HomeMy WebLinkAbout20191478.tiffUSE BY SPECIAL REVIEW (USR) APPLICATION
DEPARTMENT OF PLANNING SERVICES * 1555 N. 17TH AVENUE * GREELEY, Co 80631
w w.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*: 0
Address of site:
8 0 1_ 2 2_ 3 _ 0 0 _0 0 7
27385 County Road 66, Gill, CO 80624
Legal Description: A portion of the south half
Zone District: AG
Acreage: 47.03
FEE OWNER(S) OF THE PROPERTY:
N ame: Quokka Investments Colorado LLC
Section: 22
(*A 12 digit number on Tax I.D.
information, obtainable at
www.wel d q ov. corm) .
Township: 6 N Range: 64
v r
Floodplain: eological Hazard: YON Airport Overlay: Y$')N
Company:
Phone #: 2817051702
Street Address:
9202 Minsmere Cir
Email: rMummO2gmail.cam
City/State/Zip Code:
N ame:
Spring TX 77379
Company:
Phone #:
Street Address:
City/State/Zip Code:
N ame:
Email:
Company:
Phone #: Email:
Street Ad d ress :
City/State/Zip Code:
APPLICANT OR AUTHORIZED AGENT: (See below: Authorization must accompany all applications signed by Authorized Agents)
N ame: Stephen Mumm
Company: Quokka Investments Colorado LLC
Phone #: 2817051702 Email: MrMumm02@gmail.com
Street Address: 9202 Minsmere Cir
City/State/Zip Code: Spring TX 77379
PROPOSED USE:
Truck parking
I (We) hereby depose and state under penalties of perjury that all statements, proposals, and/or plans submitted with or
contained within the application are true and correct to the best of my (our)knowledge. Signatures of all fee owners of property
must sign this application. If an Authorized Agent signs, a letter of authorization from all fee owners must be included with the
appVicattion. of .a corporatisn is the fee owner, notarized evidence must be included indicating that the signatory has to legal
authorityiign or t - orporation.
10/30/2018
SigS ure: Geier- or Authorized Agent Date Signature: Owner or Authorized Agent Date
Stephen Mumm
Print Name Print Name
Rev 4/2016
DEPARTM E T OF PLA I GA DB ILDI G
DEPARTME T OF P BLIC HEALTH A D E VIRO ME T
1555 O RT H 17TH AVE E
GREELEY, CO 80631
AUTHORIZATION FORM
uokka Investments Colorado LLC
Ste hen Mumm
Owner lease rint
, give ermission to Chad Braunsroth
Authori ed Agent lease rint
to a ly for any Planning, Building or Se tic ermits on our behalf, for the ro erty located at address or
arcel number below
27385 County Road 66, Gill CO 80624
Legal Descri tion South Half
of Section 22 , Townshi 6 , Range 64 W
Subdivision ame Lot B, RE 0801-22-03 RECX 17-0154
Pro erty Owners Information
Address 9202 M.insmere Cir, S ring TX 77379
Phone 281-705-1702
Lot Block
Authori ed Agent Contact Information
E-mail MrMumm02 a@hotmail.com
Address 2905 Blue Acona Way, Johnstown CO 80534
Phone 307-262-6519 E -Mail cbservices6519@gmail.com
Corres ondence ence to be sent to Owner Authori ed Agent X Both by Mail Email X
Additional Info
Owner Signature
Date 19 OV 2018
Owner Signature Date
USE BY SPECIAL REVIEW (USR) QUESTIONNAIRE — QUOKKA INVESTMENTS COLORADO LLC
Planning Questions:
1, Explain, in detail, the proposed use of the property
We are requesting a Use by Special Review to park 6-10 semi trucks and 5 pickup trucks on the property.
These commercial vehicles will be used to support a land remediation business. Trucks will be parked
overnight in the planned parking lot on the west side of the existing building. No remediation will occur
on site and no soils or other materials will be stored on site.
Reground asphalt or road base will be put on the driveway from country road 66 and the parking lot
(total area under 1 acre). There will be no washing of trucks or storage of materials on site. Future
building plans include a portable office building.
Most of these areas are grassland and alfalfa used for our animals.
Basic maintenance on the equipment will be done in the shop, all other repairs to equipment is either
done by an outside mechanic or out on the road.
