HomeMy WebLinkAbout20190844.tiffUSE BY SPECIAL REVIEW (USR) APPLICATION
DEPARTMENT OF PLANNING SERVICES " 1555 N. 17TH AVENUE " GREELEY, CO 80631
www.weldgov.com * 970-400-6100 * FAX 970-304-6498
FOR PLANNING DEPARTMENT USE:
AMOUNT $
APPLICATION RECEIVED BY
DATE RECEIVED:
CASE # ASSIGNED:
PLANNER ASSIGNED:
Parcel Number': 1
3 0 3 _ 2 0 0 0 0 0 0 4
Address of site: Vacant
Legal Description: NE4
('A 12 digit number on Tax I D
information, obtainable at
www weldgov corn)
Section: 20 Township: 2 N Range: 63 W
Zone District: Ag Acreage: 20 Floodplain• eological Hazard: YON® Airport Overlay: ycNe
FEE OWNER(S) OF THE PROPERTY:
Name: Mark and Lee Kauffman Partnership
Company:
Phone #:
Street Address:
Email:
8616 WCR 63
City/State/Zip Code: Keenesburg, CO 80643-9129
Name: Applicant. Nick Holland
Company: Cureton Midstream
Phone #:
720-390-4506
Street Address: 518 17th Street, Suite 650
Email. Nick Holland@curetonmidstream.com
City/State/Zip Code:
Name:
Denver, CO 80202
Company:
Phone #:
Street Address:
City/State/Zip Code:
Email:
APPLICANT OR AUTHORIZED AGENT: (See below Authorization must accompany all applications signed by Authorized Agents)
Name: Anne Best Johnson
Company: Tetra Tech
Phone #: 720-204-0173 Email: Anne Johnson@Tetratech corn
Street Address: 1560 Broadway, Suite 1400
City/State/Zip Code:
PROPOSED USE:
Denver, CO 80202
Natural gas compressor station - Oil/Gas Service and Support Facility
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 an4uthorized Agent signs, a letter of authorization from all fee owners must be included with the
application. If a corporation The fee owner. notarized evidence must be included indicating that the signatory has to legal
authority-tb 4ipn fpf the co/Oration.
0
Signature: Owner or Authorized Agent Date , Signature: Owner or Authorized Agent Date
Print Name
Print Name Rev 4/2016
CUREfON
MIDSTREAM
518 171" STREET SUITE 650
DENVER, CO 80202
PHONE. 303 324 5967
October 22, 2018
We, Cureton Midstream, LLC, give permission to Anne Best Johnson from Tetra Tech to apply for any
Land Use Planning Permits or services for the property located in the NE4 of Section 20, Township 2
North, Range 63 West of the 6th P.M., Weld County, Colorado. The property is also known as Weld
County Parcel 1303-20-0-00-004. Email correspondence should be sent to both Authorized Agent and
client.
Authorized Agent contact information:
Client contact information:
Executed by:
Anne Best Johnson
Tetra Tech
1560 Broadway, Suite 1400
Denver, CO 80202
(720) 204-0173 — cell
(720) 931-9373 — office
AnneJohnson@tetratech.com
Nicholas Holland
Cureton Midstream
518 17th Street, Suite 650
Denver, CO 80202
(720) 390-4506 — office
(303) 324-5967 — cell
Nick.Holland@curetonmidstream.com
Name (Print) _Nicholas Holland Date 10/22/2018
1
Address:
DEPARTMENT OF PLANNING AND BUILDING
DEPARTMENT OF PUBLIC HEALTH AND ENVIRONNMENT
1555 NORTH 17TH AVENUE
GREELEY, CO 80631
AUTHORIZATION FORM
I, (111Je), Motif 4 uI f �t a n, give permission to Cc" Ae to n Mid -5 Ike liP)
(Owner — please print) (Authorized Agent — please print)
to apply for any Planning, Building or Septic permits on our behalf, for the property located at (address or
parcel number) below -
/303 Z 000000 9 aosz ep0000 f
NE/y Or -
Legal Description: /i/kr of Section a 0 , Township N, Range 63 W
Subdivision Name: Lot Block
Property Owners Information:
Address: /eat/HMG ei Pas,Tnc SA? amt) hafill Inge) i/,tQI. ZTc/', P..%e4.t4
72
Phone: 0 °') !6 / 3760 E-mail: 4'/A
Authorized Agent Contact Information:
8616 cs 63r er bux c0 80 693
J
Phone: E -Mail:
Correspondence to be sent to: Owner VAuthorizedp Agent Both / by Mail fr/V:rnail
Additional Info:
Owner Signature'
/ fd• 1c( 4 /-sa.-Az.-,
Date: Vg -2.7- Za1
Owner Signature: Date:
CURETON MIDSTREAM MISKEY COMPRESSOR STATION
USR QUESTIONNAIRE
The following statements in bold font are USR questions required by Weld County for the USR Narrative.
Questions that do not pertain to this project are noted as "Not applicable" according to the Weld County
document instructions.
Planning Questions
1. Explain, in detail, the proposed use of the property.
This facility will compress raw low pressure natural gas so that it can be transported to a downstream facility
for further processing. Natural gas will enter and exit the facility via steel pipelines. The compressor station
will also have separation and filtration equipment that will remove water, condensate, and other impurities
from the natural gas stream. Condensate liquids will be pumped off site through a pressurized pipeline for
further processing and sale. Any collected water will be trucked offsite and disposed of in accordance with
federal, state and local regulations.
The proposed facility includes equipment listed in the Building section under question 1. As a high-level
summary, the equipment will include combustors, launchers, receivers, pumps, tanks, catchers and
separators, a temporary construction trailer and conex storage units. The proposed facility will be
developed in one phase. A space for a laydown yard has also been planned on the site in case such a space
is needed.
2. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 22 of the
Comprehensive Plan.
The proposed facility has been engineered, designed and sited to be consistent with the intent of the
Comprehensive Plan in many ways. In addition, site selection was carefully considered. To follow are
policies or goals from the Comprehensive Plan in italic font followed by a description illustrating how this
proposed facility conforms.
A. Policy 7.2: Conversion of agricultural land to nonurban residential, commercial, and industrial uses
should be accommodated when the subject site is in an area that can support such development and should
attempt to be compatible with the region.
The land that will be used for the compressor site has been designated for industrial use by the Town of
Keenesburg. This facility is adjacent and south of a large soil storage facility and within one mile of other
oil/gas and industrial development in the Town of Keenesburg. The proposed facility is compatible with
development in the area currently as well as in the future.
A.Policy 9.5: Applications for a change of land use in the agricultural areas should be reviewed in
accordance with all potential impacts to surrounding properties and referral agencies Encourage
applicant to communicate with those affected by the proposed land use change through the referral process.
On Thursday, October 18, an Open House was held at the West Central Middle School in Keensburg located
at 4977 County Road 29. The meeting invitation was mailed on Friday October 5, 2018 to all property
owners within 1,000 Feet from the 160 -acre parcel. No individuals attended the meeting. Participants were
shown the planned site design and layout and given facts about the proposed compressor station facility
and why it is being proposed.
Lastly, before submitting the USR application to Weld County, the applicant met with the Southeast Weld
Fire District, the Town of Keenesburg and the Weld County Office of Emergency Management.
OG.Goal 1: Promote the reasonable and orderly exploration and development of oil and gas mineral
resources;
AND
OG.Goal 2: Ensure that the extraction of oil and gas resources conserves the land and minimizes the impact
on surrounding land and the existing surrounding land use.
The facility is located in an area included in Keenesburg's long-range planning area and designated for
Industrial development. Surrounding property uses include similar uses.
3. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 23
(Zoning) and the zone district in which it is located.
The property is in the Agricultural Zone District. According to section 23-3-40.A.2 of the Weld County
Code, oil and gas support and service facilities, as proposed on this application, is a use contemplated
through the Use by Special Review process in the Agricultural Zoning District.
4. Describe what type of land uses surround the site. Explain how the proposed use is consistent and
compatible with surrounding land uses.
The Proposed Compressor Station will be located in the northern portion of the 160 -acre parcel. The parcel
is currently zoned A (Agricultural). The nearest existing residential structures on surrounding properties
are nearly 3/4 mile away from the proposed compressor station. The existing land use of surrounding
properties are described below.
• North: The parcel to the north contains an oil storage facility and railroad line.
• South: The parcel south of and adjacent to the overall parcel is in agricultural production.
• East: The parcel to the east is owned by Prospect Valley Dairy and contains agricultural
improvements.
• West: There is one 160 -acre parcel to the west that contains a residence.
As with any change in land use, there are potential impacts to surrounding property owners. The applicant
understands that being a good neighbor is a best practice. In siting this facility, noise, air quality and
lighting were considered. The following paragraphs describe how the applicant has considered these
potential changes and mitigated even perceived impacts.
Light: The impact from light onto adjacent properties will be minimized. The lights that will be on site,
will be manually turned on by an operator when needed. No security lighting is proposed, however,
shielding for the manual outdoor lights is proposed to help mitigate any light pollution that may occur
during those times an operator needs to access the facility at night. The International Dark Sky Standards
were utilized in developing the lighting plan for this application.
Air Quality: The following measures will be deployed to safeguard air quality on site as well as in the area:
• To mitigate dust during plant construction, an industry recognized chemical and/or water may be
applied to internal roads and the access road from Weld County Road 398 as needed.
• There are no significant odors associated with a natural gas compressor facility.
• Emissions are regulated and enforced by the Colorado Department of Public Health and
Environment and the EPA. Both entities are responsible for regulating air quality and greenhouse
gas emissions, and for protecting the public from hazardous air pollutants. The applicant will be
required to obtain an air permit from the State of Colorado that illustrates compliance on all
requirements.
• The applicant will be required to demonstrate ongoing compliance to the State of Colorado.
Noise: Noise impacts from the facility will be reduced by enclosing equipment within buildings and
providing acoustical insulation. Noise generated by this facility will not exceed the residential noise
standards listed in the County Code. A noise modeling report is included in application materials.
5. What are the hours and days of operation? (e.g. Monday thru Friday 8:00 a.m. to 5:00 p.m.)
The Compressor facility and laydown yard will operate 24 hours a day, 7 days a week, 365 days a year;
however, the facility is unmanned. Unless there is an operational requirement, employees will generally
visit the site between the hours of 7:00 a.m. and 5:00 p.m.
6. List the number of full time and/or part time employees proposed to work at this site.
The facility will be unmanned. One employee will visit the site one to two times per day as needed.
7. If shift work is proposed include the number of employees per shift.
Shift work is not proposed for this project
8. List the number of people who will use this site. Include contractors, truck drivers, customers,
volunteers, etc.
During construction there will be between 25-30 personnel (contractors/day) for 4-6 months until
construction is complete. Once the site is operational it is estimated that there will be between 2-5 people
per day accessing the site. This includes large trucks and operators visiting site as needed for maintenance.
9. If this is a dairy, livestock confinement operation, kennel, etc., list the number and type of animals.
Not applicable as this proposed site is not a dairy
10. Describe the type of lot surface and the square footage of each type (e.g. asphalt, gravel,
landscaping, dirt, grass, buildings).
The proposed compressor facility is roughly a 20 -acre footprint. Gravel will cover the pad and the proposed
laydown yard area. The compression units will be enclosed in buildings. The facility will also include a
Conex container or small building to store spare parts and material storage and a small motor control center
building.
11. How many parking spaces are proposed? How many handicapped (ADA) parking spaces are
proposed?
This is not a manned facility, so no designated parking spaces are proposed. As employees visit the site,
they will park near the equipment that they are at the site to service.
12. Explain the existing and proposed landscaping for the site.
The siting of the facility nearly 3/4 mile from WCR 398 and the distance from residential uses does not
necessitate landscaping. There were no attendees at the Neighborhood Meeting. The location adjacent to
other industrial uses and the distance from the nearest residential structure do not necessitate landscaping.
13. Describe the type of fence proposed for the site (e.g. 6 -foot chain link with earth tone slats).
A 6 -foot chain link security fence will surround the compressor site. A cattle guard and swing gate will be
installed on the site entrance road proposed off CR 398.
14. Describe the proposed screening for all parking and outdoor storage areas. If the site is located
in a floodplain outdoor storage is restricted.
A laydown yard is proposed on the southern portion of the lot.
15. Explain any proposed reclamation procedures when termination of the Use by Special Review
activity occurs.
When the Miskey Compressor Station is no longer needed, the equipment will be removed from the
property and the site will be reclaimed with native grassland vegetation. The decommissioning plan for the
facility is as follows: In the event operations cease at this site and the facility is abandoned or removed
from service or operation, the operator, their affiliates or successors will remove the equipment and all its
components. Where possible, materials will be reused or recycled. Where required, waste materials for
disposal will be removed by a licensed contractor and transported to a disposal site. The operator will
comply with all COGCC regulations concerning site restoration. The operator will grade and revegetate
the site to pre -development conditions, or in accordance with the lease termination provisions, or in
accordance with the landowner's request. Best Management Practices for erosion control, revegetation,
and stormwater management will be followed as outlined in the Stormwater Management Plan.
16. Who will provide fire protection to the site?
This site is in the Southeast West Fire Protection District. The applicant has met with Chief Beach on
several occasions prior to submitting the application. Cureton Midstream intends to have a positive and
long-lasting business relationship with the Southeast Weld Fire Protection District.
17. List all proposed on -site and off -site improvements associated with the use (e.g. landscaping,
fencing, buildings, drainage, turn lanes, etc.) and a timeline of when you will have each one of the
improvements completed.
Following approval of the USR, the facility will be constructed within 5-6 months and will include the
access road into the site; the equipment at the facility; the security fence around the facility, and all the
required drainage improvements (channels, culverts and detention pond).
Engineering Questions
1. Describe how many roundtrips/days are expected for each vehicle type: Passenger Cars/Pickups,
Tandem Trucks, Semi-Truck/Trailer/RV (Roundtrip =1 trip in and 1 trip out of site).
During the construction phase of this project, up to four semi -trucks may come to the site on a given day
along with between 25-30 passenger vehicles/work trucks. When the site is operational, up to two Semi -
trucks may come to the site on a given day along with up two to five passenger vehicles/work trucks.
2. Describe the expected travel routes for site traffic.
Main Travel Route: From Interstate 76 to WCR 398 from the east or west.
3. Describe the travel distribution along the routes (e.g. 50% of traffic will come from the north, 20%
from the south, 30% from the east, etc.)
It is anticipated that all traffic will come from the west on WCR 398.
4. Describe the time of day that you expect the highest traffic volumes from above.
It is anticipated that the highest traffic volumes to and from the site will be in the morning hours (7:00 a.m.
to 10:00 a.m.).
5. Describe where the access to the site is planned.
The site access is proposed to be off WCR 398 along an existing private access road. The access is included
in the attached lease.
6. Drainage Design: Detention pond summarized in a drainage report is required unless the project
falls under an exception to stormwater detention requirements per code section 23-12-30 F.1.
A. Does your site qualify for an exception to stormwater detention?
A meeting was held with Weld County Public Works on October 4 to discuss the proposed exception.
Please refer to the attached Grading Plan and Drainage Report.
B. Does your site require a stormwater detention pond?
A stormwater detention pond is required per section 23-12-30 of the Weld County Code. A drainage
report has been included in the application materials and has been prepared by a Colorado Licensed
Professional Engineer. The report adheres to the drainage related sections of the Weld County Code.
It will be stamped and signed following approval of the report by Weld County.
Environmental Health Questions
1. What is the drinking water source on the property?
This Compressor station is an unmanned site and no permanent water supply is proposed. All workers
constructing or accessing the site for maintenance and operational needs will have access to bottled water
services. However, once the construction phase of the project is complete there will be no employees on
site for regular operational duties, for more than 1-3 hours at a time.
2. What type of sewage disposal system is on the property?
The site is an unmanned facility and will not have a permanent septic system or sewer tap on site. The site
is proposing portable toilets to be provided on -site for the 1-2 employees who may visit the site each day.
This is consistent with the Department of Public Health and Environment's portable toilet policy.
3. If storage or warehousing is proposed, what type of items will be stored?
The laydown yard will be used to stage oil and gas pipes or equipment until they are ready to be installed
at this or other Cureton Midstream installations.
4. Describe where and how storage and/or stockpile of wastes, chemicals, and/or petroleum will occur
on this site.
There will be a 400-600 bbl tank that will provide temporary storage for water until it needs to be removed.
There will also be 500 gallons of triethylene glycol (TEG), 500 gallons of Methanol, 1,500 gallons of lube
oil and 1,500 gallons of engine coolant stored on location. All storage tanks will have secondary
containment.
5. If there will be fuel storage on site indicate the gallons and the secondary containment. State the
number of tanks and gallons per tank.
6. If there will be washing of vehicles or equipment on site indicate how the wash water will be
contained.
7. If there will be floor drains indicate how the fluids will be contained.
Not applicable
8. Indicate if there will be any air emissions. (e.g. painting, oil storage, etc.)
This is a facility that handles natural gas and there will be some air emissions. The applicant will obtain all
necessary APENs for use of this facility from the CDPHE.
9. Provide a design and operations plan if applicable. (e.g. composting, landfills, etc.)
10. Provide a nuisance management plan if applicable. (e.g. dairies, feedlots, etc.)
Not applicable
11. Additional information may be requested depending on type of land use requested.
If additional information is needed, please advise and it will be provided.
Building Questions
1. List the type, size (square footage), and number of existing and proposed structures. Show and
label all existing and proposed structures on the USR drawing. Label the use of the building and the
square footage.
Please refer to the mapping documents provided with the application package for location of equipment
and equipment list.
2. Explain how the existing structures will be used for this USR?
There are no existing structures on site.
3. List the proposed use(s) of each existing and proposed structure.
See the chart in question l "description of use" column for the proposed buildings. Each building is
represented on the USR map attached to this application.
OFFICE OF THE SECRETARY OF STATE
OF THE STATE OF COLORADO
CERTIFICATE OF FACT OF GOOD STANDING
1, Wayne W. Williams, as the Secretary of State of the State of Colorado, hereby certify that,
according to the records of this office,
Cureton Midstream, LLC
is an entity formed or registered under the law of Delaware . has complied with all
applicable requirements of this office, and is in good standing with this office. This entity has
been assigned entity identification number 20171539436 .
This certificate reflects facts established or disclosed by documents delivered to this office on
paper through 10/04/2018 that have been posted, and by documents delivered to this office
electronically through 10/05/2018 @ 19:34:47 .
I have affixed hereto the Great Seal of the State of Colorado and duly generated, executed, and issued this
official certificate at Denver, Colorado on 10/05/2018 @ 19:34:47 in accordance with applicable law.
This certificate is assigned Confirmation Number 11 157109 .
Secretary of State of the State of Colorado
*********************************************End ofCertiticate***********************************s********
Notice: A certificate issued electronically from the Colorado Secretary of State 's Web site is fully and immediately valid and effective. However.
as an option. the issuance and validity of a certificate obtained electronically may be established by visiting the i'alidate a Certificate page of
the Secretary of State's Web site. http://www.sos.state.co.us/biz/CertiftcateSearchCriteria.do entering the certificate's confirmation number
displayed on the certificate, and following the instructions displayed. Confirming the issuance of a certificate is merely optional and is not
necessary to the valid and effective issuance of a certificate. For more nformation, visit our Web site. http://www.sos.state.co.us/ click
"Businesses. trademarks. trade names" and select "Frequently Asked Questions."
SURFACE LEASE
This SURFACE LEASE dated as of the .2Ftay of Altair , 2018 (the
"Lease"), is by and between the Mark A. and Lee E. Kauffman Partnefship (as to the NE/4),
and, The Kauffman Brothers Limited Partnership (as to the NW/4), whose address is 8616
CR 63, Keenesburg, Colorado 80643 (whether one or more, "Lessor" or "Lessors"), and
Cureton Front Range LLC, a Delaware Limited Liability Company ("Lessee").
RECITALS
A. Lessor owns land located in the NE/4 and the NW/4 of Section 20, T -2-N, R -63-
W, 6th P.M., in Weld County, Colorado.
B. Lessor desires to lease to Lessee, and Lessee desires to lease from Lessor, a
portion of the Property as depicted and more particularly described on Exhibit "A" attached
hereto on the terms and conditions set forth herein.
AGREEMENT
Section 1. Lease of Property. In consideration of the rents and covenants to be paid
and performed by Lessee and upon the terms and conditions of this Lease, Lessor hereby leases
to Lessee and Lessee hereby leases from Lessor, the Property for operations and activities
relating to oil and gas development and processing ("Facility") (See Exhibit A).
Section 2. Term. The term ("Term") of this Lease shall commence on the date first
set forth above, (the "Commencement Date") and shall continue in full force and effect for five
(5) years, unless terminated earlier under Section 24
Section 3. Rent. Lessee covenants and agrees to pay Lessor to lease the Property, in
lawful money of the United States, without offset, deduction or demand fixed rent (the 'Base
Rent") as follows:
(i) In the amount of
after the Commencement Date;
Section 4. Lease Term Renewal. After the Term, if Lessee desires to continue to
Section 5. Use of Property. Lessee's use of the Property shall be limited to the
planning, construction, operation, maintenance, repair and replacement of the Facility and all
related activities, in compliance with applicable laws. Lessee agrees to obtain all required
permits and approvals for the Facility at its sole costs and expenses. Lessor agrees to grant utility
Pagel of 12
easements to third party electricity providers which may be necessary for operation of the
Facility; and if such easements are located on lands owned by Lessor outside of the Property,
such easements shall be granted at additional compensation to Lessor and in locations approved
by Lessor. Lessor will grant Lessee adequate access to the facility as needed to construct and
operate the facility.
