: 1. Temporary or seasonal uses that are utilized 6 months or less per year (for example recreational facilities, firework stands, farmers markets ) 2. Gravel mines 3. 10 or less customers or visitors per day And/or one of the following: 4. 2 or less full time (40 hour week) employees located on site 5. 4 or less part time (20 hour week) employees located on site 6. Employees or contractors that are on site for less than 2 consecutive hours a day Public Works Staff comments for pre -applications are provided as a courtesy to the applicant. While we strive to help identify as many potential issues upfront during the pre -application meeting we cannot anticipate every issue that may come up during the formal application process. Parcel(s): Multiple The project proposes: Transmission Line and Two Substations ROADS AND RIGHTS -OF -WAY: County Road 27 is a section line right of way. Section line right-of-way does not exist in all sections in Weld County and should be verified before a decision to utilize it is made. Weld County commonly refers to these as "Non -Maintained Section Line Right -of -Way." The existence of a physical road does not imply public right-of- way and the road may be located on private property. All right-of-way should be verified and physical roads located in relationship to the public right-of-way to ensure trespassing does not occur. The applicant shall verify the existing right-of-way and the documents creating the right-of-way and this information shall be noted on the site plan or plat. The applicant shall delineate on the site map or plat the existing right-of-way and physical location of roads to be used. If the right-of-way cannot be verified it shall be dedicated or an adequate easement between property owners shall be provided. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadway many not be centered in the right-of-way. This road is NOT maintained by Weld County. County Road 86 is a gravel road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) local road, which requires 60 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 29 in this location is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as an arterial road, which in this location requires 100 feet of right-of-way. If the right-of- way cannot be verified it shall be dedicated. The applicant shall also delineate the physical location of the road. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. This road is maintained by Weld County. County Road 31 is a gravel road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) local road, which requires 60 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 33 is a paved road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) collector road, which requires 80 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of- way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 84 is a gravel road west of County road 33 and a paved road east of County Road 33. It is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) local road, which requires 60 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3- 50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 80 is a section line right of way. Section line right-of-way does not exist in all sections in Weld County and should be verified before a decision to utilize it is made. Weld County commonly refers to these as "Non -Maintained Section Line Right -of -Way." The existence of a physical road does not imply public right-of- way and the road may be located on private property. All right-of-way should be verified and physical roads located in relationship to the public right-of-way to ensure trespassing does not occur. The applicant shall verify the existing right-of-way and the documents creating the right-of-way and this information shall be noted on the site plan or plat. The applicant shall delineate on the site map or plat the existing right-of-way and physical location of roads to be used. If the right-of-way cannot be verified it shall be dedicated or an adequate easement between property owners shall be provided. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadway many not be centered in the right-of-way. This road is NOT maintained by Weld County. County Road 78 has no right of way between County Road 31 and halfway between County Road 33 and County Road 35. County Road 76 is a gravel road west of County Road 33 and is a paved road east of County Road 33. It is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) local road, which requires 60 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3- 50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 74 is a paved road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) arterial road, which requires 140 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of- way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3.60, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 72 is a gravel road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) local road, which requires 60 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 35 is a paved road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) collector road, which requires 80 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of- way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 37 is a paved road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) collector road, which requires 80 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of- way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 39 is a paved road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) local road, which requires 60 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 41 is a gravel road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) local road, which requires 60 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 70 is a gravel road from County Road 31 to County Road 37, paved from County Road 37 to Highway 85, and gravel from Highway 85 to County Road 41. It is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) local road, which requires 60 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of-way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 43 is a paved road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) collector road, which requires 80 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of- way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. County Road 66 is a paved road and is designated on the Weld County Functional Classification Map (Code Ordinance 2017-01) as a(n) collector road, which requires 80 feet of right-of-way. The applicant shall delineate on the site map or plat the future and existing right-of-way and the physical location of the road. If the right-of- way cannot be verified it shall be dedicated. Pursuant to the definition of setback in the Weld County Code, Chapter 23, Article III, Section 23-3-50, the required setback is measured from the future right-of-way line. Be aware that physical roadways may not be centered in the right-of-way. This road is maintained by Weld County. The Colorado Department of Transportation (CDOT) has jurisdiction over all accesses to state highways. Please contact Tim Bilobran at the Greeley office (970-350-2163) to verify the access permit or for any additional requirements that may be needed. (State Highway 14 & State Highway 392) The Colorado Department of Transportation (CDOT) has completed a US 85 Planning and Environmental Linkages (PEL) Study. The objective of the US 85 PEL Study is to develop a strategic vision for US 85 between 1-76 and the Town of Nunn. Please review the US 85 PEL Study to ensure you are in compliance with the requirements. More information about this study can be accessed at: https://www.codot.gov/projects/us85pe1. Per Chapter 12, Article 4, Section 12-4-30.B, a Weld County Right -of -Way Use Permit is required for any project that will be occupying, constructing or excavating facilities within, and/or encroaching upon, any County rights -of -way or easement. Right -of -Way Use Permit instructions and application can be found at https://www.weldgov.com/departments/publicworks/permits/. Weld County will not replace overlapping easements located within existing right-of-way or pay to relocate existing utilities within the County right-of-way. ACCESS: The applicant will be required to submit an access permit application for both temporary and permanent accesses. Road classifications are listed above. Reference the classification to understand spacing criteria below. Commercial accesses are to be 24-36' wide and have turning radii of 60'. Table 12A.2 Minimum Access Spacing Criteria (Feet) Access Element Arterial Collector Local Distance between intersections Signalized Unsignalized 2,640 1,320 N/A 1,320 N/A 330 Distance between accesses and intersections 660 660 330 Distance between access points 660 330 150 Distance between access points in subdivisions 660 330 75 Per Chapter 12, Article 5, Section 12-5-30, an Access Permit is required for access to Weld County maintained roadways. We strongly encourage you to discuss your access with Public Works prior to laying out your site plan to ensure the approved accesses are compatible with your layout. For new accesses and/or change of use of an existing access, the fee and photos are required (photo looking left and right along roadway from the access point and looking in to and out of the access point). These photos are used to evaluate the safety of the access location. Access permit instructions and application can be found at https://www.weldgov.com/departments/public works/permits/. Chapter 6, Sections 6.3, 6.4 and 6.5 of the Weld County Engineering and Construction Criteria offer access design guidance, which can be accessed at: https://www.weldgov.com/departments/public works/engineering/. Appendix 12-A of the county code can also be referenced. Existing access points with change of use or new access points may or may not be granted. Questions pertaining to access permits or access design shall be directed to the Public Works Department. Application Fee: temporary $75, single residential $75, small commercial $75, industrial $150, field $0, large commercial $150, subdivision $150. This can be accessed at: https://www.weldgov.com/departments/public works/engineering/. For shared accesses, Public Works strongly recommends the property owner establish an access road maintenance agreement so future owners of the properties will be aware of their requirements for shared maintenance of the access road. This is not a requirement for the recorded exemption but is recommended to avoid property owner conflicts in the future. Per Chapter 12, Appendix 12A.4.1 of the Weld County Code, an access approach that is gated shall be designed so that the longest vehicle (including trailers) using the access can completely clear the traveled way when the gate is closed. In no event, shall the distance from the gate to the edge of the traveled surface be less than 35 feet. ACCESS CONTROL PLAN: The County Road 29 Access Control Plan has been developed to address access onto County Road 29 between State Highway 392 and County Road 100. More information about Weld County's access control plans can be located at: https://www.weldgov.comidepartments/public works/access control plans TRACKING CONTROL POLICY: Public Works is requesting tracking control for any permanent accesses or temporary accesses based upon the requirements below. Please use construction traffic counts for these requirements. Per Chapter 12, Appendix 12A.10.1, traffic volumes to the proposed facility may require the installation of a tracking control device and/or a minimum of four inches of compacted recycled asphalt or aggregate road base. Tracking control is required to prevent tracking from the site onto public roadways. Temporary Tracking Control shall be used during construction unless permanent tracking control is installed ahead of construction activities. Recycled concrete is not allowed in County right-of-way. Tracking control devices can be double cattle guards or rip rap (6" washed rock). Tracking control for unmaintained public right-of-way is required just prior to entering publicly maintained roadways. A variance request for alternatives to the tracking control requirement can be submitted to Public Works for review and consideration. Less than 20 passenger vehicle round trips/day, no upfront tracking control requirements. 