Future building plans are the portable office building, and other areas noted on the map.
2. Explain how this proposal is consistent with the intent of the Weld County Code, Chapter 22 of the
Comprehensive Plan.
This USR application has been prepared utilizing the process outlined in the Weld County Code and
Procedural Guides. The Guiding Principles of theComprehensive Plan found in Section 22-1-120 states,
"Land use changes must afford flexibility based on specific location and particular circumstances
encountered within the locality. It is also important to weigh the cumulative impacts that specific land
use changes will have." This proposal is respectful of surrounding use.
This application is consistent with Section 22-2-2-6 A. Goal 7 "County land use regulations should
protect the individual property owner's right to request a land use change. And 2. A. Policy 7.2.
Conversion of agricultural land to non u roan 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 site is in an area that can support the proposed use.
This proposal is compatible with the surrounding area.
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 proposal is for semi-truck/semi-trailer parking in the A (Agricultural) Zone District. This proposal is
allowed in the A Zone as a Use By Special Review as called in Chapter 23, 23-3-40.
23-3-4-S. Any use permitted as a Use By Right, an accessory use, or a Use by Special Review in the
commercial or industrial zone districts, provided that the property is not a Lot in an approved or
recorded subdivision plat or lots parts of a map or plan filed prior to adoption of any regulations
controlling subdivisions. PUD development proposals shall not be permitted to use the special review
permit process to develop.
Adequate provision has been made to protect the health, safety and welfare of the inhabitants of the
neighborhood and the County. Operation Standards as found in Section 23-2-260 of the Weld County
Code were consulted in preparing this application.
4. Describe what type of land uses surround the site. Explain how the proposed use is consistent and
compatible with surrounding land uses.
The surrounding area has multiple uses including agricultural, cattle grazing, oil and gas production, and
daily/hog farms. Current USRs in the immediate area include tractor trailer parking and maintenance
(USR 12-0067), hog farm (SUP -391), dairy (USR 1340 and USR 820AM), mineral reserve development
(ICI USR 12-0016), and auto/farm equipment repair (USR 1491).
5. What are the hours and days of operation? (e.g. Monday thru Friday 8:00 a.m. to 5:00 p.m.)
Parking at the facility will occur 24 hours a day, 7 days a week. The primary hours of the operation are
7AM to SP (daylight hours) Monday through Friday. Occasional operations outside of the primary
hours are required to support clients.
6. List the number of full time and/or part time employees proposed to work at this site.
Six to ten drivers will access the site in the morning to ready and depart with their trucks for the day.
They will return in the evening to park. The drivers are typically on site for no more than 2 hours per
day. Minor repairs may be performed in the shop to support operations. Two office help will be on site
part time Monday — Friday.
7. If shift work is proposed include the number of employees per shift.
Shift work is not proposed.
8. List the number of people who will use this site. Include contractors, truck drivers, customers,
volunteers, etc.
It is proposed that approximately six to ten drivers and two office help will use the site Mon -Fri. Two or
three visitors/guests/delivery drivers are expected per week.
9. If this is a dairy, livestock confinement operation, kennel, etc., list the number and type of animals.
N/A
10. Describe the type of lot surface and the square footage of each type. (e.g. asphalt, gravel,
landscaping, dirt, grass, buildings)
he property is just over 2 million sqft. About 65,000 sqft of the property will be reground asphalt, road
base for parking and access. There is currently one 40'xS0' building (4800 sqft) and one proposed
60/x12' building (720 sqft) to supporting operations. All other land surface is grass and alfalfa.
11. How many parking spaces are proposed? How many handicapped (ADA) parking spaces are
proposed?
The site will contain an existing improved ground asphalt surface parking area. There will approximately
20 spaces available to park semi -tractor or trailers. As the parking area is ground asphalt, striping and
specific spaces for personal vehicles are not specified. Drivers will have an area of the ground asphalt
on the west side of the shop to park personal vehicles. There is also an area on the north side of the
proposed portable office for the office employees to park. This facility is not open to the public.
12. Explain the existing and proposed landscaping for the site.
There are existing landscape improvements around site. Trees may be planted in the future to provide
visual screening, wind protection along driveway, parking area and parts of fence line perimeter.
13. Describe the type of fence proposed for the site (e.g. 6 -foot chain link with earth tone slats)
The entire property perimeter is barb wire / woven wire fence.