Section 6. Real and Personal Property Taxes/Utilities.
(a) Lessee agrees to be liable for paying all taxes associated with the Property
throughout the Term of this Lease.
(b) Lessee shall pay directly to the provider of such utilities the cost of all electrical,
gas, water, sewer, telephone and other utilities serving the Facility.
Section 7. Construction of Improvements; Title to Improvements.
(a) Construction. Subject to the provisions of this Lease, Lessee may (i) construct on
the Property buildings, structures, roads and other improvements ("Improvements") reasonably
necessary for the Facility; (ii) make such additions, alterations, changes, and improvements in
and to any Improvements now or hereafter on the Property as Lessee may deem necessary or
desirable for operation of the Facility; and (iii) remove, and demolish any Improvements now or
hereafter constructed and erected on the Property by Lessee. Lessee may construct or relocate
existing roads and driveways on the Property only with the prior written approval of Lessor, not
to be unreasonably withheld. Lessee may construct fencing around the perimeter of the Property
as Lessee may deem necessary or appropriate to secure or enclose the same and take other
security precautions if it is determined by Lessee, in its sole discretion, that such fencing and/or
security measures will reduce such risks of damage, death or injury without unduly burdening
Lessor's use of the Property or adjacent property Lessor holds any interest to. The expense for
any and all Improvements authorized herein to be constructed by Lessee, or other security
measures taken by Lessee, shall be borne solely by Lessee.
(b) Work. All work desired to be done by Lessee on the Property shall be done at the
sole cost and expense of Lessee, shall be performed in a good and workmanlike manner, free of
mechanics' and materialmen's liens.
(c) Title to Improvements. All Improvements placed or erected upon the Property by
Lessee, and all personal property situated therein shall, during the term of this Lease and any
extension or renewal hereof, shall vest exclusively in Lessee, and Lessee shall have the right at
Lessee's sole discretion to remove prior to the expiration or termination of the Term any such
Improvements. Upon the termination of this Lease for any reason, whether by expiration of the
Term or otherwise, the title to the portion of any Improvements then situated on the Property and
not yet removed by Lessee, including roads, gravel, road base, buildings, concrete foundations,
ponds and buried pipelines abandoned in place, shall, at Lessor's option within its sole discretion
forthwith vest in and be the sole property of the Lessor, free of any right, title, interest, claim, or
demand of the Lessee, or of anyone claiming through or under Lessee, provided, however, that
Lessee shall have the right, by written notice delivered to Lessor prior to the date of such
termination or expiration, to reserve title in and to any tanks, separators, dehydration units and
Page 2 of 12
other oilfield equipment and appurtenances on the Property, which Improvements Lessee shall
remove in any event prior to termination or expiration of the Lease. If Lessee fails to remove
any such Improvements by the end of the Lease Term, Lessee shall give Lessor written notice at
least 60 days before end of the Lease Term of its intention to leave such Improvements. Title to
such Improvements shall forthwith vest in and be the sole property of the Lessor, free of any
right, title, interest, claim, or demand of the Lessee, or of anyone claiming through or under
Lessee. In the event Lessor chooses not to accept title to any Improvements abandoned on the
Property by Lessee as described above, Lessee shall, prior to the end of the Lease Term or
Renewal Terms upon written notice from Lessor specifying the Improvements to be removed,
remove all such specified Improvements and return the Property as near as reasonably possible to
the condition it was in on the date of this Agreement, including, without limitation, the grading
and successful reseeding of the Property, provided that Lessee shall be not be obligated to
remove footers and foundations in the ground beyond an 18 inch depth, nor shall Lessee be
required to remove buried pipelines Lessee shall have a limited license to access the Property to
accomplish the foregoing, as necessary
(d) Mechanic's Liens. Lessee shall keep the Property and the Improvements, at all
times during the Term and Renewal Term free of mechanics and materialmen's liens and other
liens of like nature arising out of Lessee's actions, and at all times shall fully protect and
indemnify Lessor against all such liens or claims and against all attorneys' fees and other costs
and expenses growing out of or incurred by reason or on account of any such liens or claims.
(e) Further Assurances. Upon the expiration of the Term or Renewal Term, Lessee
shall execute and deliver to Lessor such instruments as Lessor shall reasonably request to
transfer the Improvements to Lessor and to confirm Lessor's ownership thereof.
(f) Condition of Property. Lessee shall accept the condition of the Property on the
Commencement Date. Lessor has no obligations or responsibilities for the maintenance or
upkeep of the Property, except to pay all taxes and assessments owed on the Property, which
accrued prior to the Commencement Date.
Section 8. Environmental Matters.
(a) Compliance with Laws. Lessee shall and shall cause its agents, employees,
contractors and invitees to use the Property and conduct any operations on the Property in
compliance with all applicable Environmental Laws.
(b) Normal Use. No Hazardous Substances shall be generated, treated, stored or
disposed of, or otherwise deposited in or located on the Property other than the normal use of
Hazardous Substances typically used by businesses engaged in the types of activities authorized
by this Lease so long as such use is in full compliance with all applicable Environmental Laws.
(c) Noise Reduction: Lessee shall implement and use the best methods to
soundproof and reduce the noise from the compressors located and operating upon the Property
to the standards of Weld County.
Page 3 of 12
(d) Indemnification. Lessee hereby agrees to indemnify, defend and hold harmless
Lessor and its successors or assigns from and against any and all suits, actions, claims, damages,
fines, penalties or losses to which any of them may be directly arising out of Lessee's failure to
comply with the provisions of this Section 8.
(e) Lessee shall protect, indemnify, and hold harmless Lessor, and any subsequent
owner of the Property from any Environmental Claims relating to the Property thereunder that
arise solely out of Lessee's operations located on the Property; provided, however, Lessee will
not protect, indemnify, and hold harmless Lessor, and any subsequent owner of the Property
from any Environmental Claim arising out of a pre-existing condition which existed on the
Property at the time Lessee executed this Agreement.
(f) "Environmental Claims" shall mean all Claims asserted by governmental bodies
or other third parties for pollution or environmental damage of any kind, arising from operations
on or ownership of the Property or ownership of the oil and gas leasehold interest, whichever is
applicable, and all cleanup and remediation costs, fines and penalties associated therewith,
including, but not limited to, any Claims arising from Environmental Laws. Environmental
Claims shall not include the costs of any remediation undertaken voluntarily by any Party, unless
such remediation is performed under the imminent threat of a Claim by a governmental body or
other third party.
(g) "Claim" shall mean any and all losses, claims, damages, judgments, fines or
liabilities, including reasonable legal fees or other expenses incurred in investigating or
defending against such losses, claims, damages, judgments, fines or liabilities, and any amounts
expended in settlement of any claims.
(h) "Environmental Laws" shall mean any laws, regulations, rules, ordinances, or
order (whether currently existing or hereafter adopted) of any federal, state or local governmental
authority(ies), which relate to or otherwise impose liability, obligation, or standards with respect
to pollution or the protection of the environment, including, but not limited to, the
Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended
(42 U.S.C. § 9601, et seq.), the Resource Conservation and Recovery Act of 1976 (42 U.S.C. §§
6901, et seq.), the Clean Water Act (33 U.S.C. §§ 466, et seq.), the Safe Drinking Water Act (14
U.S.C. § 1401, et seq.), the Hazardous Material Transportation Act (49 U.S.C. §§ 1801, et seq.),
the Clean Air Act (42 U.S.C. § 7401, et seq.), and the Toxic Substances Control Act (15 U.S.C. §
2601, et seq.).
(i) Lessor states that to the best of their knowledge there is no material latent
condition or defect on the Property that would subject Lessee to an Environmental Claim.
(j) Survival. The obligations of Lessee set forth in this Section 8 shall survive the
Term, Renewal Term or earlier termination of this Lease or the exercise by Lessor of any of its
remedies hereunder.
Section 9. Insurance. Lessee shall, during the entire Term and Renewal Term, keep
in full force and effect, solely at Lessee's cost and expense, all of the applicable insurance
coverages set forth below:
Page 4 of 12
2
a
(b) Statutory worker's compensation insurance and employer's liability insurance.
(c) Coverage for all risks of physical loss or damage insuring the full replacement
value of all Improvements and all fixtures and equipment located upon or used in the operation
of such Improvements.
Section 10. Casualty. If the Facility or Improvements, if any, or any portion thereof,
shall be damaged or destroyed by fire, casualty or the elements, this Lease shall continue in full
force and effect, without any abatement of or reduction in the Base Rent payable hereunder.
Section 11. Condemnation. In the event that all or a part of the Property is taken by
eminent domain or conveyed in lieu of eminent domain, if the Property cannot reasonably be
used by Lessee for their intended purpose (a "Total Taking"), then this Lease will terminate
effective as of the date that the condemning authority shall take possession of the same. In the
event of a taking which does not prevent Lessee from using the Property for their intended
purposes (a "Partial Taking"), this Lease shall not terminate but shall continue in full force and
effect without modification to Base Rent or other obligations hereunder. In the event of either a
Total Taking or a Partial Taking, Lessor shall be entitled to retain all portions of any
condemnation award except to the extent expressly allocated to the value of the Improvements or
Lessee's leasehold estate, and Lessee shall be free to seek such separate condemnation award for
Lessee's interest in the Improvements or leasehold estate as Lessee deems to be appropriate.
Section 12. Assignment and Subletting. This Lease shall be assignable, in whole or in
part, by either party. Such assignment shall be expressly subject to all terms and conditions of
this Lease, and the assumption by assignee of all obligations under this Lease.
Section 13. Quiet Enjoyment.
(a) Lessee, upon paying the Base Rent and all other sums and charges to be paid by
it under this Lease, and observing and keeping all covenants, warranties, agreements, and
conditions of this Lease on its part to be kept, shall quietly have and enjoy the Property during
the term, without hindrance or molestation by anyone claiming through or under Lessor, subject
to all liens, encumbrances, easements, restrictions and other matters of title as of the date hereof
(the "Permitted Exceptions").
(b) Lessor represents and warrants to Lessee that it has fee simple title to the
Property, free and clear of all liens, encumbrances, easements, restrictions and any other matters
or defects other than the Permitted Exceptions, and the power and authority to execute and
deliver this Lease and to carry out and perform all covenants to be performed by it hereunder.
Section 14. Defaults.
(a) The following events (each an "Event of Default") shall constitute defaults on
the part of the Lessee with respect to its obligations hereunder:
Page 5 of 12
(1) The failure to pay any amount due hereunder when the same shall become
due, and the continuance of such failure for a period of thirty (30) days after written notice of
such default has been given by Lessor to Lessee.
(2) The failure to observe or perform any of the other material covenant,
agreement, or obligation herein contained on the part of Lessee to be observed and performed,
and the continuance of such failure for a period of thirty (30) days after written notice thereof has
been given by Lessor to Lessee or, if such failure, because of its nature, cannot be cured
completely within thirty (30) days, the failure to commence the correction of such failure within
such thirty (30) days or the failure to diligently prosecute the correction of such failure.
(3) The filing or execution or occurrence of: (i) a petition in bankruptcy by or
against Lessee; (ii) a petition or answer seeking a reorganization, arrangement, composition,
readjustment, liquidation, dissolution or other relief of the same or different kind under any
provision of the Federal Bankruptcy Code or any state bankruptcy or insolvency law; (iii)
adjudication of Lessee as a bankrupt or insolvent; (iv) an assignment by Lessee for the benefit of
creditors whether by trust, mortgage, or otherwise; (v) a petition or other proceeding by or
against Lessee for, or the appointment of, a trustee, receiver, guardian, conservator or liquidator
of Lessee with respect to all or substantially all its property; or (vi) a petition or other proceeding
by or against Lessee for its dissolution or liquidation, or the taking of possession of the property
of Lessee by any governmental authority in connection with dissolution or liquidation.
(4) The complaint or violation issued by the Colorado Oil and Gas
Conservation Commission ("Commission") that has not been corrected to satisfy the
Commission.
(b) Upon the occurrence or existence of an Event of Default, Lessor may at any
time thereafter while such Event of Default continues:
(1) Subject to compliance with Section 14(b)(6), below, give a written
termination notice to Lessee, and upon the date specified in such notice, the Term of this Lease
shall expire and terminate, and all rights of Lessee under this Lease shall cease without the
necessity of reentry or any other act on Lessor's part. No act by or on behalf of Lessor, such as
entry of the Property by Lessor to perform maintenance and repairs and efforts to relet the
Property, other than giving Lessee written notice of termination, shall terminate this Lease.
Upon any termination of this Lease, Lessee shall quit and surrender to Lessor the Property in
accordance with this Lease. If this Lease is terminated, Lessee shall be and remain liable to
Lessor for damages as hereinafter provided and Lessor shall be entitled to recover forthwith from
Lessee as damages an amount equal to the total of: (i) all costs, fees and expenses incurred by
Lessor (including reasonable attorney's fees) in regaining possession of the Property; plus (ii)
any and all amounts payable hereunder by Lessee as of the date on which Lessor regains
possession of the Property; plus (iii) all other amounts necessary to compensate Lessor fully for
all damage caused by Lessee's default, subject to any duty of Lessor under applicable law to
mitigate (which sum is referred to herein as the "Default Rent").
(2) Subject to compliance with Section 14(b) (6), below, with notice, enter
upon and repossess the Property or any part thereof, and repossess the same as of Lessor's
Page 6 of 12
former estate and expel Lessee and those claiming through or under Lessee, and remove the
effects of any and all such persons, by force, summary proceedings, ejectment or otherwise,
without being deemed guilty of any manner of trespass and without prejudice to Lessor's rights
to recover Default Rent and damages. Lessor shall be under no liability for or by reason of any
such entry, repossession or removal. If Lessor elects to reenter as provided herein, or if Lessor
takes possession pursuant to legal proceedings or pursuant to any notice provided for by law,
Lessor may, from time to time, without terminating this Lease, relet the Property or any part
thereof. No such reentry, repossession or reletting of the Property by Lessor shall be construed
as an election on Lessor's part to terminate this lease unless a written notice of termination is
given to Lessee by Lessor. No such reentry, repossession or reletting of the Property shall
relieve Lessee of its liability and obligation under this Lease, all of which shall survive such
reentry, repossession or reletting, provided that Lessor's obligation at law, if any, to mitigate its
losses shall remain. Upon the occurrence of such reentry or repossession, Lessor shall be
entitled to the amount of the monthly Default Rent, and all other sums, which would be payable
hereunder if such reentry or repossession had not occurred, less the net proceeds, if any, of any
reletting of the Property after deducting all of Lessor's expenses in connection with such
reletting. Lessee shall pay such amounts to Lessor on the days on which the Rent would have
been payable hereunder if possession had not been retaken.
(3) At any time or from time to time after the repossession of the Property by
Lessor following an Event of Default by Lessee, regardless of whether the Term of this Lease
has terminated, Lessor shall have the right to relet the Property or any part thereof for the
account of Lessee, in the name of Lessee or Lessor, without notice to Lessee, for such term or
terms (which may be greater or less than the period which would otherwise have constituted the
balance of the Term of this Lease) and on such conditions (which may include concessions or
free rent) and for such uses as Lessor, in its uncontrolled discretion, may determine, with the
right to make alterations and repairs to the Property, and may collect and receive the rents
therefor. In no event shall Lessee be entitled to receive the excess, if any, of net rent collected by
Lessor as a result of such reletting over the sums payable by Lessee to Lessor hereunder.
(4) Subject to compliance with Section 14(b)(6), below, in the event of any
termination of this Lease by its terms or by operation of law or any repossession of the Property
pursuant to the terms of this Lease, Lessee, so far as permitted by law, waives (i) any notice of
reentry or of the institution of legal proceedings to that end, (ii) any right of redemption, re-entry
or repossession, and (iii) the benefits of any laws now or hereafter in force exempting property
from execution for rent or for debt.
(5) Lessor's exercise of any or all of the remedies set forth in this Section
shall not in any way restrict Lessor's right to exercise any or all available remedies at law and in
equity.
(6) Notwithstanding anything to the foregoing in this Section 14(b), Lessor
and Lessee acknowledge that Lessee intends to invest substantial capital and time in the
Improvements and operations on the Property and, as a result, termination of this Lease, or
repossession by Lessor of the Property may result in a substantial hardship to Lessee.
Accordingly, prior to any termination of this Lease by Lessor or repossession by Lessor of the
Property due to an alleged Event of Default, Lessor and Lessee agree first to try in good faith to
Page 7 of 12
settle the dispute by mediation. The parties shall use a mediation expert reasonably acceptable to
both sides and shall convene the mediation at a location mutually acceptable to the parties in the
State of Colorado. The costs of mediation shall be borne equally by the parties. In the event the
parties are unable to resolve the dispute by mediation through the exercise of good faith efforts
by the date that is sixty (60) days from the occurrence of the Event of Default, then Lessor shall
be entitled to pursue the remedies set forth in this Section 14(b), and Lessor shall be entitled in
the pursuit of such remedies to recover the costs of mediation incurred by Lessor hereunder.
Section 15. Waivers. Failure of Lessor or Lessee to complain of any act or omission
on the part of the other party, no matter how long the same may continue, shall not be deemed to
be a waiver by said party of any of its rights hereunder. No waiver by Lessor or Lessee at any
time, express or implied, of any breach of any provision of this Lease shall be deemed a waiver
of a breach of any other provisions of this Lease or a consent to any subsequent breach of the
same or any other provision. No acceptance by Lessor of any partial payment shall constitute an
accord or satisfaction but shall only be deemed a part payment on account.
Section 16. Force Majeure. In the event that Lessor or Lessee shall be delayed in,
hindered in, or prevented from the performance of, any act required hereunder by reason of
strikes, lockouts, labor troubles, inability to procure materials, failure of power, restrictive
governmental laws or regulations, voter approved ballot initiatives, riots, insurrection, war or
other reason beyond their control, then performance of such act shall be excused for the period of
the delay and the period for the performance of any such act shall be extended for a period
equivalent to the period of such delay.
Section 17. Notice. Every notice, approval, consent or other communication
authorized or required by this Lease shall not be effective unless same shall be in writing and
personally delivered or sent postage prepaid by United States registered or certified mail, return
receipt requested, addressed to the other party as follows:
As to Lessors:
As to Lessee:
Mark A. and Lee E. Kauffman Partnership, and,
Kauffman Brothers Limited Partnership
8616 CR 63
Keenesburg, CO 80643
Cureton Front Range LLC, a
Delaware Limited Liability Company
1550 Larimer Street, Suite 266
Denver, CO 80202
720-390-4502 Office; 303-519-7246 Cell Phone
Either party to this Lease may from time to time change its address for receipt of notice and other
communications by giving notice to the other party in writing and in accordance with the
procedure set forth above in this Section.
Section 18. Certificates. Either party shall without charge at any time and from time
to time, within thirty (30) days after written request of the other, certify by written instrument
duly executed and acknowledged to any mortgagee or purchaser, or proposed mortgagee or
Page 8 of 12
proposed purchaser, or any other person, firm or corporation specified in such request: (i)
whether this Lease has been supplemented or amended and if so the substance of the supplement
or amendment; (ii) whether the Lease is in full force and effect; (iii) whether any default exists
under this Lease; (iv) whether any offsets, counterclaims or defenses exist; (v) the
commencement and expiration dates of the Term; and (vi) with respect to any other matters
reasonably requested. Any certificate may be relied upon by the party requesting and receiving
it.
Section 19. Governing Law. The terms and conditions of this Lease shall be
governed, interpreted, constructed, regulated and enforced by the laws of the State of Colorado.
Section 20. Partial Invalidity. If any term, covenant, condition or provisions of this
Lease or the application thereof to any person or circumstance shall at any time or to any extent
be invalid or unenforceable, the remainder of this Lease or the application of such term or
provision to persons or circumstances other than those to which it is held invalid or
unenforceable shall not be affected and each term, covenant, condition and provision of this
Lease shall be valid and be enforced to the fullest extent permitted by law.
Section 21. Entire Agreement. No oral statement or prior written matter shall have
any force or effect. Lessee agrees that it is not relying on any representations or agreements
other than those contained in this Lease.
Section 22. Parties. Except as herein otherwise expressly provided the covenants,
conditions and agreements contained in this Lease shall bind and inure to the benefit of Lessor,
Lessee and their respective successors, administrators, heirs and assigns.
Section 23. Recording. Upon the mutual execution and delivery of this Lease, Lessee
shall have the right to record a Memorandum of this Lease in the Clerk and Recorder's Office of
Weld County, Colorado.
Section 24. Voluntary Termination Right. Notwithstanding anything to the contrary in
this Lease, Lessee shall have the right at any time to terminate this Lease upon not less than six
(6) months prior written notice. However, in the event Lessee terminates prior to the end of the
fifth Lease Year and has commenced construction of the Facility, Lessee shall pay the remaining
balance of the Five Years of Base Rent to Lessor. Such rent shall be deemed liquidated damages.