20 to 50 passenger vehicle round trips/day or less than 4 truck round trips/day: • Access onto gravel roads includes 50 feet of road base or recycled asphalt. • Access onto paved roads includes 100 feet of road base or recycled asphalt. 4 to 10 round truck trips/day (tandem or semi -trucks): • Access onto gravel roads requires recycled asphalt or road base on all driving surfaces. • Access onto paved roads requires a tracking control device and a minimum of 100 feet of recycled asphalt/road base OR 300 feet of asphalt. (Surface improvements less than 300 feet may be allowed if site constraints would prohibit meeting condition.) More than 10 round truck trips/day (tandem or semi -trucks) or more than 50 round passenger vehicles trips: • Access onto gravel roads requires a tracking control device and a minimum of 300 feet of recycled asphalt or road base. • Access onto paved roads requires either a tracking control device and 100 feet of asphalt OR 300 feet of asphalt. TRAFFIC IMPACT STUDY REQUIREMENTS: When preparing the traffic narrative, please separate the `during construction' phase and the permanent phase. As part of the development review process, all new commercial or residential developments will be required to submit a TIS that is prepared, stamped, and signed by a professional engineer licensed in the State of Colorado, unless the TIS is waived by Public Works. Traffic Narrative: 1. Describe how many roundtrips/day 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) 2. Describe the expected travel routes or haul routes for site traffic. 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.) 4. Describe the time of day that you expect the highest traffic volumes. Public Works will review the narrative and advise the applicant if more information or an engineered traffic study is required. IMPROVEMENTS AND ROAD MAINTENANCE AGREEMENT: An improvements agreement may be required for the construction phase of the project. Public Works may require an Improvements Agreement for one or all the following reasons: S S • Off -Site Public Improvements Road Maintenance Agreement Construction Maintenance Agreement Access Improvements Agreement An Improvements Agreement is required for sites with required offsite improvements per Chapter 12, Article 5, Section 12-5-60. Collateral is required to ensure the improvements are completed, and maintained. Improvements/Road Maintenance Agreement: An example agreement is available at: https://www.weldqov.com/UserFiles/Servers/Server 6/File/Departments/Public%20Works/DevelopmentRevie w/sprusr.pdf. It will detail the approved haul route(s), outline when offsite improvements will be triggered, and include a maintenance agreement for the haul routes. Possible mitigations included in the road maintenance agreement may include but are not limited to: dust control, specified haul routes, damage repairs, and future improvement triggers. DRAINAGE REQUIREMENTS: Weld County has recently adopted a new stormwater drainage code located under Chapter 23, Article 12 Storm Drainage Criteria. A list of professional engineering consultants is available if you need help finding an engineer to assist you with your project at the following link http://www.co.weld.co.us/Departments/PlanningZoning/Engineering.html. Please contact the Department of Planning Services/Development Review Engineering for questions or assistance 970-353-6100. URBANIZING VS NON -URBANIZING DRAINAGE AREA►: The locations of the substations will require a Preliminary Drainage Report and detention pond design at application. Once the locations of the substations are finalized, please contact Hayley Balzano to determine if the sites are Urbanizing or Non -Urbanizing. Urbanizing Drainage Areas generally require detention of runoff from the 1 -hour, 100 -year, storm falling on the developed site and release of the detained water at the historic runoff rate of the 1 -hour, 5 -year storm falling on the undeveloped site. Non -Urbanizing Drainage Areas generally require detention of runoff from the 1 -hour, 100 -year, storm falling on the developed site and release of the detained water at the historic runoff rate of the 1 -hour, 10 -year storm falling on the undeveloped site. 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. To avoid holding up case processing, a minimum of either a preliminary drainage report or a drainage narrative with exception as shown below must be submitted with 7 -day case submittal information. Detention Pond Requirements: 1. A Drainage Report and Detention Pond Design shall be completed by a Colorado Licensed Professional Engineer and adhere to the drainage related sections of the Weld County Code. The Drainage Report must include a Certification of Compliance, stamped and signed by the PE, which can be found on the engineering website. A general Drainage Report Guidance Checklist is available on the engineering website. A Preliminary Drainage Report or a qualifying exception and Drainage Narrative shown below must be submitted for review at the time of the application. The locations for the transmission lines will qualify for exception 23-12-30.F 2. Drainage Narrative requirements with exception from detention pond. The Drainage Narrative must describe at a minimum: i. Which exception is being applied for and include supporting documentation 23-12-30 F.1.a. 5. Pipelines or transmission lines. ii. Where the water originates if it flows onto the property from an offsite source iii. Where it flows to as it leaves the property iv. The direction of flow across the property v. If there have been previous drainage problems with the property GRADING PERMIT: A Weld County Grading Permit will be required if disturbing more than 1 acre. Grading Permit applications are accepted after the planning process is complete (map recorded). An Early Release Request Form may be entertained only after the applicant and Planning Department have reviewed the referral and surrounding property owner comments. The Early Release Request may or may not be granted depending on referral comments and surrounding property owner concerns. Contact an Engineering representative from the Planning Department for more information. Application Fees: 1-5 Acres/ $50, 5.1 - 20 Acres/$100, 20.1 Acres or Greater/$200 + $1 per acre over 20. A Construction Stormwater Permit is also required with the State for disturbing more than 1 acre. Contact: Colorado Department of Public Health and Environment, Water Quality Control Division, Rik Gay, 303-692- 3575. GEOLOGIC HAZARD AREA: This site IS NOT in a Geologic Hazard Area. FLOODPLAIN: This site IS in multiple FEMA regulatory floodplain. A flood hazard development permit is required for any development in the floodplain. Contact the floodplain planner Diana Aungst at 970-400-3524. If the site requires a detention pond and the detention pond is located in the FEMA regulatory floodplain, the drainage report will be required to indicate how the detention facility will be maintained after a flooding event. SITE MAP REQUIREMENTS: A Site Plan will be required identifying the following (if applicable): o Show and label location of existing road, existing road right-of-way, future road right-of-way, and easements o Show and label the unmaintained section line right-of-way o Show and label location of the access(es) and label with access permit number o Show and label the access turning radii (Residential - 25' Commercial - 60') c Show and label the approved tracking control o Show and label location of drainage related features i.e. detention pond(s), ditches, etc... Detention ponds shall be labeled as "No Build/Storage Area" and include design volume o Show and label the drainage flow arrows showing how the stormwater flows across the property Show and label the parking and traffic circulation flow arrows showing how the traffic moves around the property for the substationse o Show and label the location of any floodplain boundaries (include permit number, floodplain type, map panel number and date) Please contact the following staff regarding the following Public Works issues: Access Permits: Morgan Gabbed mgabbertweldgov.com 970-400-3778 Improvements Agreements: Evan Pinkham epinkhamweldgov.com 970-400-3727 Traffic Studies: Dawn Anderson drandersonweldgov.com 970-400-3736 MS4 Areas: Lyndsay Holbrook Iholbrookweldgov.com 970-400-3788 Right -of -Way Permits: Amy Joseph ajosephweldgov.com 970-400-3764 Drainage: Hayley Balzano hbalzanoweldgov.com 970-400-3738 Planning Department Additional fees may be included with the Building Permit such as Road Impact, County Facilities and Drainage fees. Please refer to the handout provided. Screening of the parking area or outdoor storage may be required from any adjacent landowners or public rights -of -way. Weld County has a Coordinated Planning Agreement (CPA) with the Town of Ault and the Town of Severance. The Planning Director will contact the Town Managers to give notice of this pre -application meeting. Staff advised the applicants to contact the Town of Ault and the Town of Severance regarding possible land use permitting including possible annexation. Please identify any proposed lighting or signs on the Site Plan. Lighting needs to be downcast and shielded. A 16sf sign is allowed in the Agricultural Zone District; however if there are potentially any additional or larger signs please include those in the application. Prior to submittal of the County land use application, please submit evidence of State permits as in the case of Mining permits. The site is located in a designated FEMA floodplain. Flood Hazard Development Permits will be required. Please show and label the floodplain boundaries and the FEMA Flood Zone and FEMA Map Panel Number on the plat. Contact the Floodplain Administrator, Diana Aungst, at 970-400-3524 to discuss your project. Staff urged the applicant to contact staff for any questions: Planner on Call available Monday through Friday 7:30 a.m. to 4:30 p.m. or contact Chris Gathman at 970-400- 3537 or cgathmanweldgov.com . Applicant has requested that we explain why this requires a 1041. Chris said he would put the verbiage from Chapter 21 in the minutes. 1041 DEFINITIONS FOR SUBSTATIONS AND TRANSMISSION LINES: Section 21-3-20 of the Weld County Code contains the following definitions: Substation: Any facility designed to provide switching, voltage transformation or voltage control required for the transmission of electricity at 115 kV or greater. Transmission lines: Those electrical lines and appurtenant facilities which meet all of the following criteria: 1. Either a series of three (3) or more structures and appurtenant facilities erected above ground which support one (1) or more conductors or a power line placed underground. 