14. Describe the proposed screening for all parking and outdoor storage areas. If the site is located in
a floodplain outdoor storage is restricted.
N/A. The subject property is not located in a floodplain.
15. Explain any proposed reclamation procedures when termination of the Use by Special Review
activity occurs.
If business/parking cease to occur on -site the subject property will be used as a single family residential
site.
16. Who will provide fire protection to the site?
The Kersey Fire Protection District will provide fire protection for this site.
17. List all proposed onesite 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.
No off -site improvements are proposed. On -site improvements include improved ground asphalt
surfaces, landscaping, and permitting for a possible portable office building.
Engineering questions:
1. Describe how many roundtrips/day are expected for each vehicle type: Passenger Cars/Pickups,
Tandem Trucks, Semi-Truck/Trailer/RV (Roundtrip = 1 trip in and 1 trip out of site)
Typical vehicles accessing this site include employee and owner vehicles and semi -tucks. The following
n umbers are expected for this facility:
Semi -tractor trailers: up to 10 trucks, 1 round trip per day.
Pickup and cars: up to 12 pickup trucks (drivers and office personnel) will make 1 round trip per day.
2. Describe the expected travel routes for site traffic.
Vehicles will enter the site from WCR 66 though the east entrance. Vehicles will enter the parking lot
n orth of the 40'x80' building. Vehicles will exit the parking lot south of the 40'x80' building. The
driveway will be used for entering and exiting vehicles.
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.)
We expect ^'6O% of the traffic will flow in and out from the west and ''40% from the east on WCR66.
4. Describe the time of day that you expect the highest traffic volumes from above.
We expect the highest volume of traffic from 7-8AM and 4-5 PM (daylight hours). On occasion, trucks
may return to the yard at anytime.
5. Describe where the access to the site is planned.
Vehicles will enter and exit the site though the east entrance to WCR 66. The existing access to this
property is located on W0R 66 approximately 0.4 miles east of WCR 55.
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 FA.
A. Does your site qualify for an exception to stormwater detention? If so, describe in a drainage
n arrative the following:
1. Which exception is being applied for and include supporting documentation.
2. Where the water originates if it flows onto the property from an offsite source
3. Where it flows to as it leaves the property
4. The direction of flow across the property
5. If there have been previous drainage problems with the property
Storm water on this property drains to the north and west of the 40'x80' building onto the grass and
alfalfa.
B. Does your site require a stormwater detention pond? If so, the following applies:
1. A drainage report summarizing the detention pond design with construction drawings and
maintenance plan shall be completed by a Colorado Licensed Professional Engineer and
adhere to the drainage related sections of the Weld County Code.
The drainage report must include a certification of compliance stamped and signed by the PE
which can be found on the engineering website.
3. A general drainage report guidance checklist is available on the engineering website. More
complete checklists are available upon request.
N/A
Environmental Health questions:
1. What is the drinking water source on the property?
If utilizing a drinking water well include either the well permit or well permit application that was
submitted to the State -Division of Water Resources. If utilizing a public water tap include a letter
from the Water District, a tap or meter number, or a copy of the water bill.
Water tap premise number: 5040
Bottled water will be provided for office help and drivers. Drivers will be on site for less than two (2)
hours at a time.
2. What type of sewage disposal system is on the property?
If utilizing an existing septic system provide the septic permit number. If there is no septic permit due
to the age of the existing septic system, apply► for a septic permit through the Department of Public
Health and Environment prior to submitting this application. If a new septic system will be installed
please state "a new septic system is proposed". Only propose portable toilets if the use is consistent
with the Department of Public Health and Environment's portable toilet policy.
There will be a portable toilet on site that is provided and maintained by a local business.
3. If storage or warehousing is proposed, what type of items will be stored?
Up to 10 semi-truck/trailer are proposed to be parked at this facility. Storage and warehousing is not
proposed to be a main activity of this request; however, storage in compliance with Weld County Code
may occur on -site.
4. Describe where and how storage and/or stockpile of wastes, chemicals, and/or petroleum will
occur on this site.
No oil changes on equipment will be done on site. This will be done on the road at truck stop shops.
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.
WA
6. If there will be washing of vehicles or equipment on site indicate how the wash water will be
contained.
This site will not be used as a washing facility for equipment.