The liquidated damages are intended to represent estimated actual damages and are not intended
as a penalty, and Lessee shall pay them to Lessor without limiting Lessee's right to terminate this
Lease for default as provided elsewhere herein. Upon the date of termination specified in such
written notice from Lessee, this Lease shall terminate and the parties shall have no further rights
or obligations hereunder, except as expressly survive expiration or termination hereof.
Section 25. General Indemnity: Lessee, and its successors and assigns hereby
indemnifies and saves harmless the Lessor, and its successors and assigns from and against any
and all claims, demands, actions, suits, losses, costs, charges, expenses, damages and liabilities
whatsoever which Lessor may pay, sustain, suffer or incur by reason of or in connection with the
Lease or any activities occurring on the Property, including, without limiting the generality of the
foregoing, all costs and expenses (including legal expenses) incurred in connection with any such
Page 9 of 12
loss or damage, unless such claims, demands, actions, suits, losses, costs, charges, expenses,
damages and liabilities arise from Lessee's intentional act, willful misconduct, or sole
negligence.
Section 26. Subsequent Recording: Lessee has the right to record a memorandum and
"as -built" as -built legal description of the final location.
IN WITNESS WHEREOF, the parties hereto have hereunder set their hands as of the day
and year first -above written.
LESSORS:
MARK AND LEE KAUFFMAN PARTNERSHIP
By: Ma' << A• K este. �-�—r...--
Mark A. Kauffman, General Partner
KAUFFMAN BROTHERS LIMITEDPARTNERSHIP
By: Inc' 'leA - meta. --�/ - �, f.__.._
Mark A. Kauffman, General Partner
LESSEE:
CURTON FRONT RANGE LLC
By: c
Daniel Seaver
Its: Managing Partner
Page 10 of 12
ACKNOWLEDGMENTS
STATE OF COLORADO
COUNTY OF tutIK
)ss.
The foregoing instrument was acknowledged before me this -29 4ay of
A u 44 ua r , 2018, by Mark A. Kauffman as General Partner of the MARK A. AND LEE E.
KAUEFMAN PARTNERSHIP.
Witness my hand and official seal.
My Commission Expires:
4
JAMES FOSTER
NOTARY PUBLIC
STATE OF COLORADO
NOTARY ID 1 20144040095
MY COMMISSION EXPIRES OCTOBER 14. 2018
STATE OF COLORADO
COUNTY OF W t /l
)ss.
The foregoing instrument was acknowledged before me this oc tray of
A v vs T , 2018, by Mark A. Kauffman as General Partner of the KAUFFMAN
BROTHERS LIMITED PARTNERSHIP.
Witness my hand and official seal.
My Commission Expires: l
JAMES FOSTER
NOTARY PUBLIC
STATE OF COLORADO
NOTARY ID 0 20144040095
MY COMMISSION EXPIRES OCTOBER 14, 2018
Page 11 of 12
THE STATE OF COLORADO
COUNTY OF A'7 VcAN
This instrument was acknowledged before me on this 6 day of Se1 Teti' el
2018, by Daniel Seaver, as Managing Partner, of Cureton Front Range LLC, a Delaware Limited
Liability Company, and being authorized to do so, on behalf of said company.
f _
JAMES FOSTER
NOTARY PUBLIC
STATE OF COLORADO
NOTARY ID 0 20144040095
MY COMMISSION EXPIRES OCTOBER 14. 2018
1
N Public in and for
The State of Colorado
MY COMMISSION EXPIRES:
Sy -20/
Page 12 of 12
Phone
Fax
Weld County Public Works Dept.
1111 H Street
P.O. Box 758
Greeley, CO 80632
Phone: (970)304-6496
Fax: (970)304-6497
Property Owner
Name Mark and Lee Kauffman Partnership
Company
Address 8616 WCR 63
ACCESS PERMIT
APPLICATION FORM
Authorized Agent/Applicant (if different from Owner)
Name Nick Holland
Company Cureton Midstream
Address 518 17th Street, Suite 650
City Keenesburg State CO zip 80643 City Denver State CO Zip 80202
Phone 720-390-4506
E-mail
Parcel Location
The access is on WCR 398
Nearest Intersection: WCR 398
& WCR 63
Fax
E-mail Nick.Holland@curetonmidstream.com
Existing County Road Surface Information
Asphalt V Gravel Treated Other
Dist. from Intersection (approx. in ft.) 5280 Proposed Access Information
Parcel Number(s) 1303-20-0-00-004 Culvert Size & Type (15" CMP/RCP min.)
Section/Township/Range NE4 20 -2N -63W Materials used to construct access
Total # of Existing Accesses to parcel 1
Proposed Use
❑ Temporary (Tracking Pad Required) On
o Small Commercial (#)
Access Construction Start Date 1/1/2019
Access Construction Finish Date 9/1/2019
o Single Residential (#) a Oil & Gas (#
o Large Commercial (#) o Industrial f#)
o Field (Agriculture Only) (#) o Subdivision J#)
Is this access associated with a Planning or Building Department Process?
✓ USR/MUSR o RECX/SUBX o PUD o WOGLA o COMPLEX (IA required)
Planning/Building Department case # Not assigned yet
o Other
Required Attached Documents
- Traffic Control Plan (a generic plan can be found at https://www.weldgov.com/departments/public works/permits/)
During the review process it may be determined that a right-of-way use permit will be required as well.
- Certificate of Insurance (with "Weld County, Colorado" listed as the certificate holder & as an additional insured)
- Access Pictures (from the left, right, into & out of the access — N, 5, E, & W)
- Access Authorization Form (Not required if the application is signed by the landowner.)
Fee schedule (to be determined by permitting agency)
- $75 each access point: Temporary, Small Commercial, Oil & Gas, Single Family Residential
- $150 each access point: Industrial, Large Commercial, Subdivisions
- Field (Agriculture only): no cost
Parcel Sketch (or provide an aerial on an add] sheet)
♦ = Existing Access A= Proposed Access
T
N
Description of Work or Reason for Permit
Access Permit on an existing access for use associated with natural
gas compressor facility. Being submitted for concurrent processing
with the USR Application.
By accepting this permit, the undersigned Property Owner/Authorized Agent, under penalty of perjury, verifies they have received all
pages of the permit application; they have read and understand all the permit requirements and provisions set forth on all pages. By
virtue of their signature the Property Owner/Authorized Agent is bound by and agrees to comply with all said permit requirements
and provisions, all Welcittzu rdicrances, and state laws regarding access construction
Signature Printed Nam 7/$I -M )01141t' Date /04rAt
Signature Printed Name Date
(In case of multiple Property Owners/Authorized Agents)
• Access Permits are good for 1 year from the date of issuance. Property Owner/Authorized Agent must obtain a new
permit or request an extension if the construction of the access point is not completed in that timeframe.
• Extensions are subject to approval by Public Works
• County regulations on road access can be found in Article V of Chapter 12 of the Weld County Code
CUREfON
MIDSTREAM
518 17111 STREET SUITE 650
DENVER, CO 80202
PHONE 303 324 5967
October 22, 2018
We, Cureton Midstream, LLC, give permission to Anne Best Johnson from Tetra Tech to apply for any
Land Use Planning Permits or services for the property located in the NE4 of Section 20, Township 2
North, Range 63 West of the 6th P.M., Weld County, Colorado. The property is also known as Weld
County Parcel 1303-20-0-00-004. Email correspondence should be sent to both Authorized Agent and
client.
Authorized Agent contact information:
Anne Best Johnson
Tetra Tech
1560 Broadway, Suite 1400
Denver, CO 80202
(720) 204-0173 — cell
(720) 931-9373 — office
AnneJohnson@tetratech.com
Client contact information:
Executed by:
Nicholas Holland
Cureton Midstream
518 17th Street, Suite 650
Denver, CO 80202
(720) 390-4506 — office
(303) 324-5967 — cell
Nick.Holland@curetonmidstream.com
.t,
Name (Print) _Nicholas Holland Date 10/22/2018
•
7 4101;1 114
Looking to the West:
Typical Traffic Control Plan Diagram
ROAD
WORK
AHEAD
500 FT
O
O
O
i
500 FT
Notes:
I . The above diagram is typical for normal shoulder work applications. Additional signing may be
required.
2. Vehicles or construction equipment shall not be parked in the travel way and should be moved to the
shoulder. If vehicles or construction equipment are not able to be moved out of the way of traffic,
channelizing devices are required for day use only. No night time obstructions are allowed.
AC RE® CERTIFICATE
OF
LIABILITY
INSURANCE
DATE IMM/DDIYYYY)
9/14/2018
THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE HOLDER. THIS
CERTIFICATE DOES NOT AFFIRMATIVELY OR NEGATIVELY AMEND, EXTEND OR ALTER THE COVERAGE AFFORDED
BY THE POLICIES
BELOW. THIS CERTIFICATE OF INSURANCE DOES NOT CONSTITUTE A CONTRACT BETWEEN THE ISSUING INSURER(S), AUTHORIZED
REPRESENTATIVE OR PRODUCER, AND THE CERTIFICATE HOLDER.
IMPORTANT: If the certificate holder
If SUBROGATION IS WAIVED, subject
this certificate does not confer rights
is an ADDITIONAL INSURED, the policy(ies) must have ADDITIONAL INSURED provisions or be endorsed.
to the terms and conditions of the policy, certain policies may require an endorsement. A statement on
to the certificate holder In lieu of such endorsement(s).
PRODUCER
Marsh
5950
Dallas,
Wortham,
Sherry
a division of Marsh USA, Inc.
Lane, Suite 500
TX 75225
CONTACT
NAME: (DAL) Ruth Barns
PHONE u 469-759-1754
(A/C, No]:
ADDRESS: ruth bangsgwortharninsurance corn
www dallas worthaminsurance corn _
INSURER(S) AFFORDING COVERAGE
NAIC M
INSURER A : Federal Insurance Company
20281
INSURED
Cureton Midstream, LLC
17th Street, Suite
Denver CO 80206
650
INSURER a: AXIS Surplus Insurance Company
26620
INSURER Arch Insurance Company
11150
INSURER D:
INSURER E :
INSURER F :
CERTIFICATE NUMBER:
•
THIS
INDICATED
CERTIFICATE
EXCLUSIONS
IS TO CERTIFY THAT THE POLICIES OF INSURANCE LISTED BELOW HAVE BEEN ISSUED TO THE INSURED NAMED ABOVE FOR THE POLICY PERIOD
NOTWITHSTANDING ANY REQUIREMENT, TERM OR CONDITION OF ANY CONTRACT OR OTHER DOCUMENT WITH RESPECT TO WHICH THIS
MAY BE ISSUED OR MAY PERTAIN, THE INSURANCE AFFORDED BY THE POLICIES DESCRIBED HEREIN IS SUBJECT TO ALL THE TERMS
AND CONDITIONS OF SUCH POLICIES LIMITS SHOWN MAY HAVE BEEN REDUCED BY PAID CLAIMS.
INS
1 TYPE OF INSURANCE 1ADDC SLJ
INSD POLICY NUMBER
POLICY EFF
JMM:DO/YYYYI
POLICY EXP
M/
IMOD/YYYY)
LIMITS
A
COMMERCIAL GENERAL LIABILITY
1
3604-54-01
9/14/2018
9/14/2019
,
EACH OCCURRENCE
$1,000,000
CLAIMS -MADE
OCCUR
DAMAGE TO RENTED
PREMISES (Ea ocasrancei
51 ,000,000
Includes SBA lime -Element
saw EXP (Any oneperson)
$ 10,000
Pollution
PERSONAL A ADV INJURY
51,000.000
GEM.
AGGREGATE LIMIT APPLIES PER
GENERAL AGGREGATE
$ 2,000,000
POLICY
PRO -
JJECTT
LOC
PRODUCTS-COMP/OP AGG
$ 2,000,000
OTHER
s
A
AUTOMOBILE
LIABILITY
7360.47-65
•
9/14/2018
9/14/2019
(CAMBIIN j INGLE UMiT
$1000,000
ANY AUTO
BODILY INJURY (Per person)
S
OWNED
SCHEDULED
BOOtLY INJURY (Per accident)
S
AUTOS ONLY
AUTOS
MIRED
AUTOS ONLY
et
NON -OWNED
AUTOS ONLY
PROPERTY DAMAGE
(Par acodentl
$
s
A
UMBRELLA LEAS I
7818-68-33
9/14/2018
9/14/2019
EACH OCCURRENCE
$ 5,000_000
OCCUR
EXCE UAB I
CLAMS -MADE
AGGREGATE
$ 5,000,000
ISS
DED 1
RETENT ON I $
S
A
WORKERS COMPENSATION
AND EMPLOYERS' UABIUTY Y I N/
N / A
7175-50-19
9/14/2018
9/14/2019
PE urEJ
0TH 1.000.000
E L EACH ACCIDENT I $ 1,000 000
ANYPROPRIETORIPARTNER/EXECUTIVE
OFFICER/MEMBEREXCLUDED,
EL DISEASE EA EMPLOYE
S 1-000,940
(Mandatory In NH)
It yyes. desa)be under
OESCR PT1ON Or OPERAr ons Wort
E L DISEASE POUCY LIMIT
S
B
C
Excess Liability
Excess Liability
EAU626209
UXP1014788.01
9/14/2018
9/14/2018
9/14/2019
9/14/2019
10,000.000 Aggregate
10,000,000 Aggregate
DESCRIPTION Of OPERATIONS ' LOCATIONS / VEHICLES (ACORD 101 Additional Remarks Schedule_ may be attached If more
Additional Insured VVeld County Colorado
The General Liability and Auto Liability include an automatic additional insured endorsement that
certificate holder when there is a written contract between the named insured & the Certificate Holder
spas Is required)
provides Additional Insured status to the
OLDER
Weld County Public Works Department
PO Box 755
1111 H Street
Greeley CO 80632
CANCELLATION
SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED BEFORE
THE EXPIRATION DATE THEREOF, NOTICE WILL BE DELIVERED IN
ACCORDANCE WITH THE POLICY PROVISIONS.
AUTHORIZED REPRESENTATIVE
Marsh Wortham a dcvision of Marsh USA, Inc
:1988-2015 ACORD CORPORATION. All rights reserved.
ACORD 25 (2016/03) The ACORD name and logo are registered marks of ACORD
44209886 126CJRETMID 117/18 GL, BA. LIMB, MC I CAL) Ruth 8engs 19/14/2'18 1:33:n3 PM i+_07 Page 1 ,:t I
Notice of Inquiry
Development within a Coordinated Planning Agreement
or Intergovernmental Agreement (CPA or IGA) Boundary
Date of Inquiry
9/20/2018
Municipality with CPA or IGA
Keenesburg CPA
Name of Person Inquiring
Anne Johnson
Property Owner
Kauffman Mark & Lee Partnership
Planner
Diana Aungst daungst@weldgov.com
Legal Description
NE4 20-2-63
Parcel Number
1303-2000-0004
Nearest Intersection
CR 18 and CR 65
Type of Inquiry
PRE18-0259 Gas compressor
The above person inquired about developing a property inside your designated CPA or IGA boundary. This person
has been referred to community by Weld County Planning to discuss development options on this site. Visit
Chapter 19 of the Weld County Code for specifics on your agreement.
Weld County Comments
Do you wish to annex?
Name/Title of Municipality Representative
Municipality Comments
a�� c' \i.ucyU30:1( Ma>s�t Ear_ g
‘ZatAccipim Ck x' 5 Riot otv:Jh to (Mmfy at Aft) ir1g('
1) CthCCL LQX
Signature of Weld County Planner
L 44
[4'11
of Municipality Representati e
Please return the signed form to
Weld County Planning Department
1555 N 17th Avenue, Greeley, CO 80631
(970) 353-6100 x3540 ` (970)304-6498 fax
Samuel Engineering
We Provide Solutions
8450 E. Crescent Parkway, Suite 200 Phone: 303-714-4840
Greenwood Village, Colorado 80111 Fax: 303-714-4800
FINAL DRAINAGE REPORT
CE -201
PREPARED FOR:
Cureton Midstream, LLC
Miskey Compressor Station
Project Number 18177
The Miskey Compressor Station is located on a 20 -acre leased parcel as part of
Section 20, Township 2 North, Range 63 West, 6th Principal Meridian, Weld
County, Colorado
PREPARED BY:
SAMUEL ENGINEERING, INC.
8450 EAST CRESCENT PARKWAY, SUITE 200
GREENWOOD VILLAGE, CO 80111
ISSUED FOR USR PERMIT
Revision A
Engineering
•
Project Controls
•
Estimating
•
Construction Management
Samuel Engineering
We Provide Solutions
8450 E. Crescent Parkway, Suite 200 Phone: 303-714-4840
Greenwood Village, Colorado 80111 Fax: 303-714-4800
Originator/Lead Engineer:
Project Engineer Approval:
Project Manager Approval:
Client Approval:
RECORD OF REVISIONS
Michael Cloud
Brandon Primeaux
Cole Ones
Date:
Date:
Date:
Date:
10/18/18
8/10/18
8/10/18
Rev. No.
By
Revisions
Approval
Date
A
M. Cloud
Issued for Permit
MTC
10/18/18
Current Working Revision Rev. A Date 10/18/18
Engineering ♦ Project Controls ♦ Estimating ♦ Construction Management
Samuel Engineering
We Provide Solutions
8450 E. Crescent Parkway, Suite 200
Greenwood Village, Colorado 80111
Phone: 303-714-4840
Fax: 303.714-4800
CERTIFICATION OF COMPLIANCE
ENGINEERING DESIGNED TO WELD COUNTY CODE STANDARDS AND CRITERIA
CURETON MIDSTREAM, LLC — LOST CREEK COMPRESSOR STATION
I, Michael Cloud, Consultant Engineer for Cureton Midstream, LLC ("Applicant"), understand and
acknowledge that Applicant is seeking to develop the property described in the following Drainage
Report. I have designed or reviewed the design ("Design") for the proposed land use set forth in the
Application. I hereby certify, on behalf of Applicant that the Design will meet all applicable drainage
requirements of the Weld County Code with the exception of variance(s) described below. This
certification is not a guarantee or warranty either expressed or implied.
(Engineer's Stamp)
Engineer of Record Signature
1)
2)
3)
VARIANCE REQUEST
Describe the Weld County Code criteria of which a variance is being requested.
Describe why it is not possible to meet the Weld County Code.
Describe the proposed alternative with engineering rational which supports the intent of the Weld County Code.
Respectfully request to utilize a retention pond rather than a detention pond for stormwater
management. The existing site currently drains to an existing reclaimed borrow pit that will be
converted to a retention basin with emergency overflow spillway. The existing borrow pit low point is
several feet lower than the grades surrounding it making it impossible to drain the pond with a gravity
pipe.
I understand
downstream
based
Planning
and agree that the intention of the Code is to reduce impacts of development on neighboring
properties and the public. I understand if this variance is approved it is not precedent setting and is
on site specific constraints.
Director Approval indicated when signed by director or appointee:
Planning Director Name
Signature
Date of Approval
Table of Contents
S:\Projects\18177 Miskey_Compressor\Engineering\Civil\Reports\Drainage Report\Cureton Miskey CS Final Drainage docx
Samuel Engineering
Wi hovi[f. So+.bra
Samuel Engineering
We Provide Solutions
8450 E. Crescent Parkway, Suite 200 Phone: 303-714-4840
Greenwood Village, Colorado 80111 Far 303-714-4800
1.0 DESCRIPTION OF PROJECT 1
2.0 CALCULATIONS 1
2.1 DRAINAGE PHILOSOPHY (VARIANCE REQUEST FOR RETENTION BASIN) 1
2.2 HYDROLOGY ....2
2.2.1 Site Soils 2
2.2.2 Design Storm 2
2.2.3 Overall Post -Development Site Imperviousness 2
2.2.4 Peak Flowrate Calculations ....3
2.3 RETENTION POND DESIGN 3
2.3.1 Pond Volume Calculations ,,.3
2.3.2 Pond Stage -Storage for Discharge Calculations 3
2.3.3 Pond Discharge Design 4
2.4 HYDRAULICS 4
2.4.1 Culverts 4
2.4.2 Ditches 5
2.5 GRADING AND DRAINAGE DESIGN 5
3.0 POND MAINTENANCE REQUIRMENTS 5
3.1 ROUTINE MAINTENANCE 5
3.1.1 Inspections 5
3.1.2 Sediment and Debris Management 5
3.1.3 Vegetation Management 6
3.2 NON -ROUTINE MAINTENANCE 6
3.2.1 General 6
3.2.2 Facility Repairs 6
4.0 CONCLUSION 6
APPENDIX A: VICINITY MAP A-1
APPENDIX B: NRCS WEB SOIL SURVEY B-1
APPENDIX C: NOAA RAINFALL DATA C-1
APPENDIX D: AREA WEIGHTED IMPERVIOUSNESS VALUES D-1
APPENDIX E: HYDROLOGIC CALCULATIONS E-1
APPENDIX F: DETENTION BASIN VOLUME BY THE MODIFIED FAA METHOD F-1
APPENDIX G: DETENTION BASIN STAGE -STORAGE G-1
APPENDIX H: DETENTION BASIN OUTLET STRUCTURE DESIGN H-1
APPENDIX I: CULVERT DESIGN I-1
APPENDIX J: CONSTRUCTION DRAWINGS J-1
S:\Projects\18177_Miskey_Compressor\Engineering\Civil\Reports\Drainage Report\Cureton Miskey CS Final Drainage docx
Samuel Engineering
CURETON MIDSTREAM, LLC
MISKEY COMPRESSOR STATION
PROJECT NUMBER: 18177
CE -201, REV. A
FINAL DRAINAGE REPORT
PAGE 1of6
1.0 DESCRIPTION OF PROJECT
The subject property is a 20.00 -acre parcel leased by Cureton Midstream, LLC for the installation
of a gas compressor station and laydown area. The compressor station and access road will
disturb approximately 7.0 acres of the 20.00 -acre site. This project is requesting a variance from
the requirement to construct a detention pond to allow construction of a retention basin.