2. Which lines emanate from a power plant or a substation/transition site and terminate at a substation/transition site. 3. Which are designed to transmit electrical voltages of 115 kV or greater. Substations and transmission lines that meet the above definitions require a 1041 USR. NOTICE & POSTING REQUIREMENTS: Per Section 21-3-330: The names and addresses of all surface property owners of the project site and within one thousand three hundred twenty (1,320) feet of the boundaries of the property proposed to be physically disturbed, except for transmission line or pipeline projects, for which the names and addresses of all surface property owners for five hundred (500) feet on either side of the centerline of the proposed alignment shall be provided. Per Section 21-2-260: applicants for an electric transmission line which is more than one (1) mile in length shall advertise the hearing at least once in the newspaper designated by the Board of County Commissioners for publication of notices a minimum of ten (10) days prior to the hearing date. The advertisement shall contain a map displaying the proposed alternative routes along with a description of the hearing time, date and location. The advertisement for an electric transmission line which is more than one (1) mile in length shall be the only requirement for notification of property owners, except as to notices which may be required by Section 24-65.5-103, C.F.S. Planning staff will post a notice sign at the location of the proposed substation sites per Section 21-2- 260: A sign shall be posted for the applicant on the property under consideration for such permit. The sign shall be posted adjacent to and visible from a publicly maintained road right-of-way. In the event the property under consideration is not adjacent to a publicly maintained road right-of-way, one (1) sign shall be posted in the most prominent place on the property and a second sign posted at the point at which the driveway (access drive) intersects a publicly maintained road right-of-way. The sign shall be posted at least ten (10) days prior to the hearing, and include the following information: a. Permit number. b. Date, place and time of public hearing. c. Location and phone number of the public office where additional information may be obtained. d. Applicant's name and address. e. Size of parcel of land. f. Type of request. Applicant plans on owning the property (approximately 30 acres) where the compressor stations will be located. Staff explained the applicant will need to apply for 2 recorded exemptions. Staff explained the recorded exemption process and gave the applicant the applications. In addition to addressing the submittal requirements outlined in Chapter 21 of the Weld County Code, the applicant will need to provide responses to the questions delineated in the USR application packet. The applicant indicated that they may install communication towers at one (1) or both substation sites. If this is the case, the applicant will need to address the criteria for towers delineated in Chapter 23, Article IV, Division 10 of the Weld County Code. Staff explained the 1041 USR process. The applicant shall submit 1 packet fora 7 day completeness review. After the 7 day completeness review the applicant will be informed of what items are still required to make the application complete. Staff requested that the applicant submit the remaining material in electronic form. Upon submittal of a completed application it will be sent out for referral for 28 days. The applicant will then meet with their Planner to discuss the referrals and address as many of the referrals as possible. At that meeting the Planning Commission hearing will be scheduled. The Board of County Commissioners hearing typically follows approximately 3 weeks after the Planning Commission hearing. The above notes are provided as a courtesy to the applicant. While we strive to help identify as many potential issues upfront during the pre application meeting we cannot anticipate every issue that may come up during the formal application process. The information contained herein has been placed on file with the Department of Planning Services. The pre -application is valid for a period of one (1) year from the date of pre - application. If a formal application is not received following the time period specified herein the Planning Department reserves the right to require a new pre -application meeting. Please note that all land use, building and impact fees are subject to change throughout this time period. End memorandum. XcelEnergy& RESPONSIBLE BY NATURE'm Northern Colorado Area Plan 230kV Transmission/Substation Project Appendix C: Environmental Protection Measures for Construction Projects 1 0 Xcel Energya RESPONSIBLE BY NATURE"" Northern Colorado Area Plan 230kV Transmission/Substation Project TOPIC STANDARD ENVIRONMENTAL PROTECTION MEASURES General G-1 The contractor Prior to and ecological shall comply construction, all supervisory resources. with all federal, state, construction and local environmental personnel will be instructed laws, orders, on the protection and regulations. of cultural G-2 Prior to construction, Project area and, in PSCo shall discuss with particular, those areas where the contractor areas a monitor must of be environmental sensitivity present during construction. within the Access Routes AR -1 No equipment 10 equipment. be construction feet deemed on and native If equipment too activities vehicles. surface wet to support If roads, or will equipment vehicles be construction the performed soil create during or vehicles shall ruts equipment. be in create deemed excess periods when the soil ruts in excess too wet to adequately of 1 inch deep of is too wet 4-6 inches support on graveled to adequately deep construction roads, support for a distance the roads shall of AR -2 Only the minimum safe and reliable be conserved and cleared from those maintenance equipment operation amount reused areas of soils of the as cover necessary and allow and vegetation transmission on disturbed to obtain for the safe line adequate operation areas necessary for will be disturbed. to facilitate working of the the maintenance of If excavation is re -growth of vegetation. width and turning radius transmission line. access necessary, space routes topsoil Vegetation for and the will will be AR -3 Water bars to: 1) simulate away from provide specification Water turn-off trails on hillsides on the the the disturbed bars to access imaginary roads area; for water or small prevent contour and bar terraces erosion will be lines 3) begin construction. shall and constructed of and be facilitate the slope end installed natural as specified (ideally in vegetation across revegetation by with all temporary PSCo. a or grade rock, of Water of 1 whenever construction the trails. bars to 2 will be constructed percent); 2) drain possible. PSCo access roads to and Aesthetics A-1 The operations in permanent protected the contractor shall so as vicinity of the construction from damage to exercise prevent work. Except roads, by care any the unnecessary where staging contractor's to preserve the destruction, clearing areas, or construction natural is required excavation operations landscape scarring, for operations, permanent and shall or defacing vegetation and ec works, ui Dment. conduct of the approved shall construction natural be surroundings temporary preserved or and A-2 The contractor resulting the contractor from to shall minimize construction operations. the satisfaction scarring, of defacing, damage, or destruction of Any unnecessary or unauthorized damage PSCo. the natural landscape shall be repaired by Agriculture AG -1 To the extent systems, the system. locating practical, the transmission structures at line will the edge of the be sited to avoid conflicts pivot where structures would with not center interfere pivot with irrigation operation of AG -2 PSCo will work with affected including transmission structure landowners in an effort to minimize adverse placement and other construction and operational effects on agricultural use, practices. Air Quality AO -1 The contractor prevent, and otherwise shall utilize minimize practicable atmospheric methods and devices as are reasonably available to control, emissions or discharges of air contaminants. AQ-2 Possible water construction to all disturbed -related dust areas along disturbance the right-of-way shall be controlled by the and access roads. periodic application of AQ-3 Vehicles and equipment other inefficient operating showing excessive emission conditions shall not be operated of exhaust gases due to until corrective adjustments poor engine or repairs adjustments or are made. AQ-4 Post reduce completion seeding wind erosion of mulch project will be utilized during reclamation and blowing dust. The activities to minimize mulch/stabilization potential activities at the will be fugitive dust generation discretion of the performed as soon as revegetation landowner as to possible occurs. help after Biological Resources BR -1 Vegetation extent construction. shall be practicable. Removal preserved and of brush protected and from damage by construction operations trees will be limited to those necessary for access to the maximum and BR -2 Disturbed potential areas where vegetation for soil erosion is increased has been removed to a detrimental by construction level will be activities subject to to seedbed the extent preparation that the 2 0 Xcel Energy RESPONSIBLE BY NATURE" Northern Colorado Area Plan 230kV Transmission/Substation Project TOPIC STANDARD ENVIRONMENTAL PROTECTION MEASURES techniques, planting vegetation reseeded with an approved season. Mulching shall establishment and growth. be applied seed mixture, and mulched(if only to those areas where necessary) during a recognized potential erosion would prohibit BR -3 The contractor river or shall not stream), except cross any at designated wetland locations and riparian designated areas (of or relating by PSCo. to, or located on, the banks of a BR -4 on required, facilitate completion so natural of that revegetation, the work, all surfaces all drain work areas, naturally, provide for except proper blend any with drainage, permanent the natural and access terrain, prevent roads/trails, and are erosion. shall be regraded, left in a condition that as will BR -5 All accepted disturbed by the areas, except landowner. the access route running surfaces, will be reseeded with seed mixes reasonably BR -6 All construction materials and debris shall be removed from the project area. BR -7 To (APP) preclude standards avian electrocutions developed and minimize collision risk, PSCo will incorporate by the Avian Power Line Interaction Committee Avian Protection Plan (APLIC 2012). Cultural Resources CR-1 Prior to construction, resources with reference cultural resource all supervisory to items are relevant discovered. construction laws and penalties, personnel will be instructed and the need to cease on work protection of cultural in the location if CR-2 Should any land -altering time that PSCo National Historic previously unknown activities at and the County Preservation that location is Act historic/prehistoric notified and will enabling be immediately and appropriate legislation. sites or artifacts suspended measures be encountered and taken the to during discovery left assure compliance construction, all intact until such the Fire Prevention/Control FP -1 Construction vehicles shall be equipped with government -approved spark arresters. FP -2 The contractor providers shall maintain in all construction vehicles a current list of local emergency response and methods of contact/communication. Hazardous Materials HM -1 PSCo shall comply promulgated regarding with all applicable toxic substances federal laws and or hazardous materials. regulations existing or hereafter enacted or HM -2 All reporting notifications fuel and fluid spills and response can within requirements. be made to this area regulatory will be handled The contractor authorities. in accordance with shall notify PSCo appropriate of any spills state so appropriate and federal spill HM -3 Any facility. hazardous material waste generated Solid waste materials statues and as a generated will be regulations. result of during handled the construction in proposed accordance action and with will periodic applicable be properly maintenance local, disposed state, of in a periods will and federal permitted be minimal. hazardous All Land Use LU-1 All activities take access and place approval routes associated with the construction, within the authorized limits of the or cross-country travel will by PSCo. operation, transmission not be allowed and maintenance line right- outside of of the transmission of -way and access routes. the authorized routes line will Additional prior to review LU-2 The fence, appropriate contractor brace landowner shall maintain all fences, brace panel, or gate damaged during construction or agency standards as panels, and gates will be determined by during repaired the the construction immediately by authorized officer. period. A.ny the contractor to 3 0 Xcel Energy RESPONSIBLE BY NATURE" Northern Colorado Area Plan 230kV Transmission/Substation Project TOPIC STANDARD ENVIRONMENTAL PROTECTION MEASURES LU-3 The contractor agricultural leveled, culverts, contractor. operations filled, terraces, The shall eliminate, and/or hazardous and graded, or otherwise local roads, land and facilities at the earliest opportunity, to movement eliminated and other similar shall be restored in land use as of an approved features nearly all vehicles construction as and equipment. manner. shall be practicable ruts corrected that Damage to their are detrimental Such ruts to ditches, as necessary