7. If there will be floor drains indicate how the fluids will be contained.
N/A
S. Indicate if there will be any air emissions. (e.g. painting, oil storage, etc.)
There will be no air emissions created by the activities on site.
9. Provide a design and operations plan if applicable. (e.g. composting, landfills, etc.)
N/A
10. Provide a nuisance management plan if applicable. (e.g. dairies, feedlots, etc.)
The facility will adhere to the maximum permissible noise levels allowed in the Agricultural Zone District.
Sources of light are directed so that light rays will not shine directly onto adjacent properties where such
light would cause a nuisance or interfere with the use of adjacent properties. Neither the direct, nor
reflected light from any source will create a traffic hazard to operators of motor vehicles on public or
private roads. No colored light will be used which may be confused with, or construed as, traffic control
devices. All lighting will be downcast and shielded.
The property owner will be responsible for controlling noxious weeds on the site. Trash will be collected
in a covered, confined trash dumpster and removed monthly by a trash removal company.
All roadway, parking and operations areas will have improved gravel surfaces (ground asphalt).
Watering of surfaces will occur as necessary to suppress dust.
11. Additional information may be requested depending on type of land use requested.
N/A
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.
There is currently one 40'x80►' steel building (4800 sqft) on site. We also have proposed on 60/x12/
portable building (720 sqft) to support operations.
2. Explain how the existing structures will be used for this USR?
The existing shop will be for personal use by property owners and used for, minor repairs to equipment.
3. List the proposed use(s) of each structure
The shop (40'x80' steel building) will be used for minor repairs on semi -truck and trailers as well as for
personal use. The proposed portable office will be used by the owners and office employee for the daily
needs of the business.
Surrounding property owners:
Weld Farms LLC
Account: R7944199 Parcel: 080122000080, Section: 22 Township: 6N Range: 64W
Account R7088897 Parcel: 080122100072, Section: 22 Township: 6N Range: 64W
Carpi(); Raymond E and Caprio, Debra M
R8745800 Parcel: 080122000084, Section: 22 Township: 6N Range: 64W
Corbin, Wayne W and Corbin, Jamie K
Account: R0115489 Parcel: 080122000067, Section: 22 Township: 6N Range: 64W
Address: 27505 COUNTY ROAD 66 WELD
Lyon, Edyth A and Haithcoat, Vicki Lynn
Account R8952930 Parcel: 080122300006, Section: 22 Township: 6N Range: 64
Address: 27455 COUNTY ROAD 66 WELD
McElroy, Dean P
Account: R1205586 Parcel: 080122000053, Section: 22 Township: 6N Range: 64W
Address: 27491 COUNTY ROAD 66 WELD
Roth, Janet M and Roth Gerald L
Account: 84572206 Parcel: +080127200027, Section: 27 Township: 6N Range: 64W
Account: R4572506 Parcel: 080127200030, Section: 27 Township: 6N Range: 64W
Account: R4572306 Parcel: 080127200028, , Section: 27 Township: 6N Range: 64W
Rea, Natividad
Account: R8051599 Parcel: 080127000047, Section: 27 Township: 6N Range: 64W
Address: 27374 COUNTY ROAD 661 WELD
Fox, Josh Land Anna
Account: R7965699 Parcel: 080127000045, Section: 27 Township: 6N Range: 64W
Address: 27236 COUNTY ROAD 66 WELD
Miller, Shane Albert
Account: R4186906 Parcel: 080122 00001, Section: 22 Township: 6N Range: 64W
Account: R4186306 Parcel: 080122300002, Section: 22 Township: 6N Range: 64W
Address: 27215 COUNTY ROAD 66 WELD
Perkins, Christene E and Glen A Jr
Account: R1205486 Parcel: 080122000045, Section: 22 Township: 6N Range: 64W
Address: 27195 COUNTY ROAD 66 WELD
H e l b u rg, Lester
Account: R0450801 Parcel: 080122000085, Section: 22 Township: 6N Range: 64W
Helburg, Lester and Hell burg Kimberly
Account: R0450701 Parcel: 080122000081, Section: 22 Township: 6N Range: 64W
Address: 32300 COUNTY ROAD 55 WELD
This list was compiled from the records of the Weld County Websitel www.co.weld.us on 10/30/2018.