The project site is a portion of an existing agricultural lot that is not utilized for raising crops. The
existing lot consists of seasonal grasses and a large reclaimed borrow pit (from construction of
the neighboring Plains Oil Terminal facility to the north). Two pipeline right-of-ways bound the
north edge of the lease. Topographic relief over the leased property ranges from 4815' on the
west side of the parcel to 4795' on the east side and is characterized by gently sloping land with
grades that typically range from 2.0% to 3.0%.
The subject property is not part of the Weld County Master Drainage Plan.
There are no open channels, lakes, streams or irrigation ditches in the proposed development.
The subject property is not located in a floodplain. The surrounding area development consists
of agricultural property to the south and west, an oil terminal serviced by rail to the north, and a
large dairy farm to the east.
See Appendix A for project location and vicinity map.
2.0 CALCULATIONS
2.1 DRAINAGE PHILOSOPHY (VARIANCE REQUEST FOR RETENTION BASIN)
The project site drainage must be designed to meet the requirements of Weld County Code —
Article XII. However, because the existing drainage patterns for the drainage basin containing
the site currently drain to a reclaimed gravel borrow pit located within the lease boundary, an
exemption to the requirement for a storm water detention facility is being requested. The
existing reclaimed borrow pit will collect the runoff from the drainage basin and be utilized as a
retention basin. The following criteria are required to be met by retention ponds in Weld
County:
• Retention facilities must be designed to contain 1.5 times the runoff volume generated
by the 24 -hour, 100-yr storm, plus 1 -foot of freeboard. As the borrow pit already exists,
this will be confirmed by computing the volume from the existing topographic survey
contours.
• The retention facility must include an emergency spillway and must show that a spill will
not adversely impact downstream properties or residences. The existing borrow pit is in
an "all cut" situation, so there is no need for a pond berm to be constructed. Because
the entire borrow pit is within the lease boundary, adding a riprap spillway is possible.
The existing drainage on the downgradient side of the pond has been improved
following construction of a neighboring dairy farm, so impacts from the unlikely
overflow of the basin are minimal.
S:\Projects\18177_Miskey_Compressor\Engineering\Civil\Reports\Drainage Report\Cureton Miskey CS Final Drainage.docx
Samuel Engineering
CURETON MIDSTREAM, LLC
MISKEY COMPRESSOR STATION
PROJECT NUMBER: 18177
CE -201, REV. A
FINAL DRAINAGE REPORT
PAGE 2 of 6
2.2 HYDROLOGY
The project site drainage must be designed to meet the requirements of Weld County Code —
Article XII. The retention basin must be sized appropriately to store the runoff volume from 1.5
times the 100 -year 24 -hour storm. Urban Drainage and Flood Control District's (UDFCD) design
manual and worksheets have been used to perform drainage calculations for this study.
2.2.1 Site Soils
The characteristics of the soils on the site contribute to the amount of storm runoff. Regional
soil information is obtained from the National Resource Conservation Service (NRCS) Web Soil
Survey. The entirety of the site soils are Osgood Sand with slopes of 0% to 3% classified as
Hydraulic Soil Group (HSG) A. The existing regional soil information obtained from NRCS is used
for all runoff calculations in undeveloped areas.
See Appendix B for the regional NRCS Web Soil Survey of this site.
2.2.2 Design Storm
The design storms considered for this site are the 100 -year 1 -hour event for the design of
culverts and the 100 -year 24 -hour event for the retention pond sizing. The rational method is
used for determining peak flows and the FAA method is used for determining the runoff volume
for the design storm. Both of these methods require the design storm rainfall depth as an input
to perform the calculations. The rainfall depth for each design storm are:
100 -year 1 -hour = 2.66 in
100 -year 24 -hour = 4.65 in
Refer to Appendix C for NOAA Atlas 14, Volume 8, Version 2 Rainfall Data.
2.2.3 Overall Post -Development Site Imperviousness
The existing site and surrounding areas that contribute storm runoff consist of undeveloped
pasture land with no pavement or structures present so the pre -developed imperviousness is
assumed to be the historical value of 2.0%. The surface of the retention pond is considered to
have a 100% imperviousness value.
Final site development will include gas process equipment and structures such as compressor
skids, storage tanks, compressors, etc. with access roads and gravel pads as well as the retention
pond surface. The developed drainage basin also includes several acres of surrounding
undeveloped areas that cannot be diverted around the site. The developed site contributing to
the retention pond will have a composite imperviousness of 41.46%. The developed pad is
graded to maintain existing flow patterns for the areas that are currently draining into the
borrow pit.
See Appendix D for composite imperviousness calculations.
S:\Projects\18177_Miskey_Compressor\Engineering\Civil\Reports\Drainage Report\Cureton Miskey CS Final Drainage.docx
Samuel Engineering
bit P.. I., M .•d.-l.Ou .
CURETON MIDSTREAM, LLC
MISKEY COMPRESSOR STATION
PROJECT NUMBER: 18177
CE -201, REV. A
FINAL DRAINAGE REPORT
PAGE 3 of 6
2.2.4 Peak Flowrate Calculations
Peak flowrates at design points for each drainage basin are calculated following the UDFCD
design manual and worksheets. Inputs for rational method calculations are determined from
construction drawings MKCS-CE-610, Drainage Basin Map.
Refer to Appendix .1 for construction drawings.
The rational method calculations are developed using Urban Drainage and Flood Control District
Worksheet "UD-Rational v1.02a.xls".
The proposed site is part of an existing drainage basin that currently drains to a reclaimed
borrow pit. The pre -developed major drainage basin (EX -1) will be affected by the new site
access road and has a contributing area of 20.71 acres. Basin EX -1 is undeveloped and has a 100 -
year runoff coefficient Coo= 0.22. The resulting existing peak flow at Design Point 1 is Quo =
9.28 cfs. (See Appendix E, Page E-2)
The developed Basin PR -1 contributing to the converted retention basin has a 100 -year runoff
coefficient C100 = 0.41. The resulting peak flow at Design Point 1 is Qioo = 19.06 cfs. The resulting
flows at Design Point 1 are the design flows that runoff into the detention pond. The 100 -year
developed peak flow will be used as the design flow for the pond overflow weir and the
temporary culvert for the temporary construction access road. (See Appendix E, Page E-3)
The developed Basin PR -1A is the portion of the major basin that is tributary to Culvert 1 and
has a 100 -year runoff coefficient C100= 0.41. The resulting peak flow at Design Point 1A is Qloo =
19.06 cfs. This is the design flow for sizing of Culvert 1. (See Appendix E, Page E-3)
2.3 RETENTION POND DESIGN
2.3.1 Pond Volume Calculations
The retention pond for this site is required to have capacity to store 1.5 times the runoff volume
from the 100-yr 24 -hour storm with 1 -foot of freeboard and an overflow spillway capable of
passing the 100 -year peak flow.
The required storage volumes for the design storm is computed using the FAA method. This
method allows for a simplistic calculation of required storage volume while restricting the pond
outflow to represent full retention. These calculations are developed using Urban Drainage and
Flood Control District Worksheet "UD-Detention v2.35.xls". The computed storage volume for
the 100 -year design storm is 219,209 ft3. The required storage (being 1.5 times the design storm
volume) is 328,814 ft3 or 7.55 acre-feet. (See Appendix F, Page F-2 and F-3)
2.3.2 Pond Stage -Storage for Discharge Calculations
Following the determination of the required storage volumes for the detention pond, the pond
is designed to allow for the storage of the runoff. The proposed detention pond required
volume is achieved by utilizing an existing natural depression on the site.
(See Appendix J for construction drawings)
S:\Projects\18177_Miskey_Compressor\Engineering\Civil\Reports\Drainage Report\Cureton Miskey CS Final Drainage.docx
Samuel Engineering
CURETON MIDSTREAM, LLC
MISKEY COMPRESSOR STATION
PROJECT NUMBER: 18177
CE -201, REV. A
FINAL DRAINAGE REPORT
PAGE 4 of 6
The stage -storage relationship is determined by calculating incremental contour areas and using
the average end area method for computing volume. The key stages for storage volumes are
identified to allow for discharge calculations for the pond outlet structure.
(See Appendix G for pond stage -storage information)
2.3.3 Pond Discharge Design
The retention pond will discharge the collected stormwater by infiltration through the bottom of
the basin. The soils are Type A according to the NRCS Soil Conservation Service Web Soil Survey
which have a typical infiltration rate of 1.63 in/hr. With a bottom area of approximately 160,500
ft2, the pond has an equivalent outflow of 6.06 cfs which will drain the full storage volume of
328,814 ft3 in approximately 15.1 hours. Draining in under 72 hours ensures that the retention
pond does not infringe upon water rights.
The pond is equipped with an emergency overflow spillway to safely pass storm water flow in
excess of the design storm volume. This emergency overflow spillway is designed for the
developed 100 -year peak runoff rate of Qioo = 19.06 cfs while maintaining a flow depth of less
than 6" over the spillway elevation. The overflow weir is designed with side slopes at 4H:1V cut
to the top of the pond embankment. To maintain a flow depth of less than 6", the spillway must
have a width of 30.00 ft. The spillway will be set at an elevation of 4796.10 ft to allow for full
retention of the design storm. (See Appendix H, H-2)
2.4 HYDRAULICS
Due to the type of plant being constructed the site grading will have minimum slopes with the
majority of onsite runoff being conveyed by sheet flow and using culverts to pass flow beneath
plant roads. Shallow swales will be utilized direct flow to the conveyance facilities. The swales
will have shallow slopes and low velocity flows.
2.4.1 Culverts
Per Weld County Code Article XII, Section 23-12-70 A, major drainage systems must be able to
convey the fully developed flow from a watershed for the 1 -hour, 100 -year event without
significant damage to the system. In addition, the Weld County Engineering and Construction
Guidelines dictate that culverts must be sized so that road overtopping does not result in more
than 6 -inches of water in the 10 -year event and 18 -inches of water in the 100 -year event.
Although the local requirements allow for overtopping of the road during the design storms, the
culverts on this site will be sized so that no flow occurs over the road and the relationship of
headwater depth to pipe diameter (HW/D) is 2.0 or less for the 10 -year storm and the allowed
overtopping during the 100 -year storm will be maintained below 6 -inches. This additional
conservatism will ensure that the plant remains accessible even during major storms. The
culvert used on this site is not within Weld County road right-of-way.
The site culvert sizes are verified using Autodesk Hydraflow Express which produces hydraulic
grade lines and computes the upstream headwater elevation to check for overtopping.
S:\Projects\18177_Miskey_Compressor\Engineering\Civil\Reports\Drainage Report\Cureton Miskey CS Final Drainage.docx
Samuel Engineering
CURETON MIDSTREAM, LLC
MISKEY COMPRESSOR STATION
PROJECT NUMBER: 18177
CE -201, REV. A
FINAL DRAINAGE REPORT
PAGE 5 of 6
Culvert 1 will be a 18" RCP Culvert with flared -end sections and will pass the 100 -year developed
flow of 9.48 cfs. This will result in an upstream headwater elevation of 4808.65 ft which results
in an Hw/D ratio of 1.31. This flow condition indicates that the road does not overtop. Culvert 1
is properly sized to convey the design storms. (See Appendix I, Pagel -2)
Temp Culvert will be a 24" RCP Culvert with flared -end sections and will pass the 100 -year
developed flow of 19.06 cfs. This will result in an upstream headwater elevation of 4796.27 ft
which results in an Hw/D ratio of 1.29. This flow condition indicates that the road does not
overtop. Temp Culvert is properly sized to convey the design storms. (See Appendix I, Pagel -3)
2.4.2 Ditches
Roadside conveyance ditches are utilized in cut areas to convey offsite flows around the
developed site and the detention pond. These ditches will receive minimal inflows due to the
positioning of the pad near the crest of a natural ridgeline.
2.5 GRADING AND DRAINAGE DESIGN
The results of this drainage study have been incorporated into the project construction
drawings. See Appendix 1 for Grading and Drainage Plans and Details.
3.0 POND MAINTENANCE REQUIRMENTS
The structural and functional integrity of the retention basin shall be maintained at all times by
removing and preventing drainage interference, obstructions, blockages, or other adverse
effects into, through, or out of the system.
3.1 ROUTINE MAINTENANCE
3.1.1 Inspections
Routine inspections shall be performed a minimum of 2 times annually and after major rainfall
events.
3.1.2 Sediment and Debris Management
Periodic silt removal shall occur when standing water conditions occur or the pond's storage
volume is reduced by more than 10%. Silt shall be removed and the pond/basin returned to
original lines and grades shown on the approved engineering plans (See Appendix J). In addition,
corrective measures are required any time a basin does not drain completely within 72 hours of
cessation of inflow.
Accumulated litter, sediment, and debris shall be removed every 6 months or as necessary to
maintain proper operation of the basin. Disposal shall be in accordance with federal, state and
local regulations.
S:\Projects\18177_Miskey_Compressor\Engineering\Civil\Reports\Drainage Report\Cureton Miskey CS Final Drainage.docx
Samuel Engineering
CURETON MIDSTREAM, LLC
MISKEY COMPRESSOR STATION
PROJECT NUMBER: 18177
CE -201, REV. A
FINAL DRAINAGE REPORT
PAGE 6 of 6
3.1.3 Vegetation Management
Detention facilities shall be mowed monthly between the months of April and October or
anytime vegetation exceeds 12 -inches in height.
3.2 NON -ROUTINE MAINTENANCE
3.2.1 General
The detention basin shall be kept free of excess trash and debris, poisonous and noxious weeds,
contaminants and pollution, rodent holes, standing water harboring insects, and unwanted
vegetation growth (i.e. trees). These potential defects shall be repaired or mitigated to the
original state within 30 days from the date of observation.
3.2.2 Facility Repairs
If upon routine inspection any signs of damage to the emergency spillway or pond embankment
are observed, the feature shall be repaired to the original state within 30 days from the date of
observation.
4.0 CONCLUSION
This drainage study has been prepared in accordance with the Weld County Storm Drainage
Criteria and Urban Drainage Criteria Manuals and accepted Professional Engineering Practices.
This drainage study has been designed to convey developed flows into a retention basin
designed to contain the major design storm. The flows then infiltrate in a manner consistent
with the predevelopment drainage patterns. With a properly constructed and maintained pond
along with the proposed erosion control measures this development will not adversely impact
the existing drainage or existing downstream developments.
S:\Projects\18177_Miskey_Compressor\Engineering\Civil\Reports\Drainage Report\Cureton Miskey CS Final Drainage.docx
Samuel Engineering
..r P,...,w i..n..:w..
1
SECTION 18
ECTION 17
tv
cr
SECTIO 16 N ,
co
SECTION)2
SECTION 30 SECTION 29
I
VICINITY MAP
•
SITE
SECTION 20
102 R63W 6m PM
7
�i
y-FSCALE 1I I 3000'`
SECTION 71
SECTION 28
40° T 56" N
40" T 34` N
0
545900
1
2 -
545900
%%CO
546000
546000
546100
1
Hydrologic Soil Group —Weld County, Colorado, Southern Part
(Miskey Site)
546200
546300
5464
I I I I
546100 546200 546300 546400
I- I
Map Scale: 1:4,760 if pnnted on A landscape (11" x 8.5") sheet.
Meters
0 93 100 200 To
0 200 4(X) 800
Map pro1ecbon: Web Mercator Comer 000rdinabes: WGS84 Edge bcs: 11TM Zone 13N WGS84
Feet
1200
USDA Natural Resources
a Conservation Service
Web Soil Survey
National Cooperative Soil Survey
546600
546520
548300
546700
546700
546900
548900
NI
N
N
1
8
8/29/2018
Page 1 of 4
40° 7 56" N
40° 7 34" N
Hydrologic Soil Group —Weld County, Colorado, Southern Part
(Miskey Site)
Area of Interest (AOI)
Soils
MAP LEGEND
Area of Interest (AOI)
Soil Rating Polygons
II
S
A
AID
B
B/D
C
c/o
D
Not rated or not available
Soil Rating Lines
A
A/D
— B
,y BID
,.46r C/D
,y
• n Not rated or not available
Soil Rating Points
•
•
■
A
A/D
B
• B/D
•
C
• C/D
•
D
0
Not rated or not available
Water Features
Streams and Canals
Transportation
4-f-4 Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
MAP INFORMATION
The soil surveys that comprise your AOI were mapped at
1:24.000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Weld County, Colorado. Southern Part
Survey Area Data: Version 16, Oct 10, 2017
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jul 17, 2015 —Sep
22. 2016
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
USDA Natural Resources
a Conservation Service
Web Soil Survey
National Cooperative Soil Survey
8/29/2018
Page 2 of 4
Hydrologic Soil Group —Weld County, Colorado, Southern Part
Miskey Site
Hydrologic Soil Group
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
47
49
Olney fine sandy loam,
1 to 3 percent slopes
Osgood sand, 0 to 3 A
percent slopes
Totals for Area of Interest
Description
B
35.1
55.7
38.7%
61.3%
90.8 100.0%
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long -duration storms.
The soils in the United States are assigned to four groups (A, B, C. and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink -swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in
their natural condition are in group D are assigned to dual classes.
Rating Options
Aggregation Method: Dominant Condition
USDA Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
8/29/2018
Page 3of4
B-4
Hydrologic Soil Group —Weld County, Colorado, Southern Part Miskey Site
Component Percent Cutoff- None Specified
Tie -break Rule: Higher
USDA Natural Resources Web Soil Survey
a Conservation Service National Cooperative Soil Survey
8/29/2018
Page 4 of 4
B-5
Precipitation Frequency Data Server https:Mdsc.nws.noaa.govtuiscipfds/pfds_printpage.html?lat=40.1258&...