original shall condition. to be tile drains, by the LU-4 Structure place foundation and will be holes will not strong enough to be left open prevent overnight livestock, wildlife, and will be or the covered. Covers public from will be secured in falling. Noise N-1 Construction equipped vehicles and equipment with manufacturers' standard shall be maintained in noise -control devices proper or better operating condition and shall be (e.g. mufflers, engine enclosures). Noxious Weeds NW -1 To performed. equipment recommended, of accumulations work minimize water introduction All heavy equipment storage facility. as on -site off of the site, across of mud `knocked site. All seed mixes of noxious weed utilized Washing of equipment washing of equipment an area greater off' instead. and mulch used during seed for sources construction increases than This method reclamation to prior to the size the will transport the of the promotes activities project area, be washed from one chance of weed work site. containment will be certified the prior work Equipment following to seed departure site dispersal of weed weed to measures will be from the another is not by drainage will have seeds on the -free. Soils and Geology S-1 The contractor loosened and with certified rate(s) of application leveled weed shall mitigate harrowing -free grasses will be soils compacted or disking and mulched determined to approximate (except by PSCo. by movement in cultivated of construction pre- construction vehicles contours fields). The specific and equipment and 2) reseeding seed mix(s) by 1) and S-2 Movement access routes. of construction vehicles and equipment shall be limited to the right-of-way and approved S-3 Excavated material the access routes shall then be regraded not used in the immediate to approximate in the backfilling vicinity of of the pre -construction poles pole shall structure, contours be spread or and around transported reseeded. each off site. pole, evenly Disturbed spread areas on S-4 Topsoil maintenance will be removed, stockpiled, access. and re -spread at temporarily disturbed areas not needed for Traffic T-1 The contractor shall safety standards and inconvenience to make all necessary shall conduct construction public traffic. provisions operations for conformance with so as to offer federal, the least state, and local possible obstruction traffic and Water Quality and Erosion WQ-1 Construction matter, contaminants water courses, restricted to, oil and other activities lakes, refuse, petroleum shall debris, and garbage, be and underground cement, products. performed other by objectionable water concrete, methods sources. sanitary that pollutants Such waste, prevent entrance and wastes pollutants industrial or into and wastes waste, accidental flowing include, radioactive spillage streams of solid or dry but are not substances, WQ-2 Dewatering or water Water intercepting work for structure courses shall and eroded materials ditches, bypass not be will channels, foundations performed be prevented or earthwork without from barriers, prior approval entering settling operations ponds, by PSCo the streams or other adjacent and approved or watercourses to, appropriate or encroaching methods. on, streams state agencies. by constructing WQ-4 Excavated material or other construction materials banks, lake shorelines, or other water course storm runoff or can in any way encroach upon shall not be stockpiled perimeters where they the water source itself. or deposited can be washed near or on stream away by high water or WQ-5 Waste without flocculating approved settleable during waters use methods. material. a 1 -hour from of such processes quiescent construction turbidity that Any such Settleable operations control are not waste material period. shall not enter methods as settling harmful to fish, recirculation waters discharged into is defined as that streams, water courses, ponds, gravel -filter entrapment systems for washing surface waters shall material that will settle from or other dikes, of aggregates, be essentially the water surface approved free by waters or other of gravity WQ-6 A Storm reconstruction Water Management activities. The Plan shall be developed, plan shall conform with if required, all U.S. to address all EPA and BMP requirements. construction and 4 OP Xcei EnergyA Northern Colorado Area Plan 230kV Transmission/Substation Project Appendix D 2017 Biological Resources Report LOGANSIMPSON December 14, 2017 Erin Degutis Xcel Energy Senior Agent, Siting and Land Rights 1800 Larimer Street, 4th Floor Denver, CO 80202 Subject; Biological Survey Results Dear Erin, Introduction and Purpose Two Logan Simpson biologists (team) conducted a biological reconnaissance survey of the WAPA Ault Substation to Husky Substation alternative routes on December 7, 2017 from 9:00 to 13:30. The purpose of the survey was to provide data to inform siting decisions and to satisfy NEPA requirements for this phase of the proposed project. The focus of the survey was to identify historic raptor nests, record wildlife observations, and provide field confirmation of wetland areas previously identified with desktop analysis and National Wetland Inventory (NWI) data. In addition, the team recorded several infrastructure observations for possible consideration in siting decisions. Methods Surveys were primarily conducted from the vehicle on public roads or private roads for which the landowner had granted access permission. In one wetland area (described in detail below), the team walked around an accessible part of the wetland to improve observation. The survey area was generally within 0.5 mile of the alternative centerlines, as access and observation points permitted. A 0.5 mile distance was selected to include habitat within the construction exclusion zone for raptor species with potential to nest in the area. Maps of the survey area were plotted on high resolution aerials, saved as GIS background files, and loaded onto a Trimble Juno GPS unit for navigation and data collection purposes. Nikon Monarch 10.5 X 45 binoculars and a Leupold 20 X 60 spotting scope were used for visual observations. Photographs were taken with a cell phone and a Canon 20X zoom camera to document observations. a a S ivy LOGANSIMPSON Results The survey area consists of highly fragmented rural and agricultural land. Scattered structures including residences, farm buildings, fences, silos, center pivot, and other irrigation systems are present throughout. Both small and large irrigation canals traverse the survey area. Large trees in the area are typically associated with human habitation, located along roads and near homes and farms. Other existing infrastructure in the survey area includes paved roads, non -paved roads, transmission systems, oil and gas wells, storage tanks, pipelines, and water wells. The U.S. Fish and Wildlife Service National Wetlands Inventory (NWI) dataset identifies five features within the survey area. These features include: • 2 Riverines • 1 Freshwater Forested / Shrub Wetland • 1 Freshwater Emergent Wetland • 1 Freshwater Pond After observing these features in the field it was determined that the two NWI riverines are human constructed irrigation canals used for agricultural purposes (dry at time of survey). The freshwater pond (NWI-1) and freshwater emergent wetland (NWI-2) are connected as part of the same constructed pond area which at one time pulled water from the adjacent irrigation canal. The pond area, which has a constructed dam on the eastern edge, was dry at the time of survey but had signs of recent saturation (possibly from the spring season). Vegetation in the western portion of the area near the canal (NWI freshwater emergent wetland) was dominated by plains cottonwood (Populus deltoids), willows (Salix sp.), cattails (Typha sp.) and tall unidentified grasses. Vegetation in the eastern portion of the area towards the dam (NWI freshwater pond) primarily consisted of tall grasses. The NWI classified freshwater forested / shrub wetland located northwest of the irrigation canal and constructed pond area contained two distinct depressions (Photographs 6 and 7) that were dry at the time of visit but showed signs of standing water earlier in the year. Vegetation on this site was not easily identifiable but did contain sedges (Carexsp1) which are commonly associated with wetland areas. Additionally, two potential wetlands not included in the NWI dataset were identified within the survey area. The first (WF-1) is located adjacent to the eastern irrigation canal on private property near a residence (Photograph 1). Vegetation on this site consisted of plains cottonwood, willows and tall unidentified grasses. The second (WF-2) is located south of CR 86 a a S VT, LOGANSIMPSON on a parcel owned by the City of Thornton and contained standing water at the time of the field survey (Photograph 2). Although a formal delineation was not completed, the wetland features are small enough to make avoidance of any disturbance realistic through careful structure placement. Avoidance of direct disturbance would eliminate the need for obtaining a Section 404 permit and associated mitigation requirements. Vegetation in the survey area primarily consisted of cultivated agricultural land and pastures. Ornamental trees and shrubs were present around homes and buildings. A total of five wetland or potential wetland areas were documented during the survey. Table 1 and Figure 1 present these features. Table 1 Wetland and Potential Wetland Features in the Survey Area Feature Location Areal Potential wetland area (WF-1) 40.605224, -104.782439 2.48 acres Potential wetland area (WF-2) 40.611026, -104.788937 0.55 acres Dry pond area (NW I-1) 40.604616, -104.801802 6.93 acres Potential wetland area (NWI-2) 40.604816, -104.804593 1.52 acres Potential wetland area (NWI-3) 40.605933, -104.805444 1.22 acres Area was determined in GIS using aerial imagery and is approximate N � AI' Y LOGANSIMPSON Figure 1 General Overview of Observed Potential Weltand Areas in Survey Project Area Figure 2 General Overview of Observed Raptor Nests in Project Area a S rfly LOGANSIMPSON In addition to wetland areas, two wooded areas with good potential wildlife habitat were documented. These areas were associated with water, including proximity to canals. Woody vegetation with structural variety would be expected to attract a greater diversity of wildlife species. A total of eight mule deer (Odocoileus hemionus) were observed in the western portion of the wetland area (NWI-2). It is suspected that this small herd is fairly isolated at this location. No connectivity habitat was apparent and the landowner immediately north of the wetland area maintained a deer hunting blind and other hunting equipment adjacent to the wetland area. A variety of raptor and other avian species inhabits the vegetative communities in the survey area. Suitable nesting, foraging, migration, and winter habitat exists throughout. Table 2 presents raptor and representative migratory bird species with potential to occur in the survey area at some point in their annual life cycle. This survey was conducted outside the breeding and migration season for avian species in northern Colorado. It was expected that many avian species that could occur in the survey area would not be observed during this time. However, it was advantageous to be able to identify stick nests in trees after leaf drop. Table 2 Raptor and Migratory Bird Species with Potential to occur in the Survey Area Common Name Scientific Name Nesting Habitat Season of Use Raptor Species American kestrel Falco sparverius Cavities in trees and human -made structures Year-round Barn owl Tyto alba Variety burrows of in habitats walls of including dry washes old buildings and a Year-round Burrowing owl Athene cunicularia Mammalian burrows Breeding season Cooper's hawk Accipiter cooperi Stick nest in trees Year-round Eastern screech -owl Megascops asio Tree cavities Breeding season Ferruginous hawk Buteo regales Stick nest in trees, on rock outcrops Year-round Great horned owl Bubo virginianus Variety human of -made habitats structures including trees and on Year-round Long-eared owl Asio otus Edge habitat in tree stands or dense shrubs Year-round Northern harrier Circus cyaneus Ground nest in grassland and agricultural