Drainage Narrative
For
Quokka Investments Colorado, LLC USR
27385 County Road 66, Gill, CO 80624
Lot B of RECX17-0154 Being Part of the SW '/4 of Section 22,
Township 6N, Range 64 W of the 6`h P.M.
AGPROfessionals
DEVELOPERS OF AGRICULTURE
AGPROfessionals
3050 67th Avenue
Greeley, CO 80634
(970) 535-9318
November 26, 2018
Quokka Investments Colorado, LLC
Ta le of Contents
Certifications 3
Summary 4
Introduction 5
1. Location 5
2. Property Description 5
Historic Drainage
1. Overall Basin Description 6
2. Drainage Patterns Through Property
3. Off -site Drainage Flow Patterns
Drainage Design Criteria 7
1. Development Criteria 7
2. Hydrological Criteria .. 7
Conclusions
List of References
Appendices
OD
11
okka investments Colorado t.[
Certifications
I hereby certify that this drainage narrative for the Quokka Investments Colorado, LLC
proposed USR was prepared under my direct supervision in accordance with the
provisions of the Weld County storm drainage criteria for the owners thereof.
tic
b
n.0
�y 44
TONAL ¶&
�1 r�
Chad TeVelde, P.E.
A PROfe ssionals
Mary Carlson, E.I.T.
11/26/2018
Drainage Narrative Page 3 of 9
AGPROfessionais, 3050 67`h Avenue, Greeley CO 80634 * 970-535-9318 * vvww,agpros.com
Quokka Investments Colorado, LLC
Summary
The project site for the proposed USR R is an agricultural property with an existing
outbuilding. The applicant is proposing parking and a portable office building for a land
remediation business. The site is located in a non -urbanizing region with the proposed
development having less than 10 cubic feet per second (cfs) for the 100 -year, 1 -hour
storm event. Therefore, it is exempt from stormwater detention per Article XII, Storm
Drainage Criteria, Section 23-12-30 Drainage Policy.
F. Exceptions.
1. Exceptions to stormwater detention shall not jeopardize the public
health, safety, and welfare of public and private property and shall be
limited to the following:
No stormwater detention will be required for sites that meet any of
the following conditions. Requirements of the Municipal Separate
Storm Sewer System (MS4) areas remain applicable.
10) NON -URBANIZING areas where the total project
stormwater runoff of less than, or equal to, 10 cfs for the 1
our, 100 -year, storm event.
11/26/2018
Drainage Narrative Page 4 of 9
AGPROfessionals, 3050 67th Avenue, Greeley CO 80634 * 970-535-9318 * www.agpros.com
Quokka Investments Colorado, LLC
Introduction
1. Location
The proposed site is located in part of the SW '/4 of Section 22, T6N, R64W, of the 6th
PM. This site is located approximately one mile south of Highway 392 and north of the
Town of Gill, CO. The properties surrounding the site are undeveloped, agricultural farm
land and oil and gas. The property is bordered on the south side by Weld County Road
(WCR) 66. The nearest road to the east is WCR 57, to the north is Highway 392, and to
the west is WCR 55. A vicinity map is shown in Appendix A.
2. Property Description
The applicant is proposing the development of approximately five acres of the 47.04 -acre
property. The planned improvements include parking and a 720 -square -foot portable
office building to support a land remediation business. There is an existing shop that is
approximately 3,200 square feet and will be used for basic maintenance and storage. The
proposed site is currently a non -urbanizing, agricultural property.
There is one type of soil: Otero sandy loam (1 to 3 percent slopes). The majority of the
soil is well drained, hydrologic soil group A (see USIA -MRCS Custom Soil Resource
Report in Appendix B).
There are no major openchannels within or adjacent to the proposed property.
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Drainage Narrative Page 5 of 9
AGPROfessionals, 3050 67th Avenue, Greeley CO 80634 * 970-535-9318 * www.agpros.com
Quokka Investments Colorado, LLC
Historic Drainage
1. Overall Basin Description
The site has a relatively flat topography with slopes ranging from approximately one to
three percent predominately towards the south. The property is on somewhat of a high -
point and stormwater runoff flows to the northeast and the southwest where the high
point splits the property. A topographic map was downloaded from the United States
Geological Survey (USGS) website and is shown in Appendix C. Historically, there have
been no previous drainage issues with the property.