Santa Penca
NOAA Atlas 14, Volume 8, Version 2
Location name: Keenesburg, Colorado, USA*
Latitude: 40.1258°, Longitude: -104.4585°
Elevation: 4816.9 ft**
• source ESRI Maps
" source USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
Deborah Martin Sandra PaiAovic. Isharr Roy. Mchael St. Laurent. Carl Trypaluk. Dale
Unruh. Michael Yekta. Geoltery Bonrnn
NOAH National Weather Service. Silver Spring, Maryland
PF tabular I PF graphical I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1
Duration
Average recurrence interval (years)
1
2
5
10
25
50
100
200
500
1000
5 -min
0.246
(0.197-0.310)
0.299
(0.239-0.376)
0.397
(0.316-0.501)
0.491
(0.388-0.622)
0.637
(0.495-0.856)
0.764
(0.575-1.03)
0.903
(0.654-1.25)
1.06
(0.732-1.50)
1.28
(0.850-1.85)
1.46
(0.938-2.12)
10 -min
0.361
(0.288-0.454)
0.437
(0.350-0.551)
0.582
(0.463-0.734)
0.719
(0.569-0.911)
0.933
(0.724-1.25)
1.12
(0.842-1.51)
1.32
(0.958-1.83)
1.55
(1.07-2.19)
1.87
(1.24-2.71)
2.14
(1.37-3.11)
15 -min
0.440
(0.352-0.553)
0.533
(0.426-0.672)
0.709
(0.565-0.895)
0.876
(0.694-1.11)
1.14
(0.883-1.53)
1.36
(1.03-1.84)
1.61
(1.17-2.23)
1.89
(1.31-2.67)
2.28
(1.52-3.31)
2.61
(1.68-3.79)
30 -min
0.588
(0.471-0.740)
0.712
(0.569-0.897)
0.946
(0.753-1.19)
1.17
(0.924-1.48)
1.52
(1.18-2.04)
1.82
(1.37-2.46)
2.15
(1.56-2.98)
2.52 3.05
(1.75-3.57) (2.03-4.43)
3.49
(2.24-5.08)
60 -min
0.724
(0.579-0.911)
0.869
(0.694-1.09)
1.15 1.42
(0.915-1.45) (1.13-1.80)
1.86
(1.45-2.51)
2.24
(1.69-3.04)
2.66
(1.93-3.69)
3.14
(2.18-4.45)
3.82
(2.55-5.55)
4.39
(2.82-6.39)
2 -hr
0.859
(0.692-1.07)
1.03
(0.826-1.28)
1.35
(1.09-1.69)
1.68
(1.34-2.11)
2.20
(1.73-2.94)
2.66
(2.02-3.58)
3.17
(2.33-4.36)
3.75
(2.63-5.28)
4.60
(3.09-6.61)
5.30
(3.43-7.62)
3 -hr
0.937
(0.759-1.16)
1.11
(0.898-1.38)
1.46
(1.17-1.81)
1.80
(1.44-2.25)
2.37
(1.87-3.16)
2.87
(2.20-3.85)
3.43
(2.53-4.70)
4.07
(2.87-5.70)
5.00
(3.38-7.16)
5.78
(3.77-8.27)
6 -hr
1.10
(0.898-1.36)
1.29
(1.05-1.59)
1.67
(1.36-2.06)
2.05
(1.66-2.54)
2.67 3.22
(2.13-3.53) (2.49-4.28)
3.84
(2.85-5.21)
4.54
(3.23-6.29) I
f 5.56
(3.79-7.89)
6.42
(4.22-9.09)
12 -hr
1.30
(1.07-1.58)
1.54
(1.26-1.87)
1.98
(1.62-2.42)
2.39
(1.95-2.94)
3.04
(2.43-3.95)
3.61
(2.79-4.70)
4.22
(3.15-5.63)
4.89
(3.50-6.68)
5.87
(4.03-8.21)
6.67
(4.43-9.36)
24 -hr
1.54
(1.27-1.86)
1.82
(1.50-2.20)
2.32
(1.91-2.81)
2.77
(2.27-3.38)
3.46
(2.76-4.40)
4.03
(3.14-5.18)
4.65
(3.49-6.11)
5.31
(3.82-7.15)
6.26
(4.33-8.63)
7.02
(4.71-9.75)
2 -day
1.76
(1.47-2.11)
2.11
(1.75-2.52)
2.69
(2.24-3.24)
3.20
(2.64-3.87)
3.93
(3.15-4.92)
4.52
(3.53-5.72)
5.13
(3.87-6.64)
5.77 6.66
(4.18-7.65) (4.63-9.05)
7.35
(4.97-10.1)
3 -day
1.92
(1.61-2.29)
2.27
(1.90-2.71)
2.87
(2.39-3.43)
3.39
(2.81-4.06)
4.13
(3.32-5.13)
4.72
(3.71-5.93)
5.33
(4.05-6.86)
5.98
(4.35-7.88)
6.87
(4.81-9.28)
7.56
(5.15-10.3)
4 -day
2.05
(1.73-2.44)
2.40
(2.02-2.86)
3.00
(2.51-3.58)
3.52
(2.93-4.21)
4.26
(3.445.28)
4.86
(3.83-6.09)
5.48
(4.17-7.01)
6.13
(4.48-8.04)
7.02
(4.93-9.44)
7.72
(5.28-10.5)
7 -day
2.34
(1.98-2.76)
2.73
(2.31-3.22)
3.37
(2.84-3.98)
3.92
(3.28-4.65)
4.68
(3.80-5.73)
5.29
(4.19-6.55)
5.90
(4.52-7.48)
6.54
(4.81-8.49)
7.41
(5.24-9.86)
8.07
(5.56-10.9)
10 -day
2.60
(2.21-3.04)
3.01
(2.56-3.54)
3.70
(3.13-4.36)
4.28
(3.60-5.05)
5.07
(4.12-6.16)
5.69
(4.52-7.00)
6.31
(4,85-7.93)
6.94
(5.12-8.95)
7.78
(5.52-10.3)
8.42
(5.83-11.3)
20 -day
3.34
(2.86-3.88)
3.84
(3.28-4.46)
4.64
(3.96-5.41)
5.30
(4.49-6.20)
6.18
(5.06-7.41)
6.85
(5.48-8.32) I
1 7.51
(5.81-9.32)
8.16
(6.07-10.4)
9.01
(6.45-11.8)
9.64
(6.74-12.8)
30 -day
3.94
(3.39-4.55)
4.51
(3.88-5.22)
5.42
(4.64-6.29)
6.16
(5.24-7.17)
7.13
(5.86-8.48)
7.86
(6.32-9.48)
8.57
(6.66-10.6)
9.26
(6.92-11.7)
10.1
(7.29-13.1)
10.8
(7.58-14.2)
45 -day
4.67
(4.04-5.37)
5.35
(4.62-6.16)
6.42
(5.53-7.41)
7.27
(6.22-8.42)
8.39
(6.91-9.89)
9.20
(7.43-11.0)
9.98
(7.80-12.2)
10.7
(8.05-13.4)
11.7
(8.42-15.0)
12.3
(8.71-16.1)
60 -day
5.27
(4.57-6.03)
6.05
(5.24-6.94)
7.28
(6.29-8.36)
8.24
(7.08-9.51)
9.49
(7.84-11.1)
10.4
(8.41-12.4)
11.2
(8.80-13.7)
12.0
(9.05-15.0)
13.0
(9.43-16.6)
13.7
(9.71-17.8)
1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency
estimates (tor a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at
upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical
C-2
I ot'4 8/29/2018, 4:>> PM
Precipitation Frequency Data Server
hops: /hdsc.nws.noaa.gov/hdsc/pfds/pfds j,rintpage.htm I?Iat=40.1258&...
Precipitation depth (in)
Precipitation depth (in)
14
12
10
8
6
4
2
0
C c c
in 6 n
in
r1 r -r
PDS-based depth -duration -frequency (DDF) curves
Latitude: 40.1258°, Longitude- -104.4585°
NOAA Atlas 14, Volume 8. Version 2
r
N
L
t
r-1
Duration
LS
L
to to iv
N ritqi
mm
N O
5 10 25 50 100 200
Average recurrence interval (years)
Created (GMT): Wed Aug 29 22:53 30 2018
Back to Top
fIII 7pm o
S
oo -O7
N '4 fr1
Maps & aerials
Small scale terrain
500 1000
Average recurrence
interval
(years)
1
2
5
- 10
- 25
50
100
- 200
- 500
- 1000
Duration
5{rw1 — 2 day
10 -men -- 3 -day
15 -man — 4 -day
- 30 -min — 7 -day
— 60 -man — 10 -day
2 -hr — 20 -day
3.4n — 30 -day
- 6-+1r — 45 -day
- 12 -hr — 60 -day
24 -hr
2of4
C-3
8/29/2018, 4:53 PM
Precipitation Frequency Data Server https://hdsc.nws.noaa.gov/hdsc-pfds/pfds_printpage.html?Iat=40.1258&...
Large scale terrain
to
For tcollins
•
4345 rte
H
Boulder
t-
en
rti
Is
•
Cheyenne
Greeley
Langrnori
a.—
Denver
•
100km
60mi
U N I
Large scale map
1 VVRIII
60mi Coloncr
Springs
Large scale aerial
Back to Top
US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Water Center
1325 East West Highway
Silver Spring, MD 20910
Questions? HDSC.Questions@noaa.gov
C-4
3 of 4 8/29/2018, 4:53 PM
AREA WEIGHTED IMPERVIOUSNESS VALUES
CURETON MISKEY COMPRESSOR STATION
SECTION 20, TOWNSHIP 2 N, RANGE 63 W - WELD COUNTY, CO
HISTORIC CONDITIONS
Surface
Characteristic
A, acre
Basin 1
%
Al
Undeveloped
20.71 2 41 42
A,;tai, acre
Imerel a
20.71
2.0
DEVELOPED CONDITIONS TRIBUTARY TO DETENTION POND
Surface
Characteristic
A, acre
0.0041 90 0.37
0.1849 80 14.79
0.6050 80 48.40
7.1995 40 287.98
4.9158 100 491.58
7.8054 2 15.61
Basin IA
I, %
Al
Roofs
Equipment Pads
Gravel Roads
Gravel Surface/Roadbase
Pond Surface
Undeveloped
A.aat. acre
Iwe,gnted.
20.71
41.46
Table RO-3 Recommended Percentage Imperviousness Values
Land Use or
S ,.dace Characteristics
Percentage
mperv.ousness
8-siness:
Corrmertal areas
95
Neighborhaoa areas
85
Residents:
S rig e -family
'
Mult-unit (detached)
8C
Mutt -unit (attached;
75
Half -acre lot or larger
Apartmens
8C
lndustria :
9": areas
80
Heavy areas
90
Parks. cemetenes
5
P aygrouncs
10
Schools
50
Railroad yara areas
15
Undeveloped Areas:
Historic flaw analysis
2
Greenbelts. agnculura
2
C f -site flow analyss
;when land use not der fled:
45
Streets:
Paved
100
Gravel (packed)
40
Drive and wa is
9C
Roofs
90
awns sarcy soil
0
_awns clayey soil
0
' See Figures RC. -.3 through RO-5 for percentage irnpervo..sness.
CALCULATION OF A PEAK RUNOFF USING RATIONAL METHOD
Project Title:
Catchment ID:
Cureton Miskey Compressor Station (18177)
Basin EX -1A : Undeveloped Basin Tributary to Borrow Pit (100-yr)
I. Catchment Hydrologic Data
Catchment ID =
Area =
Percent Imperviousness =
NRCS Soil Type =
PR -1A
20.71
2.00
A
Acres
A, B C. or D
II. Rainfall Information I (inch/hr) = C1 * P1 /(C2 + Td)"C3
Design Storm Return Period, Tr =
C1 =
C2=
C3=
P1=
100
28.50
10.00
0.786
2.65
years (input return period for design storm)
(input the value of C1)
(input the value of C2)
(input the value of C3)
inches (input one -hr precipitation --see Sheet "Design Info")
III. Analysis of Flow Time (Time of Concentration) for a Catchment
Runoff Coefficient, C =
Overide Runoff Coefficient. C =
5-yr. Runoff Coefficient, C-5 =
Overide 5-yr. Runoff Coefficient. C =
0.22
0.00
(enter an overide C value if desired. or leave blank to accept calculated C.)
(enter an overide C-5 value if desired. or leave blank to accept calculated C-5.)
Illustration
LEGEND
O Beeming
Flow- Direction
Catchment
Botuu ary
NRCS Land
Type
Heavy
Meadow
Tillage/
Field
Short
Pasture/
Lawns
Nearly
Bare
Ground
Grassed
Swalesr
Waterways
Paved Areas &
Shallow Paved Swales
(Sheet Flow)
Conveyance
2.5
5
7
10
15
20
Calculations.
Reach
ID
Overland
1
Slope
S
ft/ft
input
0.0141
0.0141
Length
L
ft
input
500
5-yr
Runoff
Coeff
C-5
output
0.00
1,705
2
3
4
5
Sum
2,205
IV. Peak Runoff Prediction
Rainfall Intensity at Computed Tc. I =
Rainfall Intensity at User -Defined Tc. I =
Basin EX -1 - 100-yr.xds. Tc and PeakQ
2.06 inch/hr
2.06 inch/hr
NRCS
Convey-
ance
input
5.00
Peak Flowrate. Op =
Peak Flowrate, Qp =
9.28
0.59
Computed Tc =
Regional Tc =
User -Entered Tc =
Flow
Time
Tf
minutes
output
47.86
22.25
87.51
9.28
cfs
cfs
10/18/2018. 9:54 PM
E-2
CALCULATION OF A PEAK RUNOFF USING RATIONAL METHOD
Project Title:
Catchment ID:
Cureton Miskey Compressor Station (18177)
Basin PR -1 : Developed Basin Tributary to Pond (100-yr)
I. Catchment Hydrologic Data
Catchment ID =
Area =
Percent Imperviousness =
NRCS Soil Type =
PR -1
20.71
41.46
A
Acres
ABCorD
II. Rainfall Information I (inch/hr) = C1 * P1 /(C2 + Td)^C3
Design Storm Return Period, Tr =
C1 =
C2=
C3=
P1=
100
28.50
10.00
0.786
2.65
years (input return period for design storm)
(input the value of C1)
(input the value of C2)
(input the value of C3)
inches (input one -hr precipitation --see Sheet "Design Info")
III. Analysis of Flow Time (Time of Concentration) for a Catchment
Runoff Coefficient. C =
Ovende Runoff Coefficient. C =
5-yr. Runoff Coefficient, C-5 =
Overide 5-yr. Runoff Coefficient, C =
0.41
0.25
(enter an overide C value if desired, or leave blank to accept calculated C.)
(enter an overide C-5 value if desired. or leave blank to accept calculated C-5.)
Illustration
overland
Reach 1 flow
Reach 2 ,-
LEGEND
O Begimwtg
Flow Direction
4 -
Catchment
Benniary
NRCS Land
Type
Heavy
Meadow
Tillage/
Field
Short
Pasture/
Lawns
Nearly
Bare
Ground
Grassed
Swales/
Waterways
Paved Areas &
Shallow Paved Swales
(Sheet Flow)
Conveyance 1
2 5
5
7 I�
T 10
15
20
Calculations.
Reach
ID
Overland
1
2
3
4
c
Slope
S
ft/ft
input
Length
L
ft
input
500
5-yr
Runoff
Coeff
C-5
output
NRCS
Convey-
ance
input
N/A
Flow
Velocity
V
fps
output
Flow
Time
Tf
minutes
output
0.0141
0.25
0.27
30.52
0.0141
1,705
Sum
2 205
L
IV. Peak Runoff Prediction
Rainfall Intensity at Computed Tc. I =
Rainfall Intensity at User -Defined Tc. I =
Basin PR -1 - 100-yr.4s. Tc and PeakQ
2.23 inch/hr
2.23 inch/hr
5.00
0.59
47.86
Computed Tc =
Regional Tc =
User -Entered Tc =
78.38
22.25
78.38
Peak Flowrate. Qp = 19.06 cfs
Peak Flowrate. Qp = 19.06 cfs
10/18/2018. 8:27 PM
E-3
CALCULATION OF A PEAK RUNOFF USING RATIONAL METHOD
Project Title:
Catchment ID:
Cureton Miskey Compressor Station (18177)
Basin PR -1A : Undeveloped Basin Tributary to Culvert 1 (100-yr)
I. Catchment Hydrologic Data
Catchment ID =
Area =
Percent Imperviousness =
NRCS Soil Type =
PR -1A
7.00
2.00
A
Acres
A. B. C or D
II. Rainfall Information I (inch/hr) = C1 * P1 /(C2 + Td)AC3
Design Storm Return Period, Tr =
C1 =
C2=
C3=
P1=
100
28.50
10.00
0.786
2.65
years (input return period for design storm)
(input the value of C1)
(input the value of C2)
(input the value of C3)
inches (input one -hr precipitation --see Sheet "Design Info")
III. Analysis of Flow Time (Time of Concentration) for a Catchment
Runoff Coefficient. C =
Ovende Runoff Coefficient. C =
5-yr. Runoff Coefficient, C-5 =
Overide 5-yr. Runoff Coefficient. C =
0.22
0.00
(enter an overide C value if desired, or leave blank to accept calculated C. )
(enter an overide C-5 value if desired, or leave blank to accept calculated C-5.)
II I ustrati on
LEGEND
O Bing
Fin Direction.
E
Catchment
Boundary
NRCS Land
Type
Heavy
Meadow
Tillage/
Field
Short
Pasture/
Lawns
Nearly
Bare
Ground
Grassed
Swalesi
Waterways
Paved Areas &
Shallow Paved Swales
(Sheet Flow)
2.5
5
Conveyance
7
10
15
20
Calculations
Reach
ID
Overland
Slope
S
ft/ft
input
Length
L
ft
input
500
5-yr
Runoff
Coeff
C-5
output
0.0141
0.00
NRCS
Convey-
ance
input
N/A
Flow
Velocity
V
fps
output
Flow
Time
Tf
minutes
output
1
0.0141
200
2
3
4
5
Sum
700
IV. Peak Runoff Prediction
Rainfall Intensity at Computed Tc. I = 3.23 inch/hr
Rainfall Intensity at User -Defined Tc. I = 6.23 inch/hr
Basin PR -1A - 100-yr.4s. Tc and PeakQ
5.00
0.21
39.65
0.59
5.61
Computed Tc =
Regional Tc =
User -Entered Tc =
Peak Flowrate, Qp =
Peak Flowrate, Qp =
45.26
13.89
13.89
4.90
9.48
cfs
cfs
10/18/2018, 8:25 PM
E-4
DESIGN POND VOLUMES
100-yr Runoff Volume
From FAA Worksheet —
V1oo = 219, 209 cf
Required Storage Volume for retention ponds is 1.5 -times to 100 -year runoff volume.
Required Storage Volume
Vrequired = 328, 814 cf
Vrequired = 7.55 acre — ft
DETENTION VOLUME BY THE MODIFIED FAA METHOD
Project: Cureton Miskey Compressor Station
Basin ID. Stormwater Retention Facility: 100 -year 24 -hour Storm Runoff Volume
(For catchments less than 160 acres only. For larger catchments. use hydrograph routing method)
(NOTE: for catchments larger than 90 acres CUHP hydrograph and routing are recommended)
Determination of MINOR Detention Volume Using Modified FAA Method
Determination of MAJOR Detention Volume Using Modified FAA Method
Desian Information (Urumqi
Design Information OnoutE
Catchment Drainage In,psr.,ouSness
I, =
41.46
percent
.t.^-.er: •,•a -!age tmperoousness
I, = 41 46 percent
Catchment Drainage Area A =
20.710
acres
'_ atchment Drainage Area A = 20.710 acres
Predevelopment NRCS Soil Group type =
A
A B. C or D
°redevelopment h82CS Soil Group Type =
A
A B C or D
Return Penod for Detention Control T =
10
years i2 5 10 25 50 or 100,
Return Period for Detention Control T =1
100 lyears
12 5 10 25 50 or 100
Tame of Cone entraaon of Watersrlea tc =
78
rnmutes
' me of toncentraeon of Watershed Tc =
78
rnnutes
Allowable Unit Release Rate q =
0.00
ctslacre
alowable unit Release Rate q = !
0.00
dwacre
One -hour Precipitation P.=
2 7
inches
One -hour Precipitation pi =I
4.65
inches
Design !Uinta IDF Formula I is C,' P,(C,+T J"Cr
Design Rainfall IDF Formula I = C. P,/1C;4.7:1=C I
Coefficient One C =
28.50
Coefficient One C. =
28 50
Coefficient Two C, =
10
Coefficient Two C; =
10
Coefficient Three C. =
0.789
Coefficient Three C. =
3 789
Determination of Average Outflow from the Basin (Calculated!.
Determination of Average Outflow from the Basin (Calculated).
Runoff Coefficient C =
0 J+
Runoff Coefficient C '
0 41
Inflow Peak Runoff Qp-in =
14 '6
its
irtlow Peak Rinoff
Alowable Peak Outflow Rate 0P -out =
0.00
cis
19owaWe Peak Outflow Rate Op -our =
0.00
cfs
Mod. FAA Minot Storage Volume a
94 737
cubic feet
Mod. FAA Major Storage Volume a
219 205
cubic feet
Mod. FAA Minor Storage Volume =
2.267
acre -ft
Mod. FAA Major Storage Volume =
6.032
acre -ft
5
<- Enter Rainfall Caxton Incremental Increase Value Here .e g 5 for 5-Mmutesl
Rainfall
Randal
Inflow
Adjustment
Average
Outflow
Storage
Randal
Rama/
Inflow
Adjustment
Average
Outflow
Storage
Duration
Intensity
Volume
Factor
Outflow
Volume
Volume
Dvaion
Intensity
Volume
Factor
Outflow
Volume
Volume
minutes
inches /N
ale -feet
acre-feet
acre
mnutee
inches 1hr
acre -feel
cfs
acre4eet
acre-fee,
oiput)
u
iouputj
)output!