land Year-round Northern rough -legged hawk Buteo lagopus Breeds elsewhere Winter Red-tailed hawk Buteo jamaicensis Stick nest in trees Year-round Short -eared owl Asio flammeus Nests agricultural on the ground land in grassland and Year-round Swainson's hawk Buteo swainsoni Nests in trees in grassland and agricultural land Breeding season Representative Non -raptor Species American tree sparrow Spizella arborea Breeds elsewhere Winter Barn swallow Hirundo rustica Mud nest on human -made structures Breeding season Black -billed magpie Pica hudsonia Stick nest in trees and shrubs Year-round Canada goose Branta canadensis Ground nest near water bodies Year-round Eurasian collared -dove Streptopelia decaocto Small stick nest in trees Year-round Horned lark Eremophila alpestris Ground nest in grassland and agricultural land Year-round Killdeer Charadrius vociferus Ground nest in variety of habitats Breeding season Lark sparrow Chondestes grammacus Ground nest in variety of habitats Breeding season 0 0 S ivy LOGANSIMPSON Table 2 Raptor and Migratory Bird Species with Potential to Occur in the Survey Area Common Name Scientific Name Nesting Habitat Season of Use Northern flicker Colaptes auratus Cavity nest in trees Year-round Red -winged blackbird Agelaius phoeniceus Wetland and cattail habitat Year-round Western kingbird Tyrannies verticalis Trees in a variety of habitat types Breeding season Western meadowlark Sturnella neglecta Shrubs in grassland and agricultural land Year-round A total of four stick nests were documented in the survey area (Table 3 and Figure 2). It was not possible to identify which species used the nest in 2017, if any►. It is common for raptor nests to be used by different species, including non -raptors, in different years. For example, most owls do not construct their own nests; they use previously constructed nests or burrows. No owl or eagle species were observed during the survey; however, anecdotal reports were provided by a landowner that indicated presence of a barn owl on the property► and a bald eagle observed flying over the property. Raptor species typically exhibit high fidelity to nests and nesting territories. For this reason, it is useful to identify historic raptor nests even while they are not active. New raptor nests can be constructed each year and historic nests may go unused. In order to comply with the Migratory Bird Treaty Act pre -construction nest surveys for raptors and other avian species would be conducted no sooner than one week prior to disturbance. Timing and distance buffers that are appropriate for the species would be applied to any active nests. If any► nests are observed during the pre -construction nest survey, monitoring by a qualified avian biologist would be conducted until the nest fledges. Pre -construction nest surveys and monitoring would be coordinated with Colorado Parks and Wildlife and the U.S. Fish and Wildlife Service. These agencies are responsible for protection of raptor and other avian species and have the authority to establish or adjust timing and distance stipulations according to conditions in the field. Raptor sensitivity to noise and human disturbance varies by species and individual. Table 3 Historic Raptor Nests in the Survey Area Nest Location Distance from Centerline N-1 40.504351, -104.753940 42 feet N-2 40.596524, -104.740651 0.36 miles N-3 40.609578, -104.746371 0.64 miles N-4 40.503909, -104.801387 50 feet A total of nine avian species were observed during the survey: 1 male American kestrel, 10 American tree sparrows, 2 black -billed magpies, 500 Canada geese (appx.), 2 Eurasian collared- a a S VT, LOGANSIMPSON doves, 40 horned larks (appxj, 3 female northern harriers, 50 red -winged blackbirds (appxj, 6 red-tailed hawks, and 2 western meadowlarks. One small active black -tailed prairie dog (Cynomys ludovicianus) colony was documented, which could serve as nesting habitat for burrowing owl. In addition, prairie dogs are an important prey species for raptors and other predators. This colony was located at 40.611259° N, 104.778541'W (PC -1„ (PC -1, Figure 3), and was approximately 3 acres in size. Figure 3 General Location of Prairie Dog Colony in Project Area Respectfully submitted, Julie Capp Certified Wildlife Biologist Certified Audubon Master Birder Logan Simpson David Casey Balthrop Biologist Logan Simpson Attachment A: Representative Photographs View of Potential Wetland Feature (WE-i) (40.605384, -104181688) 70( cr- First Depression in Potential Wetland Area (NWI-3) (40.605731, -104.804731) Photograph 7 — Second Depression in Potential Wetland Area (NWI-3) (40.605933, 104.805444) 4 View of Raptor Nest (N-2) (Species Unknown) (40.596524, -104J40651) View of Raptor Nest (N-4) (Species Unknown) (40.603909, -104.801387) Photograph 10 —Red-tailed Hawk Perched on Tree in Survey Area (40.610946, -104.777064) LOGANSIMPSON Photograph 11 -View of Black -tailed Prairie Dog Colony in Project Area (approximately 3 acres) (40.610946, -104.777064) Photograph 12 - Fire Hydrant approximately 1 mile west of existing VVAPA Ault Substation on CR25 (40.605118, -104.831711) (potential indication of future housing development) OP Xcei EnergyA Northern Colorado Area Plan 230kV Transmission/Substation Project Appendix E 2016 Raptor Nest Survey Report y L 00G ANS IS P S ON July 27, 2016 Liz Kirkpatrick Xcel Energy Senior Agent, Siting and Land Rights 1800 Larimer Street, 4th Floor, Denver, CO 80202 Subject: Transmission Line Routing Project Dear Liz: Logan Simpson biologists conducted a raptor nesting and habitat evaluation survey of the Weld County Transmission Line project on July 13, 2016. The purpose of the survey was to provide preliminary data regarding the presence of active raptor nests and suitable raptor nesting habitat associated with the transmission line alternative routes and potential substation locations. The raptor nesting and habitat evaluation survey was conducted as a vehicle search of the project area. Prior to conducting the survey, Logan Simpson biologists created project area maps with alternative transmission line routes highlighted, and applied a construction buffer of a5 mile on each side of the transmission line centerlines and 0.5 mile outside the boundary of the potential substation location. The 0.5 mile buffer reflects the maximum typical construction exclusion buffer for nesting raptors (with the exception of bald and golden eagles). The transmission line alternatives and substation locations with the applied buffer established the survey area. These maps were plotted on high resolution aerial photographs, saved as GIS background files, and loaded onto a Trimble Juno GPS unit for navigation and data collection purposes. The survey was conducted by traveling public roads throughout the survey area, and along transmission line routes whenever possible. The survey area was evaluated for potential suitable nesting habitat and observation points were established when raptors were observed within the survey area. Suitable raptor nesting habitat can consist of a variety of vegetation including grasslands, tall trees, and dead tree snags, as well as structures such as energy transmission line poles and abandoned buildings. An evaluation of the survey area found that suitable raptor nesting habitat exists throughout. The majority of the open lands within the survey area are cultivated agriculture fields consisting of crops that include corn, beets, cabbage, wheat, and barley. Agriculture fields provide foraging habitat for raptors but are not suitable nesting habitat due to the high frequency of disturbance. Unimproved pastures are also located within the survey area and are suitable nesting habitat for species such as northern harrier (Circus cyaneus) and western burrowing owl (Athene cunicularia). Existing transmission lines are located throughout the survey area including single pole, h -frame, and lattice tower structures. All of these structures are suitable nesting habitat for a number of raptor species including a variety of hawks. While the survey area is B East Broadway Suite 300 Salt Lake City, Utah 84111 Phone: 801.364.0525 Fax: 801.364.0676 www.logansimpson.com XCel Energy Services Inc. Weld County Transmission Line Routing July 2712016 1 2 primarily an open agricultural landscape, stands of trees planted as windbreaks, irrigation canal bank stabilization, and associated with residential properties, are located throughout the survey area. Large, heavily foliated trees in the survey area provide suitable nesting habitat for species such as great horned owl (Bubo virginianus) and smaller hawks including sharp shinned hawk (Accipiter striates) and cooper's hawk (Accipiter cooper! . Large trees within the survey area with an open structure or defoliated and dead branches are typically more appropriate nesting habitat for larger hawks such as red-tailed hawk (Buteo jamaicensis), Swainson's hawk (Buteo swainsoni), and ferruginous hawk (Buteo regalis). Lastly, trees in the survey area that have existing cavities, dead branches, and dead trunks provide suitable nesting habitat for cavity nesting raptors including American kestrel (Falco sparvarius) and eastern screech -owl (Otus asio). Nesting American kestrels and barn owls (Tyto alba) may also be found in abandoned buildings and farm and ranch outbuildings. Foraging raptors were observed throughout the survey area during the survey period. A complete list of raptors and migratory birds observed during the survey is provided in Table 1, below. Table 1. Avian species observed during project area raptor surveys. Common Name Species Red-tailed Hawk Swainsonis Hawk Prairie Falcon American Kestrel Killdeer Western Meadowlark House Finch Western Kingbird Red -winged Blackbird Barn Swallow Tree Swallow Mourning Dove Buteo jamaicensis Bute() swainsoni Falco mexicanus Falco sparverius Gh ara drius vociferus sturnella neglec to Haemorh uus mexicanus Tyrannus verticalis Agelaius phoeniceus Hirundo rustica Tachycineta bicolor Zenaida i a macroura The prairie falcon was observed foraging within a pasture in the northernmost extent of the survey area. Prairie falcons typically nest on cliff ledges, dirt banks, and occasionally use abandoned raven nests. However, prairie falcons are uncommon breeders in this region. The bird was solitary and there were no signs of suitable prairie falcon nesting habitat observed within the survey area. Logan Simpson biologists also observed adult and juvenile red-tailed hawks foraging within the northern portion of the survey area. The birds were observed roosting in several trees and hunting over pastures. The presence of an adult and juvenile suggests a nearby nest. Once a juvenile hawk has fledged the nest, the adults and juvenile tend to remain close (within approximately 0.25 mile) to the nest tree as the juvenile becomes more proficient at flying and hunting. However, the birds will no longer actively use the nest. Logan Simpson biologists were not able to determine the location of the nest, but the behavior of the birds suggests the nest tree was north of and out of the survey area. Swainson's hawks were also observed hunting within agricultural fields and perched on transmission line structures throughout the survey area. XCel Energy Services Inc. Weld County Transmission Line Routing July 2712016 1 3 While many raptor species exhibit nest fidelity, active nests during the 2016 raptor nesting season may be inactive or occupied by a new species during subsequent seasons. Similarly, suitable nesting habitat that did not have detectible nests during this survey period may have active nests during future breeding seasons. Once a preferred project route and substation locations are selected, pre -construction raptor and migratory bird nesting surveys should be conducted no later than one week prior to the start of construction. Nest monitoring surveys should continue throughout any construction activity occurring within nesting season. All raptors and most migratory birds have mandatory construction buffers that must be established around active nests during construction activity. These buffers are specific to the species and under specific circumstances may be adjusted according to the existing conditions and construction activity. For example, the recommended buffer zone and seasonal