A Federal Emergency Management Administration (FEMA) map of the project area is
included in Appendix D. The property is located on panel 08123C1575E 1575E and is not
currently located within a 100 -year floodplain.
2. Drainage Patterns Through Property
The site is located in rural Weld County and is surrounded by undeveloped, agricultural
land. A Master Plan for the site area is not currently available. The site is mostly south
sloping and has a generally flat topography. Historically, the basin drainage ultimately
flows towards the South Platte River.
3. Off -site Drainage Flow Patterns
Offsite flows from the north should continue to flow northeast away from the site. Offsite
flows from the west and south should continue to flow southwest. Offsite flows from the
east should continue to flow towards the east. Therefore, an increase due to offsite flows
is not expected.
1 P26/2018
Drainage Narrative Page 6 of 9
AGPROfessionals, 3050 67th Avenue, Greeley CO 80634 * 970-535-9318 * www.agpros.com
Quokka Investments Colorado, LLC
Drainage Design Criteria
1. Development Criteria
The proposed runoff calculation was determined using the criteria set forth in the Urban
Drainage and Flood Control District (UDFCD) Volumes 1, 2 and 3 and the Weld County
Engineering and Construction Guidelines (WCECG) manual.
2. Hydrological Criteria
From NOAA Atlas 14 Gill, CO precipitation station, the estimated rainfall from the 100 -
year, 1 -hour precipitation is 2.68 inches (see NOAA Atlas 14 Precipitation Data in
Appendix E). This value was used for runoff calculations.
Percentage of imperviousness was determined using the recommended values from
UDFCD Table 6-3. The overall percentage of imperviousness for the proposed site was
determined to be approximately 15 percent (see Percentage of Imperviousness
Calculation in Appendix F).
Using the 100 -year, 1 -hour design storm and the UDFCD Detention Basin spreadsheet,
the peak runoff flowrate was estimated using the Modified FAA method. The peak runoff
flowrate was calculated using the time of concentration, runoff coefficient, and the
precipitation depth in the UDFCD spreadsheet (see UDFCD Runoff Calculation in
Appendix C). The peak runoff flowrate was determined to be approximately 9.33 cubic
feet per second (cfs).
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Drainage Narrative Page 7 of 9
AGPROfessionals, 3050 67th Avenue, Greeley CO 80634 * 970-535-9318 * www.agpros.com
Quokka Investments Colorado, LLC
Conclusions
This drainage narrative is consistent with the Weld County Engineering and Construction
Guidelines. An increased risk of damage from storm runoff is not expected since the site
is located in a non -urbanizing region with the proposed development having less than 10
cfs for the 100 -year, 1 -hour storm event. We recommend that the site be exempt from
stormwater detention per Article XII, Storm Drainage Criteria, Section 23-12-30
Drainage Policy.
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Drainage Narrative Page 8 of 9
AGPROfessionals, 3050 67th Avenue, Greeley CO 80634 * 970-535-9318 * www.agpros.com
Quokka Investments Colorado, LLC
List of References
Federal Emergency Management Agency. "FEMA Flood Map Service Center." FEMA
Flood Map Service Center. FEMA, 20 Jan. 2016. Web. 14 Nov. 2018.
<https://Insc.fema.govlportal>.
United States Department of Agriculture - Natural Resources Conservation Service.
"Web Soil Survey." Web Soil Survey. USDA - NRCS, 2006. Web. 14 Nov. 2018.
<http://websoilsurvey.sc.egov.usda.gov/App/ eb oil urvey.aspx>.
United States Department of Commerce - National Oceanic and Atmospheric
Administration. "NOAA's National. Weather Service:" Point Precipitation Frequency
Estimates. USDC - NOAA National Weather Service. Web. 14 Nov. 2018.
<https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=40.4645&loll-
104.5393 &data=depths units=english&series=pds>..
United States Geological Survey. "Maps." Overview - Maps, United States Geological
Survey. USGS, 2016. Web. 14 Nov. 2018.<www.usgs.govlproductslmaps/top►o-maps>.
Urban Drainage and Flood Control District. Detention Basin Volume Estimating
Workbook. Computer software. Software. Vers. 2.34. <http://udfcd.org/software>.