�',fmn"
(oirlputj
n�Ms
tou4uel
Catgut)
-fee!
ioutputi
inpu:l
(output)
(output)
e.�'Im'
JoAtNA)
(output)
��l
%output
(output
0
0.00
0.000 0.00
300 0.000
0 000
0 0.00
0.000 0.00
0 00
0.000 0.000
5
9.32
0 412
1.00
0 00 0.000
0.412
5 15.64
0 915 t 00
0.00
0900 0.915
10
7.43 0.657
1.00 0 00 0.000
0.657
10 12.47
1458
1 00
0.00
0 000 1.458
15 6.23 0 825 1 00 0 00 0.000
0.826
15 10 45
1 834
1 00 0 00
D ON 1 834
20 5 39 0 954 1.00 0 00 0 000
0 954
20
9.05
2 118 t 00 0.00
0.000
2 115
25
4.78
1056 1 OD 0.00 0 000
1.056
25
8.02
2.344
1.00 0.00
0.000
2.344
30
4.30
1140 1 00 0.00 0 000
1.140
30 7.22
2.532
t 130
0 00
0.000 2 532
35
3.92 1 212 1.00 000 0 000
1 212
35 6.58
2.692 1.00
0.00
0.000 2.692
40
360 1275 1.00 000
0.000
1 275
40
6.05
2.831 100 0.00
0_000
2.831
45
3.34 1.330 1.00 0.00
0.000
t 330
45
5.61
2 954 1.00 0.00
0.000
2.954
50
3.12
1.380 1.00 0.00
0.000
1 380
50
5.24
3.064 1.00 0.00
0.000 3 054
55
2.93
1.425 1.00 3.00 0.000
1425
55
4.92
3164 1.00 000 0000
3154
60
2 75 1 467
1.00 0.00 0.000
1 467
50 4.64
3.256
100 0 00
0.000
3 256
65 2.62 1.505
1.00 0.00 0.000
1 505
65 4.39
3.341
1.00 0.00
0.000 3.341
70 2 49 1.540
100 000 0.000
1 540
'0 4 18
3.419
1.00
0.00
0.000 3 419
75 2 37 1 573 1.00 0.00 0.000
1 573
75 3.98
3 492
1.00
0 00
0.000 3 492
80 2.27 1 604
0.99 0.00 0 000
1.604
80 3.81
3.561
099
0 00
0.000
3 561
95 2.17 1 633
0.96
0 00 0.000
1 633
85 3.65
3.625 098 0.00
0.000
3.625
90 2.09 1.560
0 94
0 00 0 000
1 660
90 3.50
3.886 0 94 0 00
0 300 3.686
95 201
1.688
091 000 0000
7.886
95 337
3744 091 0.00
0000 3'41
100 1 93
tilt
0.89 0.00 0 000
1.711
100
3 25
3 '99 0 89 0.00
0.000 3 '99
105 1.87 1 735
0.87 0.00 0.000
1.735
105
3.14
3.851
0.82
0.00
0.000
3,851
110
1,81
1 757
0 86
000 0.000
1 757
110 3.03
3.902
0.66
0 00
0 000
3 902
115
1 75
1 779
0 84
0 00 0.000
1.779
115 2.94
3 950
0.54 0.00
0.000 3 950
120 1.70
1.800
0.83 0 00
0.000
1 800
120 2.85
3.996
0.83 0.00
0.000 3.996
125 165
1.820
0 81 0.00
0.000
1 820
125 2 76
4.040
0.81 0.00
0.000
4 040
130 1 60 1 539
0 80 0.00
0.000
1 839
130 2 69
4.083
0.80
0 00
0.000
4 083
t 35 156 1 858
0 79 0.00 0.000
1.858
135 2.61
4 124
0 79
0 00
0.000 4 124
140 1.51 1.876
0.78
0.00 0.000 i
1.876
140
2.54
4 164
0 78
0.00
0.000
4 164
145 1 48
1.893
0 77
0.00 0.000
1.893
145
218
4 203 0.77
0 00
0.000
4 203
150
1 44
1.910 0.76
0.00 0 000
1 910
150 2.42 4.240 0 76
0.00
0.000
4.240
155
1 41
1.926 0,75 0 00 0 000
1.926
155 2.36
4.276
0.75 0.00
0 000 4 276
160 1.37 1.942 0,74 0.00 0.000
1.942
160 2.30
4.311
0.74 0.00
0.000 4.311
165 1 34 1.957 074 0 00 0.000
1.957
165 2.25
4 346
074 0.00
0.000 4 346
170
1 31 1.972
0.73 0.00 0.000
1 972
170 2.20
4 379 0 73 0.00
0.000 4.379
175
1 28 1.967
0 72 0 00 0 000
1 987
175
2.18
411 1 0.72 0.00
0 000 4 411
180 126 2.001 0.72 0.00 0 000
2.001
130
2.11
4 443 0.72 0.00
0.000 4 443
185 1.23 2.015 0 71 0 00 0.000
2.015
185 2.07
4 Cl 0.71
0.00
0.000
4.474
190 1 21 2.028
0.71 0 00 0 000
2 028
+40 2.03
4.504 0.71
0 00
0.000
4.504
195 1,18 2.042
➢.70 0.00 0 000
2 042
195 1.99
4 533 0.70
0.00
0.000 4.533
200 1.16 2.055
0.70 0.00 0.000
2.055
200 1.95
4.562 0.70
0.00
0.000 4.562
205 1 I4 2 067
0.69 0 00 0 000
2.057
205 1.91 4.590
0 69 000 0.000 4.590
210 1 12 2.080 0.69 0.00 0 000
2.080
210 1.88
4 61'
0 69 0.00
0 000 4.61 7
215 1 10 2.092 0.68 0.00 0 000
2.092
215 1.85
4 644 0.68 0.00
0.000 4.644
220 1.08 2.104 0.68 0.00 0 000
2 104
220 1.52
4.670 0.68 0 00
0.000 4.670
225 106 2 115 0.67
0.00 0.000
2 115
225 1.78
4.696 0.67 0.00
0 000 4,696
230 1.05
2 127 0.67
0 00 0.000
2 127
230
1.76
4 721 0 67 0.00
0.000 4 721
235 103
2138 0.67
0.00
0.000
2138
235
1.73
4.746 067 0.00
0.000 4.746
240 1 01 2.149 0.66
0.00
0 000
2 149
240
1.70
4.770 066 0 00
0.000 4 770
245 1 00 7 159 0.66 0 00 0 000
2 159
245 1.67 4 794 068 0.00
0.000 4 794
250 0.98 2 170 0.66 0 00 0.000
2 170
250 1.65
4.818 0.66 0.00 0.000 4.818
255 0.97 2 180 0.65 0 00 0.000
2.180
255 1.62
4.841 0.65 0.00
0.000 4 841
260 0 95 2 191 0.65 0 00 0 000
2 191
260 1.60
4.864 0.65 0.00
0.000 4 864
265 0.94 2 201 0.65 0.00 0.000
2 201
265 1.58 4.586 0 65
0 00
0.000
4 886
270 0.93 2 2+0 0.65 0 00 0.000
2 210
270 1,55
4 906 0 65
0.00
0.000
4 908
275 0.91 2.220 0.64
0 00 0.000
2.220
275 1.53
4.929
0.64 0.00
0.000 4 929
290 0 90 2230 0.64
0 00 0.000
2.230
280 151
4 951
0.64 0 00
0.000 4 951
285 0.88 2 236 0 64 0 00 0.000
2.239
285 1 49 4.971 0 64 0 00
0.000 4.971
290 0.86 2.246 0.64 0 DO 0 000
2.248
290 1 47
4 992 0.64 0.00 0.000 4.992
295 0 87 2.258 0.63 0 00 0.000
2 258
295 1 45
5.012 0.63 0.00 0.000 5.012
300 0 85 2.267 0 53 0.00 0.000
2 267
300 143 5.032 0 63 0 00 0.000 5 032
Mod. FAA Minor Storage Volume (cubic ft) = 98.731 Mod. FAA Major Storage Volume (cubic R) =
Mod. FAA Minor Storage Volume lac re -n.) = 2.2666 Mod FAA Major Storage Volume (acre -MI =
UDFCD DETENTION BASIN VOLUME ESTIMATING WORKBOOK Version 2.35. Released January 2015
219,205
5.0322
Cureton Mickey CS - UD-Oetenbon_v2 35 'FAA I xis Modified FAA
F-3
'071812018 930PM
DETENTION VOLUME BY THE MODIFIED FAA METHOD
Project: Cureton Miskey Compressor Station
Basin ID Stormwater Retention Facility: 100 -year 24 -hour Storm Runoff Volume
Inflow and Outflow Volumes vs. Rainfall Duration
Volume (acre-teet)
0
50 100
150 _)0
Duration (Minutes)
3O)
W.a Yam MUo. VAWA Nino 61am 0y ebb Vol...
o Mince Yemllarp Veen —emu . . A. ... Va.A
UDFCD DETENTION BASIN VOLUME ESTIMATING WORKBOOK Version 2.35 Released January 2015
Cureton Miskey CS - UD-Oetenton v2 35 tFMI rk. Mod fled FM
10/15/2018 9 30 PM
F-4
Cureton Miskey Compressor Station - Retention Pond Stage -Storage
Calculation By: M Cloud
Date: 10/18/2018
Contour
Elevation
Contour
Area
Depth
Incremental
Volume Avg. End
Cumulative Volume
Avg. End.
ft
ft1
ft
ft'
ft-
4792.60
0.00
0.00
0.0000
0.0000
4792.70
1494.13
0.10
74.7065
74.7065
4792.80
4003.55
0.10
274.8840
349 5905
4792.90
5953.84
0.10
497.8695
847.4600
4793.00
8155.55
0.10
705.4695
1552.9295
4793.10
10382.01
0.10
926.8780
2479.8075
4793.20
13152.67
0.10
1176.7340
3656.5415
4793.30
16184.76
0.10
1466.8715
5123.4130
4793.40
19693.23
0.10
1793.8995
6917.3125
4793.50
24066.76
0.10
2187.9995
9105.3120
4793.60
33975.88
0.10
2902.1320
12007 4440
4793.70
42001.01
0.10
3798.8445
15806.2885
4793.80
49635 34
0.10
4581.8175
20388 1060
4793.90
57816.16
010
5372.5750
25760.6810
4794.00
68007 72
0.10
6291.1940
32051.8750
4794.10
85584.29
0.10
7679.6005
39731.4755
4794.20
94705.9
0.10
9014.5095
48745.9850
4794.30
104682.97
0.10
9969.4435
58715 4285
4794.40
114683.22
0.10
10968.3095
69683.7380
4794.50
12211166
0.10
11839 7440
81523 4820
4794.60
128703.9
0.10
12540.7780
94064.2600
4794.70
134816.77
0.10
13176,0335
107240.2935
4794.80
140352.27
0.10
13758.4520
120998.7455
4794 90
145345.64
0.10
14284.8955
135283.6410
4795.00
149,695.65
0.10
14752.0645
150035.7055
4795.10
153,575.61
0.10
15163.5630
165199.2685
4795.20
157,142.05
0.10
15535.8830
180735.1515
4795.30
160,572.76
0.10
15885.7405
196620.8920
4795.40
163,894.92
0.10
16223.3840
212844.2760
4795.50
167,076.54
0.10
16548.5730
229392.8490
4795.60
170,122.23
0.10
16859.9385
246252.7875
4795.70
172,896.41
0.10
17150.9320
263403.7195
4795.80
175,509.58
0.10
17420.2995
280824.0190
4795.90
177,918.27
0.10
17671.3925
298495.4115
4796.00
180,033.48
0.10
17897.5875
316392.9990
4796.10
182,022.48
0.10
18102.7980
334495.7970
4796.20
183,876.32
0.10
18294.9400
352790.7370
4796.30
185,641.92
0.10
18475.9120
371266.6490
4796.40
187,308.28
0.10
18647.5100
389914.1590
4796.50
188,900.06
0.10
18810.4170
408724.5760
4796.60
190,428.22
0.10
18966.4140
427690 9900
4796 70
191,941.26
0.10
19118.4740
446809 4640
4796.80
193,402.29
0.10
19267.1775
466076.6415
4796.90
194,828.80
0.10
19411.5545
485488.1960
4797.00
196,226 20
0.10
19552.7500
505040.9460
variable user input
Note: The user inputs the measured contour area for each contour elevation
interval as mesured from the design pond.
AB+AT V=d
2
where:
V = incremental Average End -Area Volume (ft')
AR= contour area at bottom of depth increment MI)
A, = contour area at top of depth increment (ft')
d = incremental depth (ft)
Worksheet for Emergency Spillway
Project Description
Solve For
Input Data
Discharge
Crest Elevation
Tailwater Elevation
Weir Coefficient
Crest Length
Results
Headwater Elevation
Headwater Height Above Crest
Tailwater Height Above Crest
Equal Side Slopes
Flow Area
Velocity
Wetted Perimeter
Top Width
Headwater Elevation
19.06 ft3/s
4796.00 ft
4790.00 ft
3.67 US
30.00 ft
4796.31 ft
0.31 ft
-6.00 ft
0.25 ft/ft (HIV)
9.34 ft2
2.04 ft/s
30.64 ft
30.16 ft
Bentley Systems, Inc. Haestad Methods SofittiWe9iftwMaster V8i (SELECTseries 1) [08.11.01.03)
10/18/2018 8:52:20 PM 27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page 1 of 1
H-2
Culvert Report
Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc.
CULVERT 1 - 100 YEAR
Invert Elev Dn (ft)
Pipe Length (ft)
Slope (%)
Invert Elev Up (ft)
Rise (in)
Shape
Span (in)
No. Barrels
n -Value
Culvert Type
Culvert Entrance
Coeff. K,M,c,Y,k
Embankment
Top Elevation (ft)
Top Width (ft)
Crest Width (ft)
4 S
as
All 14
4806.79
69.85
= 0.50
= 4807.14
18.0
Circular
18.0
1
0.012
Circular Pipe
Beveled Ring Entrance
45D bevels
= 0.0018. 2.5. 0.03. 0.74. 0.2
= 4810.25
= 20.00
= 200.00
MI M1 ens
Calculations
Qmin (cfs)
Qmax (cfs)
Tailwater Elev (ft)
Highlighted
Qtotal (cfs)
Qpipe (cfs)
Qovertop (cfs)
Veloc Dn (ft/s)
Veloc Up (ft/s)
HGL Dn (ft)
HGL Up (ft)
Hw Elev (ft)
Hw/D (ft)
Flow Regime
Thursday, Oct 18 2018
= 0.00
= 9.48
= (dc+D)/2
= 9.48
= 9.48
= 0.00
= 5.68
= 5.36
= 4808.13
= 4808.65
= 4809.11
= 1.31
= Inlet Control
Culvert Report
Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc.
TEMP CULVERT - 100 YEAR
Invert Elev Dn (ft)
Pipe Length (ft)
Slope (%)
Invert Elev Up (ft)
Rise (in)
Shape
Span (in)
No. Barrels
n -Value
Culvert Type
Culvert Entrance
Coeff. K, M, c, Y, k
Embankment
Top Elevation (ft)
Top Width (ft)
Crest Width (ft)
I- -
•Y}
0
MY In
-we
4794.19
38.95
= 0.18
= 4794.26
= 24.0
= Circular
= 24.0
1
0.012
Circular Pipe
Beveled Ring Entrance
45D bevels
0.0018. 2.5. 0.03, 0.74, 0.2
= 4797.58
= 20.00
= 200.00
rase
VW can en.
Calculations
Qmin (cfs)
Qmax (cfs)
Tailwater Elev (ft)
Highlighted
Qtotal (cfs)
Qpipe (cfs)
Qovertop (cfs)
Veloc Dn (ft/s)
Veloc Up (ft/s)
HGL Dn (ft)
HGL Up (ft)
Hw Elev (ft)
Hw/D (ft)
Flow Regime
Thursday, Oct 18 2018
= 0.00
= 19.06
= (dc+D)/2
19.06
19.06
= 0.00
6.44
6.07
4795.98
4796.27
4796.84
1.29
= Inlet Control
r
A
1
C
D
G
M
• __
-r.
�y 1-x,•,11 ,. .. ,- It'
_
{ �,r ryH1.•IM L•t / / �� - -fir ` \
KCAL Xf •
tr.ItLI r1/+• WI rflrl.l l
/ J
l r. - -
'� !
./.
——------.�f�.���..w......:--\-�--
-- - ��---1-- IC (nMl""i°Y�'tUfn,olr�•�
?.
ratXTVI.T.
'wT'w' — ` TWINS
• V
.I;
_ _.-I— -
W6L-Wnl I
i \ I
War AS 1100000 \ \ N. 1 \ 1
1
/ e
•
.lr._
..—_
— —
ILlr\\•
I
v
— •— •—r•
1
N
•
KfA,tr•r 1011.
r u0 .a1
e WY P
...M.' Y t
I1
II�
r
I
• 1»11)0.90
II 1»:Mint
1\ IY.SII W1
` •1101:: M
Jl vu-, t Oil ilia 11
n a N I
I 00141(41
•.rWl•I. %4 MCY/MIrM(M 0.01
•Y __'_/ICCCppC{{{\•lnMIOu
_ 1 •'TII034 x11111.0.01.. L •,AIn.}Y nO Olrtn
�a i 11.0140.01-
(I is Mlntl t \ t 01)011 SO • -Nil UY •� IW( IMM'-'� •-
((0(r It Adis I LT) . Lt,. J — — / •- — `
1 \ K. YU 90 ./ / �� ! - -- ` '
10.
1-�'
It I
IL lc$aWen IL'�(II
q�1r `
= — "-
\
' +
i
—'\\ }{. / I
J/ ' lr
I
\
\
\
\ \ ,
\
\ \ I
\ \ \ `
1
.
NVP1I'W .,I
I.
K aItuaS.W
• IJf)Y10.90
I 1»,A1 ..
it 4•11.2.
I \
1
`
I I
,
•nlltYl
-
YfYD`I+,
Mtnrlgm
OTMKY0
(L a w
/yI�
! i•Ip40.40 TIMIr.OIw II
I u•unik`f1
I 1
1
t 1
I/
Mr
1 Kr
I
y.,�-
Y 114l1t1DM
E)bjHam
Li. saint
rAaa.
:Wla
N I».M0.1D
IrlVlnoo
I
� '-
r
4
O
I
1W0 KO
NllpOlSq
I)NWIIG90 /
n(KAM KU,
II -311005100
C 1lOl.wY
•
•�sr( KW
.a. ..MINIM!
-. I)+1NUM\\titNfr
fLI,
I
{
I I
1
l
/ IUW.IRlIlrO
airy—
IJ/ ' ImL111KIY _----
I r r(IWDatcM' alul lbnCgdl �. �� ,11,1
�71Ire-
oI alit n .121f...1.440.6:
OI M 1/
V! I ('t / / / I1
II //•
r
{ { I •I 1
/
Ur
11 f//
I 1 1 / /
! i'
-
/
.I
1wIsill!
t�
1
- jI
II
/ I
'
�I
rII
IIII
I
I
IIOVY
.
0tA,00WW
•
ti
I»RA
0M4P
141
I/
,'` \
( I�` I /
•
\ tii
1
• ..
��
4-
1
JCL
J
/, i t ill
;I I 1
• `
\
II rAtlt1fl 60.0
a .n162oo
•
(
\
1
..21)..ZO
0
I
I I
a
NOV •C 101(
• KIJK
'. YSIIYLOI
ft Y0►.rUluu*At
/
../
III
II I l+
1
IIII
•1 / i
I I
LW OFF *Ali -
J IY.(OO•p IN .DMI MAW IIII•
l / I I
/ '
I ill
/
'l
I
\ 1 e MU It
\ \ 1 N.
N.
\ (( \ \ \• \
,
I
\
\
N.
` `
\i.
1
—
I
/
N IACitln.ow
•IDs V 1
/
/
\
k
I
' 6K •
{ I , 1.. attar° Ama I UUDC Of SPIL4 lf* M I
{ I ` ---
III
I t)S,Ill5 MTI%IIa• IA14. ::1 • . I w t I' Recto III,
I + \ (10 ••••••16 uYMS,tAylt•I top n - •A 30 IIII
i
I ` t '
/
1
I1
DP
I
1
III ` I 1 I I
r
\ I 1
\
I
+
1 1 + I
\
r
nIKA,"tOA4\
• L»r.,SDO
n 4.. 0.11
j
�•r, INIVIV *WO
. ,n II r$00
I K.Y..a
®i
1
\ •'(
- \
nom.tOY.
\ 1»190460
u2•)••90I•YIM `
• 1
11
+
I
\
111 II / 1
11 11{ \ MtaW,WI. 1I
+ I ` - Y ITV)I.r 1
\ (ti Wi ,^
j I RAG I. ,LWA,
0 51•0•11/17
fYYpin
i )
, •• ••..,Y
)
, I ,
t
I
\
I--
_\
di '
11 I
\\
1+111`
•
(Ih$\
\ %�
MOM.. a . •
I
aw
, -_
,
\
till' uDMM, rAD ' ^
I
`•�_
•
\ - I + "M ItIIN A.1"
\
N. `� _- 1 1
N.
.
I
/
/--=
/
1
1
II
Y
•
rV.
I»t4Y 10../.........H
_
_
-� CY.N
` �` _� �/'•I IMIY►•SM
1 ��
\_�—_---'--`-—i - n (LUMKiArr �r c. n .n+�.06
_J -- / —�''CURVlTAlLE
Yf,
/
I 1
\
\ •. ` _ -n1
,
_ —
\
/
,
\
_ `�..
r 1 v
__\
_ 1- -
1...‘\\‘‘—
CI
6060
6000•
.If
-.•
�� - 1
---�'_--...-
t
\7_•
J
-
\
/ I 1
C)
6000
9000•
rp
I1
•
r « a •rte +
\1
Mr M.�IrM t�r -i—Mr
}
sa rt 'f\•.
I I 111
C1
6060
6000•
MM
--�fM-erf6.TArI
M -- r.,. 1•
I/ \
'
(WM(r�
~ -
III.
I
G
60x
9000•
MM
/ �vl]
I +) Nlym
1 /
/
` 1
I
t
*Cans SOU ♦/ 1 • „I�
I
a
6002
6000•
NM
1!\
I
3a y I ,` f•S It 41•64114 .
/ ', ♦ dINAk AROYIPIuI i ` tT
)
0000
900>
rM
NI•IO /
\•1 /
1 •I \
1
NOTES
.,N, ca .SIAIts rlaa$4, lift n O..AWYO TMCId
DAntM OAKUM WIND 411PRVIATIONS
a VMI(df11M[MM Wits R sIAIDNfIMI IO.•UUfl.a Mt IfUIRIM
i. 104110
f00W1YW
M{ sal 1114
101M1•I1 v...0 -'•1001
w RIM
..M•901Mp Mal OP rCTgNA 1NOM ..MIr 61 --' GIN 1.111•)1.1.