restriction for an active red tailed hawk nest is 0.33 mile during the period February 15 through July 15. If you have any questions or concerns regarding this survey report, please feel free to contact us at any time. Sincerely, Alyson S. Eddie Senior Biologist OP Xcei EnergyA Northern Colorado Area Plan 230kV Transmission/Substation Project Appendix F Emergency Management Plan Responding to Utility Emergencies COIMIIMNJ NDINMISDpTXIWI Xcel Energy You're first on the scene. What's next? As an emergency responder you do everything possible to keep your community safe. But if the situation involves electricity or natural gas, do you know how to keep the public and your team safe? Utility emergencies present unique dangers to recognize and handle. Knowing about them and specific actions to take can lead to better results and, ultimately, to saved lives. Responding to Utility Emergencies (RTUE) Online (https://Xcel-Energy.RlUEonline.com) can effectively bridge the knowledge gap. It complements your department's training program, and gives you new information. It also provides a refresher about working safely during a utility emergency. RTUE Online offers access to effective interactive training based on national standards. It includes learning objectives and application activities to educate and engage all types of responders, including firefighters, police officers and other emergency personnel. Training can be tracked and a certificate will be offered upon completion of the course. Xcel Energy •wRM nw i�w tl� s• •.rose+ Electrical Emergencies Natural Gas Emergencies Final Assessment Resources V Lea It tligfatc I lealbact Responding to Utility Emergencies almoner "Great class, great break dowry. Very helpful. Thank you! This should be implemented in FF1 Welcome to Ycel Energy's Emergency Responder Awareness Training Website The public safety officer rsz o n the scene. when utdities are danaged. avhether :n response to a downed power line duo to a vehicle accident oral excavator- diain. in:o a natural gas p peiine. ::(cei Energy is providing this website to heEp er ergency responders re-co=nize potential lazards Envolving electricity, natural gat and the ne:tsar} gsildelhes'to assure their safety and that of :he genera! public. Reg,iater or Login to enter our:raining. tt fil-haeninp Officers r oo n or Register !l0 access your Training Toolrsos Lo>?i n or Rester above, then select your training track below Fl RE ! RESCUE Increase your knowledge of how to respond :a a utility emergency. LAW ENFORCEMENT Lear ,oar, to assess ti-& r=_ -is azzoc-atec wir a u:•li rry .inergercy Are you Street -Smart or Book - Smart? All lire ❑ line ❑ ch2r Eid ❑ N.-2rg'ed ❑ AD of the above check your anr.%e r COMMUNITY AWARENESS krrowi.edge and preparation can impact :he outcome_ ofattisitj emergency. 4 htips://Xcel-Energy.RTUEonline.com For more information please contact Publicafetyxcelenergy.cam. "Nice work, you should be proud of this valuable safety training tool ... Best tool I've seen so far in my career as a fire fighter (24 years) and utility professional (31 years)." UTILITY SAFETY CONSULTANT AND MINNESOTA FIREFIGHTER This awareness training program is provided to you compliments of Xcel Energy. i Responding to Utility Emergencies CO MI MN ND NM 5D TX WI Also, ATUE Online is continually updated to ensure you have relevant, real-time information. The course incorporates interactive media and features former fire captain and nationally -recognized author Mike Callan. IIMPlll map 111%4%1A rill bn. ergencies iectricity About Mike Callan Mike Callan is a 40 -year veteran of the fire service, serving 20 of those years as a Captain with the Wallingford, Connecticut Fire Department. In 2013, Mike was awarded the John M. Eversole Lifetime Achievement Award to recognize his distinguished career in hazardous materials emergency response. In addition to Responding to Utility Emergencies, Mike has written numerous training and instructor guides and conducts safety, chemical and emergence response programs for industrial and municipal hazmat teams throughout the U.S. Mike is passionate about accident prevention through education, and most importantly, about saving lives. Want to learn more? Please visit us at https://Xcel-Energy.RTUEonline.com or contact us at PublicSnfety@xcelenergy.com. Xcel Energy® RESPONSIBLE BY NATURE& IIT1X.IXE 1TO VI[OL:VEG11c GD mus.ca➢ IL:1111 n1 C40 ft !ROCIK Hc. Mra •�N:IIq]IY .t.,:AC]IY orwcomatt 11I.II IIV Kn 001104013411 NMI Jvc cttKflc FCF416NO W I IAkI atm .V.Tu...!•w. ruwwlra.n •, p _ RESPONUIIIli TO UTILITY 139ERG£NCIES . r WYI D csal NIS I IEYXYII RESP&NDINCTO UTILITY Eh1ERCEUCIES ; _6 LLUI r I Ij .j's + W54M1H1 l911T1LL-I:.l11UITL'l1I_'LYIICUtS I LWWI 0nwoILTOX rD Or®7SYASI5 [ICI 1erg IICSncrsTc rrtccgg6d1 To L$Wt:TIEI MES It! :MOW 1p c'Dc4WM I necu Y I tflUWIIATIMLGA': iAIULGi: GAS Are nrrAL•, fnurnrrve II-m..:nk•--,rk.'r:,• Y..'n-rn-n.:diary7'ar we., Ibr, Th. 0. drkt Step 3: Evaluate Hazards St Risks Hazard Assessment • What are the dhysicsl and chemical prs.penif s C natumi gas? •'Where is it in the Ilammate range? • What are the iinitior tsmoera¢ure and igritian '.d'urc a:.9 • Villa] is the sollir,P and size n' ;he release'? • Hc?? *nil nay we gas Deel tearing aicelEnery,v• XcerEner• Inroxn L+ I, .0 _ l I R9cIrlSS Ai;c:;imR Risk Assessment 14`.h3: ara Cate nis exgosuras? ute: rraper:y; cm iranhienr • 'Mere is :he- locality: c•1 the release? • is tre eak inside cc ousrde'r Training tracks for fire/rescue and law enforcement cover: Understanding Electricity ■ The Electrical Grid Responding to Electrical Emergencies Understanding Natural Gas Responding to Natural Gas Emergencies "Hello, My Name is Chief Wes Williams with the Ruggles —Troy Volunteer Fire Department in Nova, Ohio. I am writing to let you know that this site will be beneficial to ALL emergency first responders. The site is user friendly as well as informational without losing your interest. Job well done!" xcelenergy.com © 2016 Xcel Energy Inc. I Xcel Energy is a registered trademark of Xcel Energy Inc. 16-03-123 Substation fire response The overall mission of an emergency response involving Xcel Energy substations is always to: 1. Protect lives. 2. Establish a protective perimeter around the substation, protecting surrounding structures: DO NOT enter or extinguish any substation equipment until given authorization by Xcel Energy substation personnel. 3. Assist Xcel Energy in efforts to stabilize the incident, as directed/needed. Responders must use extreme caution around high voltage areas due to the severe electric hazards. High voltages in these sites can exceed 500,000 volts, or 500 kilovolts (kV), and operating amperages (A) of 1000A or more. Substations contain transformers, circuit breakers, switch gear, capacitors, bus bars (large diameter, non -insulated metal conductors) and large banks of batteries to control power in control rooms. Electrical emergencies at Xcel Energy substations should be approached cautiously. Responders should wait for Xcel Energy personnel to arrive before initiating any type of offensive actions (see note 2 above). Since there is extreme risk to responders during high voltage emergencies, decisions must be made by the emergency services incident command in conjunction with Xcel Energy's incident commander. Unified command is critical in these types of operations. Caution Substations can have a great deal of oil. It is used for coo ing transformers and as an arc suppression agent while opening a circuit breaker. In some facilities the oil reservoir can be very large, or stored indoors. When there is a fire or damage to oil -cooled equipment, an oil spi I can result. Regular hazardous materials tactics can be employed if the area is free from any energized equipment. Most utilities have eliminated the polychlorinated biphenyl (PEW!) problem in their cooling oils; however, the real hazards are the f ammability of heated oils and the ever-present danger of energized equipment. Emergency numbers IMPORTANT: These numbers are for emergency responders only. DO NOT release these numbers to the public! Ensure that 911 dispatchers do not transfer calls to our Emergency Response Line. Life -threatening Electric emergencies 800.641.4400 Natural gas emergencies 800.541.8441 Non life -threatening Emergencies or Essential Services Outages 800.771.7300 General public numbers Xcel Energy electric outage 800.895.1999 Xcel Energy gas emergency/gas odor 800.895.2999 Xcel Energy residential customer service 80 0.895.4999 )(eel Energy business solutions center 800.481.4700 TDD/TYY (hearing -impaired service) 800.895.4949 xcelenergy.com/Safety Xcel Energy RESPQNSIBLE BY NATUREe xcelenergy.com I © 2017 Xcel Energy Inc. I Xcel Energy is a registered trademark of Xcel Energy Inc. 117-02-633 0 Xcel Energy° Fire safety response for substation emergencies Any operation involving Xcel Energy substations requires de -energizing the affected equipment and isolating of the surrounding area. If entry is deemed necessary by a unified command team, emergency personnel should be guided by Xcel Energy substation electricians. Unified command at utility emergencies In large incidents, it is common to use a modified incident command structure, called unified command, whereby representatives from both the emergency services command and utility companies work together. They share information and coordinate personnel to develop an overall action plan that best solves the problem. The unified command team develops an incident action plan that uses agreed -upon strategies and tactics to accomplish the mission. n high voltage emergencies involving an electric substation or a generation plant, the unified command process is the only way to guarantee success and assure the safety of all responders and utility personnel at the scene. Unified command at utility emergencies provides a joint method for incident management teams to: • Determine incident priorities and identify strategic goals • Select tactics for achieving the strategic incident goals and priorities • Ensure joint planning for objectives and tactical activities • Allow joint tactical operations to be conducted • Maximize the use of all assigned resources • Provide a method for resolving conflicts among the team players Decision making for high voltage/substation emergencies The initial task during high voltage emergencies involving Xcel Energy substations is to determine the tactical action plan. This is done by assessing the incident's potential. The incident commander (IC), based on input from the Xcel Energy, should estimate the likely outcome of the emergency and select the overall operating strategy to favorably impact this outcome. Pre -planning for substation emergencies will help identify response strategies and tactics, as determined by representatives from both the emergency services and local utility companies, like Xcel Energy.. The absence of a preplan for a substation or generation plant emergency raises the risk of disaster and injury. a.