Urban Drainage and Flood Control District. "Urban Storm Drainage Criteria Manual
Volumes 1." USDCM: Volume 1 Management, Hydrology and Hydraulics. UDFCD,
Mar. 2017. Web. 14 Nov. 2018. <http:/ludfcd.org/volume-one>.
Weld County. "Property Portal - Map Search." Property Portal - Map Search. Weld
County, 19 Dec. 2017. Web. 14 Nov. 2018.
<https://www.co.weld.co.usimaps/propertyportalnacct=R8952931>.
Weld County. "Weld County Engineering and Construction Criteria Guidelines." Weld
County Engineering, July 2017. Web. 14 Nov. 2018.
<www.weldgov.com/UserFiles/Servers/Server 6/File/Departments/Public%20Wor: s/En
gineering/ CE G%20-%208-3-1 ?.pdf.>
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Drainage Narrative Page 9 of 9
AGPROfessionals, 3050 67th Avenue, Greeley CO 80634 * 970-535-9318 * www.agpros.com
Quokka Investments Colorado, LLC
Appendices
A. Vicinity Map
B. USDA-NRCS Custom Soil Resource Report
C. USGS G S Topographic Map
D. FEMA Floodplain Map
E. NOAA Atlas 14 Precipitation Data
F. Percentage of Imperviousness Calculation
G. UDFCD Runoff Calculation
Quokka Investments Colorado, LLC
APPENDIX A
Vicinity Map
WELD
COUNTY
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LINE MAPPINC
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Quokka Investments Colorado, LLC
APPENDIX B
USDA-CUSDA-NRCS Custom Soil Resource Report
USDA United States
=�"-- Department of
— Agriculture
ARCS
Natural
Resources
Conservation
Service
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Weld County,
Colorado,
Southern Part
November 14, 2018
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nres.usda.gavlwpsl
portal/n reslm ain /so i l sf health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.govllacatorlapp?agency=arcs) or your N RCS State Soil
Scientist (http://www. nres.0 sda.gov/wps/portal/nresfd etail/soils/contactu sl?
cid=nres142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the N RCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface 2
How Soil Surveys A►re Made 5
Soil Map 8
Soil Map 9
Legend 10
Map Unit Legend 11
Map Unit Descriptions 11
Weld County, Colorado, Southern Part 13
51 Otero sandy loam, 1 to 3 percent slopes 13
References 15
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil -vegetation -landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
Custom Soil Resource Report
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil -landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil -landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field -observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
6
Custom Soil Resource Report
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
40° 27rN
1
1040 32' 25" W
P 40° 27 50 N 3 ,
5389
70
538990
539010
Custom Soil Resource Report
Soil Map
539030
Soil Map may not be valid at this scale.
538970
in
ry
Crit N
538990
539010
539050
VI
539030 539050
Map Scale: 1:1,080 if printed on A portrait (83' x 11") shed.
15 30
60
539070
539070
Meters
90
Feet
0 50 100 200 300
Map p --lion : Web Mercator Corner °ordinates : WGSS4 Edge tics: UTM Zone 13N WGSS4
9
539090
539090
539110
539110
1040 32' 18" W
539130
i
1
40° 2758°N
40° 27 50" N
Custom Soil Resource Report
MAP LEGEND
Area of Interest (AOI)
Area of Interest (AOl)
Soils
O
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
tv Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
.74
4:4 74
0
O
V
a i
•
90
0
324
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
MAP INFORMATION
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale..
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Weld County, Colorado, Southern Part
Survey Area Data: Version 17, Sep 10, 2018
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date (s) aerial images were photographed: Oct 22, 2014 Oct 2,
2017
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
10
Custom Soil Resource Report
Map Unit Legend
Map Unit Symbol
Map Unit Name
Acres in Aol
Percent of AOI
51
Otero
sandy learn,
percent slopes
1 to 3
5.0
100.0°0
Totals for Area of Interest
5.0
100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
u p of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
n on contrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
u sefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
11
Custom Soil Resource Report
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha -Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha -Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually► but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
12
Custom Soil Resource Report
Weld County, Colorado, Southern Part
51 Otero sandy loam, I to 3 percent slopes
Map Unit Setting
National map unit symbol: 3630
Elevation: 41700 to 5,250 feet
Mean annual precipitation: 12 to 15 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period: 130 to 180 days
Farmland classification: Prime farmland if irrigated and the product of I (soil
erodibility) x C (climate factor) does not exceed 60
Map Unit Composition
Otero and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transacts of the mapunit.