•1I6eW. WeDCtlWI•CQ014100
EMI Sill51*VI1 lOt 1•Y•161D(tTNA PWWOntW MNVIa(O A114 WA6.KUVIL
). ta111»II
•MCA0.GMIO JII11T160M C11riAK'IP D al• W. t W 10. Slat
r6R10MItWC T*CTI41101t (oIatJ tMI [[MK1.J(1p. µ11M101 C.Wf90Y
0•M1UO6 IAIQU Dulolo. 1•(Mallaa 0l: .114141I11p.114M. si' .fM units
d DnT1MAMC( (111101 IMSMW. 11.•µ•I M1 (OM•ICII
�W_
('as .'-AN,
yriltl&a:_CI.1;1�.1w
1•µ11.O MAJOR !6010/• K q.tp(1.*IAnaT
M KSIfTP IMnt(1CtKYtt
— — _ rI 1WIIta 1INMMCT
(00)- — t.M111Y9 rUk011 (011tOS KIW tl1Wfd(.WAr
_
.
III
••ONl.SIIAL I*lI. MIML 0W W0•A00 LIMY PUS COOgINUIf 1TPIN flat
• runt 1 IWAL C IDM'.MI . VWMt,on sown -a LUY.C V IM1D. 14.1.0X-1100USµ,
u•N/I MAIINN. CIYTP NefO.N6 MU 0•TPMIr an CV wave. 10 U uY0
11 1M11NU1M
IIII$ rK10YD MAC. (atlas I. IlI W11P
— •-mama
111�I1IN�
woo.0N110CAN MIIIIOITN O.Tyt lel IW KMM I((TI
WAMir a foe fill MI1CK WW r 0010 III S. IK OVUM
riN-tIMPII
- -
^_ _
r M ON MOO
.6IIlC.•W1w ,MIN AIMYI(M ~ILK pAI4n lax
MM111b
MIIIII
LOW 100.1
r.(YOREO Mt•P [PTOJ•
:.W Wit (O RSTS P lea OW RAM UVI• Hap IQ <lIN11
rAIi tyYN
.•nMAfllrf. 0.01.1 SITS a ALL 004.48•4 MONO* W6Wa J11tt .4•TOOs :CAW.:CAW.IK
I u AL(Yd .DAM Wu YAM A MIJIIi W r (001 CSMI • SpAO I.St .Nµ14 OiU
!Xrtw.. I IOItI )1 T raa IDL.11p(at(Yt OID nna fag AS mAIK RCP W IMP W . tt
P (OMHM
I�'•�'
1
I
.
A IOOlM1I0
,J Ora r
I MOR111
_ - - - _ - tIDT3•MirWIw .OW w•Oj•I r�WO I1P•O401
•,»
ottl'A( MAT NOP•. CCt I•F c a riots K0root ris TO f.W9 x11'.1 P Valet,
•untlanavel*1
1• !—
{navel* Ulf rrCt IS II, M LL0 II I?Ateau TO ....0 CORUC TW1.M KT M116 as
PwI.O If1CONIC,. .CONIINA!WS CAM R MCTAttq Ante 60004tE 6dlaa110
- -}.. - ..11
•�Mi-•ter-I.. 6�M• --_-✓ - -
= ,•._:�
•
- llrM�V1•
�Iv - 1Yl• ,•,_,,1O,IP Nn4 L. ,LLMVP
LEASE tL%ADM r MS MOM wnICY On •I.11Mt
00 cut WI Ku $44:011 MI Y I• MSS •07M OTIO.00 0x1 al ( OU1.l.IW
AAOI OotNAOde 10.0UW ARE TO 111 P Raise SPIKI.O KM µNOM OMOI
rLIWTIPS SWllallY.IOM tl1A0W.. AT14.'I.d. N. OIMI EtEVATUONO N•OWM
C'D.Rltr
I) MMPIM2 OYAMMOMara•101 IOA'J1( KM 600 Plat Ili. !Mara M{ PO((111.10.1 I'CDCIT GI61M.DAp
t'ONIS SUUKIrW CUMIMO S WW1tC rW MiD NOIK MMCSC(.O I IP MO r 011ROC UD Waa LOMPC?l6lat.Nl4600
fla:PlKf4[LD Wyt «MMYCfIp y.A1•E1A(0
ICALCIRLF SlAT lato
Ito FIRI MOM vIITICALCWNKIVAIIJN
601 ENO van
SFC%Id. uw CKY (MIVMT IL MINE (ICVMINM.
WTU'KOW'LIY• MI r11MldlfmMW NG
M`y
.(t lAltL 040 0. IN (Carat]ID 10 A •NNYUW Cr M COIN' •!AWARD WeCIP
ia/411GOElat
IMI,a• 110571P 1(1.41- • u1•TN (IT.KK1 It MTh ant KIT r11•I d LaOl.
t In TtIDIST• "Corot OILK. MOISIu4 CUMIN! N.M DM wt. TO
Ti* 16 I •ILIIr.. LMA'a
" ti 0.0.0 ULM
.voKCT OOTWOUCAS I.NUO0ATIP Mt AaM1104M5 IMrOYMTIP AS0 WI Walt
A TYPICAL SECTION - 20' FACILITY ROAD +I.-.�,
I4MRWIYNTL
_
Nt•, IU.) • f0
O
-.•••••••�•••^•••••••••••••
---------
te" "T��
-..`.w:...
'�
_
_
-- L . NI
--•
(UIU ION KIDS I VIAM IuRgoN
®miernamMI%KEY
.... ICINI SIURG. CO
-
ti1.c
AW(C•T mom.
.. _ Y CLOW
10111111010
COMP*t%SOR SIAMI0N
60MMSC7D COM{'Nf fSUR SIA tIUN
CIVIt
Ci[NENAt
GRAVING PINE
18177
..... r Cage
LOWYPM
NW
ate•
•
Ii1OO la art
MIMI
WC
- - Y M(rA
IOIIY90u
®
Samuel Engineering
W...,.,..•. I,«.1.1.1.1..
........
..........• s'.
...__-�
t
fI
1'
I
_
•. •. •
Q
II
!I
I
_
-
MKCS-CE-601
A
RIE rtIltNCt DRAWINGS
II (WI S IONS
RSVISI0NS
^4-
.w. ...-. fa ...we p •$4
WN_.v.. LO Eli
1
J-2
3
u. -
f
A
i
r- - —
N.
B
C
saanaglanalta-
0
I
- >_ _�-.mil —>•s
...N._ . __ - -r—
`•
•
JI _
•
•
N
N
N
•
•
•
•
•
•
ItASIN 1
ale
N
N
-.t
"1a ...........
•
•
DRAINAGE BASIN SUMMARY
w t1a
I.(yCw .4-N1
OpGy-Mly
COO 1lIr11I,G AREA
:WIWI1
..100.OOIC SO:.
COW. (ITV.:
D.flNVtg6alit.a
,..)
..WI. 140tweeO0
-MP* MI
GASP. ILow twee
.,.
IM. rN MINOT.
COII/M1C11
(..
tttnailfN D
MOW OATS (CIS)
4.
I.
I/ -I
t MILK. WON SW* 01WMNO•O GONNA. NTT
TO Is
.
IOC
net a
I41
./l
.,a
P..
Y 1
MIL. OMANIO0 TO tt1NOTTO% dWN .NL..004:
WW&ORD Ala AK• .4fOosa MAIM
•
•1O11.V.M.
••-
iAlat!_
I ..
(
—
it
F
-
it
I
I
XAt . -1W
I
I
NOTES
M
1 IM( muse COAPORSAM IVATN1N •NOPOT4O Mit It tG(ATFL COI* writ. IY(1 y taw
M10.0 PART Cr HCN{It :O IONINy4P : MIr IM aaNOI O1 Mqt, IIn 0M1DIM
M.O COATI (SOIAW
1M HIC `JIM/C. Kill NM NOIKI sae ft(pMf4 Oft* yl.`H. CL MD *M (C(1MD ON
OAI Vl0a
.00LWCtAMCYIDw ($40 ON COD. M,o %I Alt TWO CODR4MIff Niels fall VOW.
AM.YAI.Nall/al... CMIte. MI OA %AtHI nil
HMHa Ca!IM at. AMCYM Motu Y tau.. t
S1O 0g1C toll aloe of II.MINI ION la POOI. VWN .A atm tf4yCN•Cf (ayNMWllNla
tWN(C *11 SOIL buoy( f
TWITOL 014a at ..W. JU1O IMP Vt. lw Itw PAW%
LEGEND
- 'opt
70
MSG A
NORTH
NNs. w at\ below.
Ca balm you elq
MRCS WEB SOIL SURVEY DATA
.AI
JVt
SV'.Na
MAP SC[. WM
nit*.001[
[Oh CAOA
PAI MG
at
\Ilft MO WO. IOM f0N To. ,...Dt11
t
w
06GOOO WO (0- to IAOMSI
a
For Information Only
,.t FOl Conc.
EY I alas an
Itm .M AA a .
•wa awl —
_.aasn.»
oat aaan•
n alma.
- aww
Asa a•le el
r —'SS.. a&
A
It I I N t\. I 0 ti n 4 •...
T
A •®4.1t0 OaAtNMI.
I' • 100
. CWUO
a PYAtla
. C1OOO IdIVID.-
10.0I•/IN MIC
w NONall WWNu.
CUNI PUN MIUSINfAM ® l II/IT
Al INfst11N1li. CO
MIUSTRfS4
Samuel Engineering
_ w •mow.. P.a AO I►* rL f I..w
iINIr. WIG. pia
'IIL!
**Lilt Cl MAIM
MISKI Y I'TIMPRIi5OR SIAII0N
4OMMYt IU t 0MPNtb.S0N %MIION
CIVIL
IIMAINAIA IIASIN MAP
18177
MK( .S ( 1--611) A
C
O
1
J-3
F I
c
I
2
3
4
DRAINAGE REPORT REVIEW CHECKLIST
Project Name: USR18-0115 Miskey Compressor Station
The purpose of this checklist is to provide the applicant's Engineer a basic list of items that County Staff will review
in regards to a drainage report. The drainage design shall meet the requirements of the Weld County Code and
commonly accepted engineering practices and methodologies.
A detention pond design (or other stormwater mitigation design) is appropriate for projects which have a potential to
adversely affect downstream neighbors and public rights -of -way from changes in stormwater runoff as a result of
the development project. The design engineers role is to ensure adjacent property owners are not adversely affected
by stormwater runoff created by development of the applicants property.
REPORT (0 = complete, O = required)
• Stamped by PE. scanned electronic PDF acceptable
® Certification of Compliance
❑Variance request. if applicable See Number 1 Below
Z Description/Scope of Work
ZNumber of acres for the site
ZMethodologies used for drainage report & analysis
Design Parameters
Z Design storm
al -ease -rate
URBANIZING or NON -URBANIZING
ZOverall post construction site imperviousness
ZSoils types
(]Discuss how the offsite drainage is being routed
( Conclusion statement must also include the following.
Indicate that the historical flow patterns and run-off amounts will be maintained in such a manner that
it will reasonably preserve the natural character of the area and prevent property damage of the type
generally attributed to run-off rate and velocity increases. diversions concentration and/or unplanned
ponding of storm run-off for the 100 -year storm.
xHow the project impacts are mitigated.
Construction Drawings
CC Drawings stamped by PE, (scanned electronic PDF preferred)
Drainage facilities
JOutlet details
'-?Spillway
Maintenance Plan
ZFrequency of onsite inspections
X
Repairs, if needed
ZCleaning of sediment and debris from drainage facilities
Vegetation maintenance
__Include manufacturer maintenance specifications. if applicable
Comments:
1 If the board approves the case. I will have Mr. Dunker sign the variance request.
2 The retention volume that is calculated exceeds the amount that would be required — The worksheet that is used
is made for the 1 hour P1 and the time used is the 300 minute time. Understanding that the pond exists already
on site, the applicant may use a different method to calculate the required volume to allow for future expansions
on site if desired. Public works used the simplified equation area*C*rainfall to obtain a significantly smaller
volume than the UD-Detention worksheet. If you have any questions, please feel free to contact Public Works.
3. Page 4 of 6 — remove reference to outlet structure. Appendix H — titled 'Detention Basin Outlet Structure Design'
4/11/2018
Department of Public Works' Development Review
1111 H Street, Greeley. CO 80631 I Ph: 970-400-3750 I Fax: 970-304-6497
w w.weldgov com/departments/public_works/development_reviewi
DRAINAGE REPORT REVIEW CHECKLIST
4. Off -site flows — Are they routed around the pond or sent to the pond? If they are sent to the pond, they should
be included in the spillway calculations.
5. Label Culvert 1 in the drawings
6. Once the revised design and drainage report have been submitted, the County may provide additional comments
in addition to the ones listed above. Depending on the complexity of the changes made, a full 28 -day review
period may be required.
7. Please provide a written response on how the above comments have been addressed when resubmitting the
drainage report. Thank -you.
4/11/2018
reid County
Department of Public Worksl Development Review
1111 H Street, Greeley, CO 80631 I Ph: 970-400-3750 I Fax: 970-304-6497
www.weldgov.com/departments/public_works/development_review/
Miskey Compressor Station
Noise Modeling Report
Antonio King
Staff Acoustical Engineer
October 15, 2018
Prepared for:
Cureton Midstream
5 18 17`h Street, Suite 650
Denver, CO 80202
Prepared by:
Behrens and Associates, Inc.
13806 Inglewood Avenue
Hawthorne California, 90250
Jason Peetz
Engineering Manager
Corporate t)llice: Il.n\thurne. ( dl)lomia
arson. Caliliuiiia lletlu. 're\,t' \apa ( ulilt)inia I ungnunit. Colorado McDonald. !'enns)!\ani
800-679-8633
\\\\\\.ei1\In'ninental-notse-contr''I.coin \\\\\\.drillingni'i'c )I lrt)l.ta)ni
Behrens and Associates, Inc.
Environmental Noise Control
1. Introduction
The following report provides a noise modeling assessment of the proposed Miskey Compressor Station operated by
Cureton Midstream in relation to the CRS 25-12-103 noise regulations. The noise modeling includes currently
proposed mechanical equipment per approved project documents dated 10/3/18. The Miskey Compressor Station
Facility (40° 7'47.67"N, 104°27'21.12"W) is located 0.8 miles east of the intersection between Weld County Road
63 and 1-76 Frontage Road, approximately 3.6 miles northeast of Keenesburg, Colorado. The site is bordered by
industrial and agricultural land with some single-family homes to the south. Figure 1-1 identifies the pad location.
To assess the predicted noise levels of the proposed operations, manufacturer sound level data of proposed equipment
and exhaust silencers was used when available. File sound level data previously measured and typical of the
equipment was used when manufacturer sound level performance data was not available. The equipment sound level
data was used to construct a noise model using SoundPLAN 7.4 software.
The following is provided in this report:
• A brief introduction of the fundamentals of noise.
• A review of the applicable CRS 25-12-103 noise standards.
• Discussion of noise modeling methodology and results.
Figure 1-1 Cureton Midstream Location
Introduction
1
Behrens and Associates, Inc.
Environmental Noise Control
2. Noise Fundamentals
Sound is most commonly experienced by people as pressure waves passing through air. These rapid fluctuations in
air pressure are processed by the human auditory system to produce the sensation of sound. The rate at which sound
pressure changes occur is called the frequency. Frequency is usually measured as the number of oscillations per
second or Hertz (Hz). Frequencies that can be heard by a healthy human ear range from approximately 20 Hz to
20,000 Hz. Toward the lower end of this range are low-pitched sounds, including those that might be described as a
"rumble" or "boom". At the higher end of the range are high-pitched sounds that might be described as a "screech"
or "hiss".
Environmental noise generally derives, in part, from a combination of distant noise sources. Such sources may include
common experiences such as distant traffic, wind in trees, and distant industrial or farming activities. These distant
sources create a low-level "background noise" in which no particular individual source is identifiable. Background
noise is often relatively constant from moment to moment but varies slowly from hour to hour as natural forces
change or as human activity follows its daily cycle.
Superimposed on this low-level, slowly varying background noise is a succession of identifiable noisy events of
relatively brief duration. These events may include the passing of single -vehicles, aircraft flyovers, screeching of
brakes, and other short-term events. The presence of these short-term events causes the noise level to fluctuate.
Typical indoor and outdoor A -weighted sound levels are shown in Figure 2-I. Detailed acoustical definitions have
been provided in Appendix A — Glossary of Acoustical Terms.
COMMON OUTDOOR NOISE LEVEL COMMON INDOOR
SOUND LEVELS dB (A) SOUND LEVELS
110 Rock Band
B-747-200 Takeoff at 2 mi.
Gas Lawn Mower at 3 ft.
Diesel Truck at 150 ft.
DC -9-30 Takeoff at 2 mi.
Noisy Urban Daytime
B-757 Takeoff at 2 mi
Commercial Area
Quiet Urban Daytime
Quiet Urban Nighttime
Quiet Suburban Nighttime
Quiet Rural Nighttime
tkit
100 Inside Subway Train
(New York)
90
80
70
60
50
40
30
20
10
Food Blender at 3 ft.
Garbage Disposal at 3 ft.
Shouting at 3 ft.
Vacuum Cleaner
atl0ft
Normal Speech
at3ft.
Large Business Office
Dishwasher Next Room
Small Theatre, Large
Conference Room
(Background)
Library
Bedroom at Night
Concert Hall (Background)
Broadcast & Recording
Studio
0 Threshold of Hearing
Figure 2-1 Typical Indoor and Outdoor A -Weighted Sound Levels
Noise Fundamentals
Behrens and Associates, Inc.
Environmental Noise Control
3. CRS 25-12-103 Noise Standards
The modeling analysis was developed to predict operational noise levels at adjacent properties and verify compliance
of operations with the CRS 25-12-103 noise standards. The CRS code establishes permissible sound levels by type
of property and hours of the day. The measurement location is defined in Section 25-12-103(1) as "Sound levels of
noise radiating from a property line at a distance of twenty-five feet or more therefrom in excess of the dB(A)
established for the following time periods and zones shall constitute prima facie evidence that such noise is a public
nuisance".
Based on the specifications of the CRS 25-12-103 code, the Residential and Industrial noise level limits listed in
Table 3-I will be used throughout the report.
Table 3-1. Colorado Noise Related Statues 25-12-103 (1) - Maximum Permissible Noise Levels
Zone
Maximum Noise (dBA)
7:00 am to next 7:00 pm
Maximum Noise (dBA)
7:00 pm to next 7:00 am
Residential
55 dBA
50 dBA
Commercial
60 dBA
55 dBA
Light Industrial
70 dBA
65 dBA
Industrial
80 dBA
75 dBA
CRS 25-12-103 Noise Standards
3
Behrens and Associates, Inc.
Environmental Noise Control
fkAt
4. Miskey Compressor Station Facility Noise Modeling
4.1 Noise Modeling Methodology
The noise modeling was completed with use of three-dimensional computer noise modeling software. All models in
this report were developed with SoundPLAN 7.4 software using the ISO 9613-2 standard. Noise levels are predicted
based on the locations, noise levels and frequency spectra of the noise sources, and the geometry and reflective
properties of the local terrain, buildings and barriers. SoundPLAN 7.4 software simulates light downwind conditions
in all directions to ensure conservative assessments. The predicted noise levels represent only the contribution of the
proposed compressor station operations and do not include ambient noise or noise from other facilities. Actual field
sound level measurements may vary from the modeled noise levels due to other noise sources such as traffic, other
facilities, other human activity, or environmental factors.
The equipment sound level data used in the Miskey Compressor Station Facility modeling was sourced from
equipment manufacturer data per approved project design documentation. The modeling results predicted are
dependent on equipment and mitigation orientation as indicated per current (Plot Date 10-3-18) project
documentation. Figure 4-1 shows the Miskey Compressor Station plot plan and mechanical equipment layouts
utilized in the study. Table 4-1 lists the modeled equipment for the facility which, per Cureton Midstream, was
confirmed to be identical to the Tiger Compressor Station.
Table 4-1 Equipment Modeled for Miskey Compressor Station Facility
Quantity
Equipment T) pe
Proposed Equipment
Data Source
Source Sound
Power Level
(Lw dBA)
4
Compressor Engine
CAT 3516B
Manufacturer Data
116.7
Compressor Engine
Exhaust
CAT 3516B with EMIT
4 Manufacturer Data 83.?
Silencer (See Appendix B)
,,
4
Compressor
Ariel JGT-4
Manufacturer Data
88.7
4
Compressor Heat
Exchanger
AXH 156EH
Manufacturer Data
100.2
4.2 Noise Sensitive Receptors
The noise sensitive receptors have been chosen to be consistent with the requirements of the CRS 25-12-103 noise
standards. The requirements indicate that sound levels of noise radiating from a property line at a distance of twenty-
five feet or more therefrom in excess of the dB(A) established for the following time periods and zones shall constitute
prima facie evidence that such noise is a public nuisance. As such, receptor locations were chosen at 25 ft. from the
surrounding property lines of the Miskey Compressor Station Facility to represent potential regulatory measurement
points should a complaint be made. Figure 4-2 shows the dBA noise sensitive receptor locations.
Miskey Compressor Station Facility Noise Modeling
4
Behrens and Associates, Inc.