� -40 iit.c, f ti. a ; r Pre -planning questions What type of incident is it? Is it a generation substation or distribution substation incident? Is the equipment visible from the outside, or is it inside a surrounding wall or building? Are all safety considerations identified? Have all electrical safety hazards or considerations associated with the event been identified? Has the site been de -energized and verified by Xcel Energy substation electricians? Can the emergency area be isolated from electricity, and is it of a magnitude that would allow operations without fear of runoff, steam or extinguishing agent contacting energized equipment and causing an arc? Is there an electrical hazard still present? Even though the immediate area has been de -energized, equipment nearby may remain energized. What is the location of the incident? Is the substation in a rural or remote outside area (perimeter chain link fence), in a populated area (perimeter "fence" limiting view inside), or in the heart of the city (potentially inside a building)? What is the external public impact? Has Xcel Energy addressed the informational needs of the emergency services, the impact on the public and what will be necessary to lessen the public's fear, imposition and loss of power? Xcel Energy's communications team is ready to respond. Are there any other hazards present? Could there be an explosion, structural instability due to earthquake, mechanical equipment or hazardous materials present. In many substations there is combustible oil used to cool the circuit breakers and transformers. This hazard can create large flammable liquid fires outside and inside the substation. Can the incident escalate? What could possibly happen that would make this incident worse and has it been addressed? Can oil in transformers ignite or explode? Will the oil flow through duct openings or travel to lower floors? Strategy and tactics for substation emergencies Strategy is the overall goal of the response effort. Strategies are general in nature, such as life safety, incident stabilization, environmental impact and utility service restoration. Examples of common strategic goals at utility emergencies could include the following: • Rescue (if possible and can be done safe y) • Public protective actions (isolate downed wires, arc safety and downwind evacuation) • Preventing cooling oil from impacting the environment • Controlling the spread of oil around the substation • Fire suppression and control • Safety during restoration operations Tactics are action specific and they are implemented to achieve the strategic goals. Tactics could include: • Protecting in place vs. evacuating • Use extinguishing agents rather than water spray • Cooling exposures from radiant heat Operational modes Mitigating a utility emergency must be implemented in an overall operational mode. The three modes are non- intervention, defensive and offensive. Criteria for evaluating operational modes include: • Level of available resources (e.g. personnel and equipment) • Level of training and capabilities of emergency responders • Potential harm created by the incident Nonintervention "No action" is taken. The risks of intervening are unacceptable when compared to the dangers of fighting the electrical fire. All personnel are withdrawn to a safe location. Defensive Conditions indicate that the defensive actions chosen will buy time, enabling the response effort to be directed towards limiting the overall spread of the problem. Offensive The offensive mode must never be initiated without Xcel Energy substation electricians present to advise the responder. All operations must be done in conjunction with, and under the direct supervision of substation personnel. OP Xcei EnergyA Northern Colorado Area Plan 230kV Transmission/Substation Project Appendix G Graham Creek Substation Preliminary Drainage Assessment Memo Date: Monday, June 18, 2018 Project: Graham Creek Substation To: Xcel Energy From: HDR, Inc. Subject: Graham Creek Substation Preliminary Drainage Assessment Introduction A preliminary drainage assessment has been performed for the Graham Creek Substation (Project). The assessment provides recommendations for permanent stormwater management and conveyance features. The Project area is approximately 7.8 acres and will introduce approximately 2.5 acres of graveled substation and access roads. The site is located south of Weld County Route 76 east of Weld County Route 33 in an unincorporated portion of Weld County, Colorado. Weld County (County) has adopted the Urban Drainage Flood Control District (UDFCD) Drainage Manual (Manual) with an amendment to serve as the County's drainage criteria. The additional criteria is detailed in the Weld County Charter and Code and within the Weld County Engineering & Construction Guidelines (Guidelines). This drainage analysis quantifies the peak discharge rate from the site prior to development, and the peak discharge rate of the proposed design. The current design incorporates an Extended Detention Basin (EDB) to capture and treat the Water Quality Capture Volume (WQCV) and the Excess Urban Runoff Volume (EURV), and to release the 100 -year detention volume at a rate lower than the pre -developed 10 -year peak discharge rate, per the County requirements for a non -urbanizing region. The EDB should be designed in accordance with the Manual and the Guidelines. The Project is not located within and does not impact any designated Floodplains or Floodways. Runoff Calculations The runoff calculations utilized the Rational Method, following the criteria recommended by the Manual and the Guidelines. The Runoff Coefficients, Rainfall Intensities and Times of Concentration were calculated using the UDFCD Rational Method Spreadsheet. The imperviousness of each land use was assigned according to Table 6-3 in the Manual. One -hour rainfall depths for the town of Greeley were acquired from Table 5-1 in the Guidelines. The town of Greeley data was used due to its proximity to the site. The rainfall depths are presented in Table 1 below. Table I. Weld County Design Storm Rainfalls Depths for Greeley, CO 1 -Hour Storm Frequency Depth (in) 2 -year 1.04 5 -year 1.49 10 -year 1.76 25 -year - 50 -year 2.51 100 -year 2.78 The details of the calculations performed for the pre -development and the proposed conditions are detailed below. A copy of the UDFCD FCD Rational Method Spreadsheet is attached. Pre -Development conditions The site currently consists of cultivated crops with an associated imperviousness of 2%. Weld County's zoning map' designates the zone as Agricultural. The Project lies with the Coalbank Creek -Cache la Poudre River Drainage Basin. Runoff from the site flows northeast over agricultural land and eventually discharges to the Graham Seep, an irrigation ditch located east of the site. The irrigation ditch eventually releases flow to the La Poudre River. The pre - development condition assessment assigns one basin, referred to as Basin 1, for the entire Project property impacted by the proposed design. See the attached Figure 1 — Existing Conditions for further details on the pre -developed conditions. Basin 1 Basin 1 has an area of approximately 4.58 acres and is the only basin identified in the pre - development conditions. The basin incorporates the area that will be disturbed by the Project, the area that contributes run-on to the Project, and the area that receives run-off from the Project area. Basin 1 does not receive any run-on due to its location bound between two highways, which are relative high points, and their adjacent drainage ditches. Runoff from Basin 1 flows northeast over gentle slopes and eventually discharges off -site onto the adjacent agricultural lands (Design Point 1). The gentle slopes likely produce runoff as sheet flow across the majority of the site, draining toward the northeast site boundary. The peak flow rates for the 5-, 10-, and 100 -year storm events are approximately 0.05 cubic feet per second (cfs), 0.08 cfs, and 2.74 cfs, respectively. Proposed Conditions Three sub -basins have been identified for the proposed conditions, Sub -Basin 1.1, 1.2 and 1.3. Sub -Basin 1.1 consists of a majority of the site improvements including the proposed substation pad, access roads, and the permanent stormwater treatment facility and associated water quality measures. The runoff from the substation and access roads will be directed north to the detention facility and released off -site in a controlled manner to the northeast (Design Point 2). Runoff from the remainder of the site, Sub -Basins 1.2 and 1.8, will flow around the substation to 'https://www.co.weld.co.us/maps/zoning/. Weld County Zoning Map. Accessed 6/14/2018. the east and north, respectively, to discharge off -site. See the attached Figure 2 — Proposed Conditions for more information on the proposed conditions. A detailed description of each sub -basin in the proposed design is outlined below: Sub -Basin 1.1 Sub -Basin 1.1 consists of the proposed gravel substation pad and gravel roads, the proposed gravel lined detention facility and the associated water quality measures, such as a concrete forebay, concrete trickle channel, and outlet control devices. The sub -basin has an area of roughly 2.87 acres and is 40% impervious. Runoff generated on the gravel surfaces will flow north over an approximate 2% slope toward the concrete forebay and ultimately flow to the pond. The peak flow rates for the 5-, 10-, and 100 -year storm events are approximately 1.66 cfs, 2.19 cfs, and 6.49 cfs, respectively, but the flow is detained by the pond and released in a controlled manner (Design Point 2). The release rates from the pond according the UDFCD UD- Detention Spreadsheet are negligible for the 5- and 10 -year events, and 0.1 cfs for 100 -year event. Sub -Basin 1.2 Sub -Basin 1.2 consists of the portion of the site south of the substation pad and has an area of roughly 1.31 acres. This sub -basin will not be altered by the construction of the pad. The pad elevation will be raised above the surrounding grade, preventing any run-on from entering the pad. Runoff from this basin will flow east over gentle slopes to discharge off -site at Design Point 1. The peak flow rates for the 5-, 10-, and 100 -year storm events are approximately 0.05 cfs, 0.08 cfs, and 0.77 cfs, respectively. Sub -Basin 1.3 Sub -Basin 1.3 consists of the portion of the property west and northwest of the substation pad and has an area of 0.40 acres. Similar to Sub -Basin 1.2, this sub -basin will not be impacted by the construction of the substation pad. To deter run-on from entering the site, a grassed swale is recommended west of the substation pad, between the road and the pad. The swale would convey the flow generated within the sub -basin from the south access road to the north to eventually join the runoff from the detention pond. The flow would then discharge off -site at Design Point 1. The peak flow rates for the 5-, 10-, and 100 -year storm events are 0 cfs, 0.01 cfs, and 0.24 cfs, respectively. A summary of each sub -basin's pre -developed and proposed characteristics and the peak discharge rates is attached in the UDFCD Rational Spreadsheet. Extended Detention Basin The extended detention sizing method was used to estimate the required detention volume for the WQCV, EURV, and 100 -year storm events. The site will require approximately 0.3 acre-feet of storage. A pond with a top surface area of approximately 6,500 square feet and 3 feet of storage above the micropool was modeled to determine preliminary compliance with the requirements. The storage volumes recommended to match the required volume in the designed ponds are shown in Table 2. A summary of the peak discharge rates associated with the Design Points in the pre -developed and proposed conditions is shown in Table 3. A copy of the UDFCD UD-Detention Spreadsheet is attached. Table 2: Required Detention Pond Storage Volumes Design Event Volume Required (ac -ft) Release Rate (cfs) WQCV 0.052 negligible EURV 0.121 negligible 100-yr 0.305 0.1 Table 3: Design Point Peak Discharge Summary Design Point Location Pre -Development Release Rate (cfs) Proposed Release Rate (cfs) Remarks Clio Q,00 Clio Q,00 1 Outlet Developed Outlet (Proposed of Basin of Sub Conditions) Conditions} 1 -Basin (Pre - 1.2 0.1 2.74 0.02 0.77 2 1.1 Outlet Conditions) and of 1.3 Sub -Basins (Proposed N/A N/A 0.01 0.1 Flows detained in EDB Conclusions and Recommendations The Graham Creek Substation introduces roughly 2.5 acres of new impervious surface to an existing agricultural field and therefore must incorporate permanent stormwater management features. All drainage design has been completed in accordance with the criteria set forth in the Weld County Drainage Criteria and the UDFCD. The Project must be designed to release stormwater for the WQCV, the EURV, and the 100 -year events in a controlled manner. Moreover, the site must be designed to release the 100 -year storm event at rate equivalent to the pre -development 10 -year event (approximately 0.1 cfs). An EDB is recommended to achieve compliance with the detention and peak discharge requirements. The EDB would require approximately 0.3 acre-feet of storage at a 3 -foot depth. An orifice plate with 3 orifices, sized and set at specified elevations, is required to release the WQCV, the EURV, and the 5 -year event at the appropriate release rates and within the specified timeframes. An overflow grate would control and detain the 10 -year event, and a 12" pipe with a 0.4" restrictor plate would release the volumes associated with larger storm events. An emergency spillway with at least 1 -foot of freeboard must also be included to control the 500 -year event. The spillway should be reinforced with buried riprap per the standards in the Manual to prevent scouring and potential erosion issues downstream. The attached UDFCD UD-Detention Spreadsheet includes the elevations and specifications of the required outlet devices. Calculation of Peak Runoff using Rational Method Designer Company: Date: 6/15/2018 Allison Bell H DR, Inc Project: Location:. Graham Creek Substation Weld County! CO 0.395 (1.1 — C5)� 51133 Lt Lt tt - 60c:st fi M ft Computed tt = ti + tt Version 2.00 released May 2017 Cells of this color are for required user -input Cells of this color are for optional override values Cells of this color are for calculated results based on overrides tlnintmum= 5 (urban) trninimum= 10 (non -urban) Regional t, _ (2 6 —17i) + Lt 60 (141 + 9)A 1 -hour rainfall depth, P1 (in) = Rainfall Intensity Equation Coefficients 2-yr 5-yr 10-yr Selected t, = lmax{trninirnum,min(Coinputecltc, Regional tt)) 25-yr 50-yr 100-yr 500-yr 0.85 1.13 1.41 1.88 2.31 2.80 4.18 a b c 28.50 10.00 0.786 a*P1 [(in/h•) - (b + tef Q(cfs) = CIA Subcatchment Name Area (ac) NRCS Hydrologic Soil Group Runoff Coefficient, C Percent Imperviousness 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr 1 -EXISTING 4.58 - A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 1.1 - PAD/ROAD 2.87 A 40.0 0.25 0.27 0.28 0.32 0.37 0.42 0.51 1.2 - S OFF -PAD 1.31 A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 1.3 - N OFF -PAD 0.40 A 2.0 0.01 0.01 0.01 0.01 0.04 0.13 0.27 Overland (Initial) Flow Time Channelized (Travel) Flow Time Time of Concentration Subcatchment Name Overland Flow Length Li (ft) UfS Elevation (ft) (Optional) DfS Elevation (ft) (Optional) Overland Flow Slope Si (ftfft) Overland Flow Time ti (min) Channelized Flow Length Lt (ft) UfS Elevation (ft) (Optional) DfS Elevation (ft) (Optional) Channelized Flow Slope St (ftfft) NRCS Conveyance Factor K Channelized Flow Velocity Nit (ftfsec) Channelized- Flow Time tt (min) Computed tG (min) Regional tc (min) Selected tc (min) 1- EXISTING 500.00 4887.00 4873.50 0.027 31.83 42.00 4873.50 4872.00 0.036 7 1.32 0.53 32.36 26.06 26.06 1.1- PAD/ROAD 300.00 4886.00 4878.50 0.025 19.24 213.00 4878.50 4876.50 0.009 20 1.94 1.83 21.07 21.71 21.07 1.2 - S OFF -PAD 500.00 4887.00 4878.00 0.018 36.38 136.00 4878.00 4874.00 0.029 7 1.20 1.89 38.27 27.08 27.08 1.3 - N OFF -PAD 500.00 4886.00 4874.00 0.018 36.38 72.00 4874.00 4871.00 0.029 7 1.20 1.00 37.38 26.41 26.41 Subcatchment Name Rainfall Intensity, I (infhr) Peak Flow, Q (cfs) 2-yr 5-yr 10-yr 25-yr 50-yr I 100-yr 500-yr 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr 1 EXISTING 1.45 1.92 2.40 3.20 3,93 4,77 7.12 0.03 _ 0.05 0.08 0.16 0.76 2.74 8.70 1.1- PAD/ROAD 1.63 a 2.16 2.70 3.60 4.42 5.36 8.00 1.19 1.66 2.19 3.26 4.65 6.49 11.76 1.2 S OFF 1.42 1.88 2.35 3.13 3.85 4.66 6.96 0.01 0.01 0.02 0.04 0.21 0.77 2.44 - -PAD 1.3 N OFF 1.44 a 1.91 2.38 3.18 s 3.90 4.73 7.06 0.00 0.00 0.01 0.01 0.07 0.24 0.75 - -PAD DETENTION BASIN STAGE -STORAGE TABLE BUILDER UD-Detention, Version 3.07 (February 2017) Project: Graham Creek Substation Basin ID: 1.1 - Substation Pad, Access Roads, EDB Facility 1 CSO-YR vnidIMF _Ulan 1 PERMANENT — POOL f :ZONE 3 :ZONE ;` 2 ZONE 1 AND 2 - ORIFICES `--100-YEAR ORIFICE Example Zone Configuration (Retention Pond) Required Volume Calculation Selected BMP Type = Watershed Area = Watershed Length = Watershed Slope = Watershed Imperviousness = Percentage Hydrologic Soil Group A = Percentage Hydrologic Soil Group B Percentage Hydrologic Soil Groups CID = Desired WQCV Drain Time =- Location for 1 -hr Rainfall Depths = Water Quality Capture Volume (WQCV) = Excess Urban Ruioff Volune (EURV) = 2-yr Ru-loff Volune (P1 = 0.85 in.) -= 5-yr Ruioff Volune (P1 = 1.13 in.) = 10-yr Ruioff Volune (P1 = 1:41 in.) _ 25-yr Ruioff Volune (P1 = 1.88 in.) _ 50-yr Rwoff Volune (P1 = 2.31 in.) = 100-yr Rinoff Volune (P1 = 2.8 in.) _ 500-yr Ruioff Volune (P1 = 4.18 in.) _ Approximate 2-yr Detention Volirne = Approximate 5-yr Detention Volute = Approximate 10-yr Detention Volume = Approximate 25-yr Detention Volume = Approximate 50-yr Detention Volune =- Approximate 100-yr Detention Volume = Stage -Storage Calculation Zone 1 Volume (WQCV) =- Zone 2 Volune (EURV - Zone 1) = Zone 3 (100yr + 1 /2WQCV -Zones1 &2)_ Total Detention Basin Volume = Initial Sucharge Volume (ISV) = Initial Sirdarge Depth (ISD) =- Total Available Detention Depth (H:O-a1) = Depth of Trickle Channel (HTC) _ Slope of Trickle Charnel (STc) = Slopes of Main Basin Sides (Smain) = Basin Length -to -Width Ratio (Rijw) _ Irtitial Sircharge Area (Also) = Sucharge Volume Length (Lis,) = Sucharge Volu-ne Width (Wis„) = Depth of Basin Floor (HItQOR) = Length of Basin Floor (LaGOR) = Width of Basin Floor (WRooR) = Area of Basin Floor (ARooR) = Volume of Basin Floor (VROOR) = Depth of Main Basin (Hh,1,\lrti) = Length of Main Basin (LM,,\1e) _ Width of Main Basin (WM,11f,) = Area of Main Basin (Ah;�,51N) = Volune of Main Basin (VM Jr...) = Calculated Total Basin Volune (VI) _ EDB 3.00 550 0.009 50.00% 100.0% 0.0% 0.0% 40.0 acres ft ft/ft percent percent percent percent hours Denver - Capitol Building 0.052 0.173 0.084 0.117 0.154 0.224 0.305 0.407 0.702 0.079 0.110 0.144 0.205 0.250 0.305 0.052 0.121 0.158 0.331 7 0.40 5.00 1.00 0.010 4 2.5 17 4.1 4.1 0.82 89.1 36.8 3,277 961 2.78 111.3 59.1 6,575 13,445 0.331 acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet acre-feet fth3 ft ft ft ft/ft H'V fth2 ft ft ft ft ft fth2 fth3 ft ft ft fth2 fth3 acre-feet Optional User Override 1 -fir Predpitation 0.85 1.13 141 1 88 2.31 2.80 418 inches i nehes inches inches inches inches inches Depth Increment = 0.25 ft Stage - Storage Description Stage (ft) Optional Override Stage (ft) Length (ft) Width (ft) Area (fth2) Optional Override Area (fth2) Area (acre) Volune (fth3) Volune (ac -ft) Top of Micropool 0.00 4.1 4 1 17 0 000 tSV 0.40 4.1 41 17 0.000 7 0.000 0.50 4.1 4.1 17 0.000 8 0.000 0.75 4.1 4.1 17 0.000 12 0.000 1.00 4.1 41 17 0.000 17 0.000 1.25 4.1 4.1 17 0.000 21 0.000 1.50 13.5 7.7 104 0.002 29 0.001 1.75 39.5 17.7 699 0.016 118 0.003 2.00 65.5 27.7 1,814 0.042 421 0.010 Floor 2.22 88/ 36 5 3,225 0 074 968 0.022 2.25 89.3 37.1 3,310 0.076 1,099 0.025 2.50 91.3 39.1 3,567 0.082 1,959 0.045 Zone 1 ('Vli'QCV) 2.58 92.0 39.7 3,651 0.084 2,248 0.052 2.75 93.3 41.1 3,832 0 088 2,884 0.066 3.00 95.3 43.1 4,105 0.094 3,876 0.089 3.25 97.3 45.1 4,386 0 101 4,937 0113 3.50 99.3 471 4,674 0 107 6,069 0.139 3.75 101.3 49.1 4,971 0.114 7,275 0.167 Zone 2 (EURV) 3.81 101.8 49.5 5,044 0.116 7,575 0.174 4.00 103.3 51.1 5,276 0121 8,555 0.196 4.25 105.3 53.1 5,589 0.128 9,913 0.228 4.50 107.3 55 1 5,910 0 136 11,350 0.261 4.75 109.3 57.1 6,238 0.143 12,869 0.295 Z3 (100+1/2vWQCV) 5.00 111.3 59.1 6,575 0.151 14,470 0.332 5.25 113.3 61.1 6,920 0.159 16,157 0.371 5.50 115.3 63.1 7,273 0167 17,931 0.412 5.75 117.3 65.1 7,634 0.175 19,794 0.454 6.00 119.3 67.1 8,002 0184 21,748 0.499 6.25 121.3 69.1 8,379 0 192 23,796 0.546 6.50 123.3 71.1 8,764 0.201 25,939 0.595 6.75 125.3 73.1 9,157 0.210 28,178 0.647 7.00 127.3 75.1 9,558 0 219 30,518 0.701 7.25 129.3 77.1 9,966 0.229 32,958 0.757 7.50 131.3 79.1 10,383 0.238 35,501 0.815 7.75 133.3 81.1 10,808 0.248 38,150 0.876 8.00 135.3 83.1 11,241 0.258 40,906 0.939 8.25 137.3 85.1 11,681 0.268 43,771 1.005 8.50 139.3 87.1 12,130 0.278 46,747 1.073 8.75 141.3 89.1 12,587 0.289 49,837 1.144 9.00 143.3 91.1 13,052 0.300 53,042 1.218 9.25 145.3 93.1 13,525 0.310 56,363 1.294 9.50 147.3 95.1 14,005 0.322 59,805 1.373 9.75 149.3 97.1 14,494 0.333 63,367 1.455 10.00 151.3 99.1 14,991 0.344 67,052 1.539 10.25 153.3 101.1 15,496 0.356 70,863 1.627 10.50 155.3 103 1 16,009 0 368 74,801 1.717 10.75 157.3 105.1 16,529 0.379 78,868 1.811 11.00 159.3 107.1 17,058 0.392 83,066 1.907 11.25 161.3 109 1 17,595 0 404 87,398 2.006 11.50 163.3 111 1 18,140 0 416 91,865 2.109 11.75 165.3 113.1 18,693 0.429 96,468 2.215 12.00 167.3 115.1 19,253 0.442 101,211 2.323 12.25 169.3 117.1 19,822 0.455 106,096 2.436 12.50 171.3 1191 20,399 0.468 111,123 2.551 12.75 173.3 121.1 20,984 0.482 116,296 2.670 Graham Creek Detention.xlsm, Basin 6/15/2018, 2:12 PM Detention Basin Outlet Structure Design UD-Detention, Version 3,07 (February 2017) Project: Graham Creek Substation Basin ID: 1.1 100-YR VOLUME EURV woe‘Lr_ WtHMANEN I- POOL ZONE 3 LONE 2 zONC 1 AIL 1 ANU 2' ORIFICES 100 -YEAR ORIFICE Example Zone Configuration (Retention Pond) 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) Zone 2 (EURV) (190+1/2WQCV) Stage (ft) Zone Volume (ac -ft) Outlet Type 2.58 0.052 Orifice Plate 3.81 0.121 Orifice Plate 5.00 0.158 \'Veir&Pipe (Restrict) ft (distance below the filtration media surface) inches 0.331 Total Calculated Parameters for Underdrain Underdrain Orifice Area = Underdrain Orifice Centroid = N/A N/A ft2 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 BM P) ft (relative to basin bottom at Stage = 0 ft) ft (relative to basin bottom at Stage = 0 ft) inches inches 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 2.75 N/A N/A User Input: Stage and Total Area of Each Orifice Row (numbered from lowest to highest) Stage of Orifice Centred (ft) Orifice Area (sq. inches) Stage of Orifice Centroid (ft) Orifice Area (sq. inches) Calculated Parameters for Plate WQOrifice Area per Row a Elliptical Half -Width = Elliptical Slot Centroid = Elliptical Slot Area = N/A N/A N/A N/A ft2 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 8 (optional) 000 1.00 200 012 0.12 050 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 N/A N/A N/A N/A N/A N/A ft (relative to basin bottom at Stage= oft) ft (relative to basin bottom at Stage= 0 ft) inches Calculated Parameters for Vertical Orifice Vertical Orifice Area = Vertical Orifice Cent ro id = Not Selected Not Selected N/A N/A N/A N/A ft2 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 3 Weir Not Selected 4.00 N/A 5.00 N/A 4.00 N/A 0,00 N/A 70% N/A 50% N/A ft (relative to basin bottom at Stage =0 ft) 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 3 Restrictor Not Selected 3.20 N/A 12.00 N/A 0.40 User Input Emergency Spillway (Rectangular or Trapezoidal) Spillway Invert Stage= Spillway Crest Length = Spillway End Slopes = Freeboard above Max Water Surface = 5.70 5.00 4.00 1.50 Calculated Parameters for Overflow Weir Height of Grate Upper Edge, H: = 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 = ft (distance below basin bottom at Stage =0 ft) inches inches ft (relative to basin bottom at Stage = 0 ft) feet H:V feet Zone 3 Weir Not Selected 4.00 N/A D.€ 0 N/A 0.00 N/A 0.00 N/A 0.00 N/A feet feet should be >4 ft` ft2 Calculated Parameters for Outlet Pipe w/ Flow Restriction Plate Outlet Orifice Area = Outlet Orifice Centroid = Half -Central Angle of Restrictor Plate on Pipe = Zone 3 Restrictor Not Selected 0.01 N/A 0.02 N/A 0.37 WA Calculated Parameters for Spillway Spillway Design Flow Depth= 0.44 feet Stage at Top of Freeboard = 7.64 feet Basin Area at Top of Freeboard = 0.24 acres ft2 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 Hydrograph Volume (acre -ft) = Predevelopment Unit Peak Flow, q (cfsfacre) = Predevelopment Peak Q (cfs) = Peak Inflow Q (cfs) = Peak Outflow Q (els) = Ratio Peak 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) a Time to Drain 99% of Inflow Volume (hours) = Maximum Pending Depth (ft) a Area at Maximum Pending Depth (acres) a Maximum Volume Stored (acre -ft) _ WQCV EURV 2 Year 5 Year 10 Year 25 Year 50Year 100 Year 500 Year 0.53 1.07 0.85 1.13 1.41 1.88 2.31 2.80 4.18 0.052 0.173 0.084 0.117 0.154 0.224 0.305 0.407 0.702 0.051 0.173 0.083 0.117 0.154 0.223 0.304 0.407 0.701 0.00 0.00 0.00 0.00 0.01 0.02 0.16 0.43 1.19 0.0 0.0 0.0 0.0 0.0 0.1 0.5 1.3 3.6 0,7 2.5 1.2 1.7 2,2 3.2 4.3 5.7 9,8 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 3.8 N/A N/A N/A 3.4 1.5 1 8 0.2 0.1 1.1 Plate Plate Plate Plate Plate Outlet Plate 1 Outlet Plate 1 Outlet Plate 1 Spillway N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 38 81 52 63 75 90 96 104 104 40 85 54 67 79 96 104 114 117 2.53 3.74 2.88 3.22 3.57 4.11 4.69 5.35 6.05 0.08 0.11 '.09 0.10 0.11 0.12 0.14 0.16 0.19 0.047 0.165 ii.078 0.110 0.147 0.210 0.285 0.385 0.507 I 1 . r r ,, 1 I 11,ll' t I. 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