Environmental Noise Control
I
1
oa
I
Is
•
Ire
ab
Maar me 11341
•1+1. ear's
MM .• a-
-•a to •a •a
rata
• • — • — • —State ••.• •'•f f••• •—• !t• .ellSe•._ - _ - 1.r S••r•M•••..a..r• ISO Seas sae Seas laa• wag • rT••'f•••••S-S•
I
I -
I
I
•
I
I
i
B
o
•_
• •=
• ❑
• •
a
•s •s
._ _ . _
At. -7 it
•
. - _ • . —. . . — . .—..�. r• -
O0 o a nu
9999
lea —
w:
=10-•
-+tea
•.-M a •w a •.
D••MINDI
I
it
Il
I Ir1110N1
1
••••• •.
w 411. at
• .t
e
1
f
10O
N
Ron
4••• .
.nva MOO
u r ter •r
•J'A I' .• IC
•
Ism as, below.
Cal IS pu IY•
nano•UIMfpM rall•IINrli�I
a
--.n.e9u•c m
a•. YY Oa* M• .• •Y
w•ac • 5* r ••r
g1YU ••
OMIIO
lelle••• pew
•
For Information Only
I.nt ►0/ Calrtnaon
ma
1•„lllI we.Y.
Mak ec111N[bl nmD.
SKPO co.MH600 STATION
urn
DIVROP.D O1A.NAGI ••%1.1 No -
Figure 4-1 Miskey Compressor Station Facility Plot Plan (Plot Date 10/3/18, Drawing #18177)
12177
s■s
Miskey Compressor Station Facility Noise Modeling
Behrens and Associates, Inc.
Environmental Noise Control
Figure 4-2 Noise Sensitive Receptor Locations (dBA)
I t't'upful 4
Receptor 4
Parcel
130320000004
Property Line
dBA Compliance Assessment Locations
Receptor 2
Receptor 3
Miskey Compressor Station Facility Noise Modeling
Behrens and Associates, Inc.
Environmental Noise Control
4.3 Noise Modeling Results
Two modeling scenarios were created to investigate various options at the proposed site and are described in Table
4-2. The results of the noise modeling are presented in Table 4-3. The locations in the tables correspond to the receptor
locations identified in Figure 4-2. The results of the noise modeling are also shown as noise contour maps. Figure 4-
4 shows the Scenario 1 Noise Contour Map in dBA and Figure 4-5 shows the Scenario 2 Noise Contour Map in dBA.
The noise contours are provided in 5 dB increments with the color scale indicating the sound level of each contour.
Table 4-2 Modeled Scenarios
Modeled Scenario
Description
Scenario l
Unmitigated — Compressor skids are modeled with specified EMIT engine exhaust
silencers but are not enclosed and do not included any additional sound mitigation.
Scenario 2
Mitigated — Compressor skids are modeled with specified EMIT engine exhaust
silencers with a minimum insertion loss per Appendix B and an acoustical
permanent sound wall with an approximate height of 24 ft. and with a Sound
Transmission Class (STC) rating of at least 40 to be installed east of the outermost
compressor skid (see Figure 4-3).
Table 4-3 Noise Modeling Results (dBA)
Receptor
Location Description
Scenario 1
Scenario 2
Location 1
25 ft. from North Property Line of Parcel#
130320000004 (Industrial)
63.3*
63.3*
Location 2
25 ft. from East Property Line of Parcel#
130320000004 (Agricultural)
..•;3.4
44.2
Location 3
25 ft. from South Property Line of Parcel#
130320000004 (Agricultural)
; 7
37. 1
Location 4
25 ft. from West Property Line of Parcel#
130320000004 (Agricultural)
46.3
46.3
Allowable Noise
Level
25 ft. from the property line of potential noise
complainant.
55.0 Day /
50.0 Night
1 f
ndustrial zoning noise limits per CRS 25-12-103 code listed in Table 3-1 apply.
The numerical and graphical noise modeling results for Scenario I indicate that the proposed operations of the Miskey
Compressor Station are predicted to exceed the CRS noise limit by 3.4 dBA at Receptor Location 2. With
implementation of the mitigation outlined in Scenario 2, the modeled receptor locations will comply with the daytime
and nighttime dBA limits for CRS 25-12-103.
Miskey Compressor Station Facility Noise Modeling
7
Behrens and Associates, Inc.
Environmental Noise Control
r
N
/ \
O
O
m
C
a
I
M
40'
O
80,
RAM OA
N 1 292 055.0C
E 3 292 230.00
24 -toot -high, STC-40
Acoustical Permanent
Sound Wall
Figure 4-3 Scenario 2 Proposed Mitigation
Miskev Compressor Station Facility Noise Modeling
Behrens and Associates, Inc.
Environmental Noise Control
Figure 4-4 Scenario 1 Noise Contour Map (dBA)
Average Noise
Level, Leq dBA
= 30.0
= 35.0
= 40.0
= 45.0
= 50.0
= 55.0
= 60.0
= 65.0
= 70.0
= 75.0
= 80.0
= 85.0
= 90.0
0 200400600800
feet
Miskey Compressor Station Facility Noise Modeling
9
Behrens and Associates, Inc.
Environmental Noise Control
Figure 4-5 Scenario 2 Noise Contour Map (dBA)
Average Noise
Level. Leq dBA
30.0
= 35.0
= 40.0
= 45.0
- 50.0
= 55.0
= 60.0
= 65.0
= 70.0
= 75.0
= 80.0
= 85.0
= 90.0
0 200400600800
I] feet
Miskey Compressor Station Facility Noise Modeling
10.
Behrens and Associates, Inc.
Environmental Noise Control
5. Conclusion
Predictive noise models were created to represent the proposed operations at the Miskey Compressor Station Facility
operated by Cureton Midstream. Noise sensitive receptor locations included in the models were placed in compliance
with the noise standards of CRS 25-12-103.
The numerical and graphical noise modeling results for Scenario 1 indicate that the proposed operations of the Miskey
Compressor Station are predicted to exceed the CRS noise limits by 3.4 dBA at Receptor Location 2. With
implementation of the recommended mitigation outlined in Scenario 2, the modeled receptor locations will comply
wt ith the daytime and nighttime dBA limits for CRS 25-12-103.
Conclusion
11
Behrens and Associates, Inc.
Environmental Noise Control
/.4
fv _
Appendix A - Glossary of Acoustical Terms
Glossary of Acoustical Terms
12
Behrens and Associates, Inc.
Environmental Noise Control
1
Ambient Noise
The all -encompassing noise associated with a given environment at a specified time, usually a composite
of sound from many sources both near and far.
Average Sound Level
See Equivalent -Continuous Sound Level
A -Weighted Decibel Scale
The human ear is more sensitive to some sound frequencies than others. It is therefore common practice to
apply a filter to measured sound levels to approximate the frequency sensitivity of the human ear. One such
filter is called the A -weighted decibel scale which emphasizes sounds between 1,000 and 5,000 Hertz by
discounting the frequencies outside of this range. As the human ear is less sensitive to low frequency noise,
the A -weighted decibel scale begins to increasingly discount noise below 500 Hertz.
Measurements conducted utilizing the A -weighted decibel scale are denoted with an "(A)" or "A" after the
decibel abbreviation (dB(A) or dBA). The A -weighted scale is nearly universally used when assessing noise
impact on humans.
C -Weighted Decibel Scale
High level low frequency noise can propagate large distances from its source. Although not always audible,
high levels of low frequency noise can induce vibrations in objects or structures which could become
evident in ways that might be annoying to humans (e.g., rattling of windows). The C -weighted decibel
scale, which was developed to estimate human ear sensitivity to high noise levels, is a flatter filter that does
not discount low frequency noise as much as the A -weighted decibel scale. As a result, a C -weighted decibel
measurement could be significantly higher than an A -weighted decibel measurement if the noise being
measured contains a heavy low frequency content.
Measurements conducted utilizing the C -weighted decibel scale are denoted with an "(C)" or "C" after the
decibel abbreviation (dB(C) or dBC). C -weighted noise level limits are sometimes included in noise
regulations as a way to address low frequency environmental noise issues.
Community Noise Equivalent Level (CNEL)
A 24 -hour A -weighted average sound level which takes into account the fact that a given level of noise may
be more or less tolerable depending on when it occurs. The CNEL measure of noise exposure weights
average hourly noise levels by 5 dB for the evening hours (between 7:00 pm and 10:00 pm), and 10 dB
between 10:00 pm and 7:00 am, then combines the results with the daytime levels to produce the final
CNEL value. It is measured in decibels, dbs.
Day -Night Average Sound Level (Ldn)
A measure of noise exposure level that is similar to CNEL except that there is no weighting applied to the
evening hours of 7:00 pm to 10:00 pm. It is measured in decibels, dB.
Glossary of Acoustical Terms
13
Behrens and Associates, Inc.
Environmental Noise Control
Daytime Average Sound Level
The time -averaged A -weighted sound level measured between the hours of 7:00 am to 7:00 pm. It is
measured in decibels, dB.
Decay Rate
The time taken for the sound pressure level at a given frequency to decrease in a room. It is measured in
decibels per second, dB/s.
Decibel (d l3)
The basic unit of measurement for sound level.
Direct Sound
Sound that reaches a given location in a direct line from the source without any reflections.
Divergence
The spreading of sound waves from a source in a free field, resu I t i n`` in a reduction in sound pressure level
with increasing distance from the source.
Energy Basis
This refers to the procedure of summing or averaging sound pressure levels on the basis of their squared
pressures. This method involves the conversion of decibels to pressures, then performing the necessary
arithmetic calculations, and finally changing the pressure back to decibels.
Equivalent -Continuous Sound Level (Leq)
The average sound level measured over a specified time period. It is a single -number measure of time -
varying noise over a specified time period. It is the level of a steady sound that, in a stated time period and
at a stated location, has the same A -Weighted sound energy as the time -varying sound. For example, a
person who experiences an Leq of 60 dB(A) for a period of 10 minutes standing next to a busy street is
exposed to the same amount of sound energy as if he had experienced a constant noise level of 60 dB(A)
for 10 minutes rather than the time -varying traffic noise level. It is measured in decibels, dB.
Fast Response
A setting on the sound level meter that determines how sound levels are averaged over time. A fast sound
level is always more strongly influenced by recent sounds, and less influenced by sounds occurring in the
distant past, than the corresponding slow sound level. For the same non -steady sound, the maximum fast
sound level is generally greater than the corresponding maximum slow sound level. Fast response is
typically used to measure impact sound levels.
Field Impact Insulation Class (FIIC)
A single number rating similar to the impact insulation class except that the impact sound pressure levels
are measured in the field.
Glossary of Acoustical Terms
14
Behrens and Associates Inc.
Environmental Noise Control
Field Sound Transmission Class (FSTC)
A single number rating similar to sound transmission class except that the transmission loss values used to
derive this class are measured in the field.
Flanking Sound Transmission
The transmission of sound from a room in which a source is located to an adjacent receiving room by paths
other than through the common partition. Also, the diffraction of noise around the ends of a barrier.
Frequency
The number of oscillations per second of a sound wave
Hourly Average Sound Level (HNL)
The equivalent -continuous sound level, Leq, over a I -hour period.
Impact Insulation Class (IIC)
A single number rating used to compare the effectiveness of floor/ceiling assemblies in providing reduction
of impact -generated sound such as the sound of a person's walking across the upstairs floor.
Impact Noise
The noise that results when two objects collide.
Impulse Noise
Noise of a transient nature due to the sudden impulse of pressure like that created by a gunshot or balloon
bursting.
Insertion Loss
The decrease in sound power level measured at the location of the receiver when an element (e.g., a noise
barrier) is inserted in the transmission path between the sound source and the receiver.
Inverse Square Law
A rule by which the sound intensity varies inversely with the square of the distance from the source. This
results in a 6dB decrease in sound pressure level for each doubling of distance from the source.
Ln Percentile Sound Level
The noise level exceeded for n% of the measurement period where n is between 0.01% and 99.99%. Usually
includes a descriptor i.e. A -weighting. Common Ln values include LA W, LA50, and LA90 levels. LA 10
would represent the A -weighted sound level that is exceeded for 10% of the measurement period.
Masking
The process by which the threshold of hearing for one sound is raised by the presence of another sound.
Maximum Sound Level (Lmax)
The greatest sound level measured on a sound level meter during a designated time interval or event.
Glossary of Acoustical Terms
15
Behrens and Associates, Inc.
Environmental Noise Control
NC Curves (Noise Criterion Curves)
A system for rating the noisiness of an occupied indoor space. An actual octave -band spectrum is compared
with a set of standard NC curves to determine the NC level of the space.
Noise Isolation Class (MC)
A single number rating derived from the measured values of noise reduction between two enclosed spaces
that are connected by one or more partitions. Unlike STC or NNIC, this rating is not adjusted or normalized
to a measured or standard reverberation time.
Noise Reduction
The difference in sound pressure lei el between any two points.
Noise Reduction Coefficient (NRC)
A single number rating of the sound absorption properties of a material. It is the average of the sound
absorption coefficients at 250, 500, 1000, and 2000 Hz, rounded to the nearest multiple of 0.05.
Normalized Noise Isolation Class (NNIC)
A single number rating similar to the noise isolation class except that the measured noise reduction values
are normalized to a reverberation time of 0.5 seconds.
Octave
The frequency interval between two sounds whose frequency ratio is 2. For example, the frequency interval
between 500 Hz and 1.000 Hz is one octave.
Octave -Band Sound Level
For an octave frequency band, the sound pressure level of the sound contained within that band.
One -Third Octave
The frequency interval between two sounds whose frequency ratio is 2^(1/3). For example, the frequency
interval between 200 Hz and 250 Hz is one-third octave.
One -Third -Octave -Band Sound Level
For a one -third -octave frequency band, the sound pressure level of the sound contained within that band.
Outdoor -Indoor Transmission Class (OITC)
A single number rating used to compare the sound insulation properties of building fa�ade elements. I h i
rating is designed to correlate with subjective impressions of the ability of fa�ade elements to reduce the
overall loudness of ground and air transportation noise.
Peak Sound Level (Lpk)
The maximum instantaneous sound level during a stated time period or event.
Pink Noise
Noise that has approximately equal intensities at each octave or one -third -octave band.
Glossary of Acoustical Terms
16
Behrens and Associates, Inc.
Environmental Noise Control
Point Source
A source that radiates sound as if from a single point.
RC Curves (Room Criterion Curves)
A system for rating the noisiness of an occupied indoor space. An actual octave -band spectrum is compared
with a set of standard RC curves to determine the RC level of the space.
Real -Time Analyzer (RTA)
An instrument for the determination of a sound spectrum.
Receiver
A person (or persons) or equipment which is affected by noise.
Reflected Sound
Sound that persists in an enclosed space as a result of repeated reflections or scattering. It does not include
sound that travels directly from the source without reflections.
Reverberation
The persistence of a sound in an enclosed or partially enclosed space after the source of the sound has
stopped, due to the repeated reflection of the sound waves.
Room Absorption
The total absorption within a room due to all objects, surfaces and air absorption within the room. It is
measured in Sabins or metric Sabins.
Slow Response
A setting on the sound level meter that determines how measured sound levels are averaged over time. A
slow sound level is more influenced by sounds occurring in the distant past that the corresponding fast
sound level.
Sound
A physical disturbance in a medium (e.g., air) that is capable of being detected b` the human ear.
Sound Absorption Coefficient
A measure of the sound -absorptive property of a material.
Sound Insulation
The capacity of a structure or element to prevent sound from reaching a receiver room either by absorption
or reflection.
Sound Level Meter (SLM)
An instrument used for the measurement of sound level, with a standard frequency -weighting and standard
exponentially weighted time averaging.
Glossary of Acoustical Terms
17
Behrens and Associates, Inc.
Environmental Noise Control
N _
Sound Power Level
A physical measure of the amount of power a sound source radiates into the surrounding air. It is measured
in decibels.
Sound Pressure Level
A physical measure of the magnitude of a sound. It is related to the sound's energy. The terms sound
pressure level and sound level are often used interchangeably.
Sound Transmission Class (STC)
A single number rating used to compare the sound insulation properties of walls, floors, ceilings, windows,
or doors. This rating is designed to correlate with subjective impressions of the ability of building elements
to reduce the overall loudness of speech, radio, television, and similar noise sources in offices and buildings.
Source Room
A room that contains a noise source or sources
Spectru m
The spectrum of a sound wave is a description of its resolution into components, each of different frequency
and usually different amplitude.
Tapping Machine
A device used in rating different floor constructions against impacts. It produces a series of impacts on the
floor under test, 10 times per second.
Tone
A sound with a distinct pitch
Transmission Loss (TL)
A property of a material or structure describing its ability to reduce the transmission of sound at a particular
frequency from one space to another. The higher the TL value the more effective the material or structure
is in reducing sound between two spaces. It is measured in decibels.
White Noise
Noise that has approximately equal intensities at all frequencies.
Windscreen
A porous covering for a microphone. designed to reduce the noise generated by the passage of wind over
the microphone.
Glossary of Acoustical Terms
18
Behrens and Associates, Inc.
Environmental Noise Control
Appendix B - Acoustical Performance Data
Acoustical Performance Data
19
Behrens and Associates, Inc.
Environmental Noise Control
1
N _
Scenario 1 and 2 — CAT 3516B Engine Exhaust Silencer Insertion Loss
EMIT Silencer Model
4200Z-1616E-43CEE
Octave Band Center Frequency (Hz)
31.5
63
125
250
500
1000
2000
4000
8000
Insertion Loss (dB)
17.0
30.0
47.0
50.0
45.0
46.0
47.0
47.0
47.0
Acoustical Performance Data
20
CURETON
MIDSTREAM
Oct. 5. 2018
Dear Landowner:
Cureton Midstream proposes to construct, operate. and maintain the Miskey Compressor
Station in Weld County, Colorado. The natural gas compressor station will be located east of the
intersection of County Road 398 and County Road 63. A project map is included on the reverse
side of this letter.
Compressor stations help to safely transport natural gas through pipelines over long distances
by maintaining appropriate internal pipeline pressure. This natural gas provides industrial.
commercial. and residential customers with natural gas for heat, energy for appliances, and
generating electricity. The Miskey Compressor Station will include equipment that operates 24
hours a day such as motors and pumps to maintain consistent pressure in the pipeline to allow
the natural gas to safely flow through it.
Cureton Midstream will submit permit applications for the Miskey Compressor Station to the
Weld County Planning Department in late October 2018. Construction is expected to begin in
June 2019 with an in-service date of September 2019. Please note that construction schedules
are subject to change.
Cureton Midstream invites you to attend a community meeting to learn more about this project.
At the community meeting you will have the opportunity to view project informational materials
and detailed maps, ask questions. and provide your comments.
Please join us at the community meeting to learn more:
Date: Thursday, Oct. 18. 2018
Time: 5:30 p.m. - 7:30 p.m. (open house format)
Location: Weld Central Middle School
4977 County Road 59
Keenesburg. CO 80643
For additional information about the community meeting and the project. please contact the
project team at 1-833-CURETON (833-287-3866) or MiskeyO_CuretonMidstream.com.
We hope you can attend the Miskey Compressor Station community meeting.
Respectfully.
/v_//1
mac_0
Nick Holland
Director EHSR
Cureton Midstream
LURET:H
MIDSTREAM
Project Map
Miskey
STATE OF COLORADO
1127 N SHERMAN ST. STE 300
DENVER, CO 80204
KAUFFMAN BROTHERS LIMITED
PARTNERSHIP
8616 COUNTY ROAD 63
KEENESBURG. CO 80642
PLAINS MARKETING L P
333 CLAY ST, STE 1600
HOUSTON. TX 80642
PROSPECT VALLEY DAIRY LLC
15857 BEAR MOUNTAIN BLVD
BAKERSFIELD. CA 80642
MARK & LEE KAUFFMAN
PARTNERSHIP
8616 COUNTY ROAD 63
KEENESBURG CO 80642
COLORADO
Department of Public
Health & Environment
Facility Activity :
Disturbed Acres:
Facility Located at:
CERTIFICATION TO DISCHARGE
UNDER
CDPS GENERAL PERMIT COR-0300000
STORMWATER ASSOCIATED WITH CONSTRUCTION ACTIVITIES
Certification Number: COR035846
This Certification to Discharge specifically authorizes:
Cureton Front Range LLC
to discharge stormwater from the facility identified as
Weld County Midstream pipelines project
To the waters of the State of Colorado, including, but not limited to:
- South Platte River
Gas transmission pipelines
Pipeline and utilities
400 acres
Eastern Weld county uninc CO 80504
Weld County
Latitude 40.52392 Longitude -104.20446
Specific Information
(if applicable):
Certification is issued and effective: 2/21/2018
Expiration Date: This authorization expires upon effective date of the General Permit COR030000 renewal unless
otherwise notified by the division.
`ADMINISTRATIVELY CONTINUED
This certification under the permit requires that specific actions be performed at designated times. The certification
holder is legally obligated to comply with all terms and conditions of the permit.
This certification was approved by:
Margo Griffin Work Group Lead
Permits Section
Water Quality Control Division
*explanation of Admin Continued in cover letter
4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.cotorado.gov/cdphe/wqcd
John W Hickenloaner Governor Larry Wolk MD MSPH Executive Director and Chief Medical Officer
Hello