Description of Otero
Setting
Landform: Plains
Down slope shape: Linear
Across -slope shape: Linear
Parent material: Eolian deposits and/or mixed outwash
Typical profile
H1 - 0 to 12 inches: sandy loam
1-12 - 12 to 60 inches: fine sandy loam
Properties and qualities
Slope: 1 to 3 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to
high (0.57 to 5.95 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of podding: None
Calcium carbonate, maximum in profile: 10 percent
salinity; maximum in profile: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm)
Available water storage in profile: Moderate (about 7.7 inches)
interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (non irrigated): 4e
Hydrologic Soil Group: A
Ecological site: Sandy Plains (R067BY024CO)
Hydric soil rating: No
Minor Components
Kim
Percent of map unit: 10 percent
Hydric soil rating: No
13
Custom Soil Resource Report
Vona
Percent of map unit: 5 percent
Hydric soil rating: No
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal!
nres/detail/national/soils/?cid=nres142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www. nres. usd a.gov/wps/portal/nres/detail/national/soils/?cid=nres 142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www. nres. usd a.gov/wps/portal/nres/detail/national/soils/?cid=n res 142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/
home/?cid=nres 142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/
detail/national/land use/rang ep astu re/?cid = stel p rd b 10430 84
15
Custom Soil Resource Report
UnitedStates Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430 -VI. http://www.nrcs.usda.goviwpsiportali
arcs/d etai llsoils/scientists/?cid = nres l 42 p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nres.usda.goviwpslportal/nres/detailinationallsoils/?
cid=nrcs142p2_053624
res 142 p2_6 63624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nrcs.usda.gov/InternetiFSE DOCU M ENTS/n res 142p2_662290. pd f
16
Quokka Investments Colorado, LLC
APPENDIX
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Approximate Location
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Quokka Investments Colorado, LLC
APPENDIX D
FEMA Floodplain Map
National Flood Hazard Layer FIRMette
Legere!
40'28'0.02"N
40'27'88.65"N
0 250 500
1,000
1,500
TGN R64 S22
JJ
�1.
08123 C1515 E
011 41110 /2016
Feet
2,000
1:6,000
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
SPECIAL FLOOD
HAZARD AREAS
Without Base Flood Elevation (BFE)
Zone A, 1/, 499
With BFE or Depth Zone AE, 40, AN, VF, AR
Regulatory Floodway
OTHER AREAS OF
FLOOD HAZARD
OTHER AREAS
GENERAL
STRUCTURES
OTHER
FEATURES
MAP PANELS
NO SCREEN
II II III
20.2
0.2% Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mile
Future Conditions 1% Annual
Chance Flood Hazard Zone x
Area with Reduced Flood Risk due to
Levee. See Notes. Zone x
Area with Flood Risk due to Leveezone o
Area of Minimal Flood Hazard zone
Effective LOMRs
Area of Undetermined Flood Hazard Zone a
Channel, Culvert, or Storm Sewer
Levee, Dike, or Floodwall
Cross Sections with 1% Annual Chance
17.5 Water Surface Elevation
Coastal Transect
Base Flood Elevation Line (BFE)
Limit of Study
Jurisdiction Boundary
--- --- Coastal Transect Baseline
Profile Baseline
Hydrographic Feature
Digital Data Available
No Digital Data Available
Unmapped
The pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA. This map
was exported on 11/14/2018 at 2:58:50 PM and does not
reflect changes or amendments subsequent to this date and
time. The NFHL and effective information may change or
become superseded by new data over time.
This map image is void if the one or more of the following map
elements do not appear basemap imagery, flood zone labels,
legend. scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date. Map images for
unmapped and unmodernized areas cannot be used for
regulatory purposes.
Quokka Investments Colorado, LLC
APPENDIX E
NOAA Atlas 14 Precipitation Data
Precipitation Frequency Data Server https://hdsc.nws.nc aa.gov/hdsc/pfds/pf t_ rint age.html` lat=40.46...
NOAA Atlas 14, Volume 8, Version 2
Location name: Gill, Colorado, USA*
Latitude: 40.4645°, Longitude: -104.5393°
Elevation: 4735.13 ft**
* source: ESRI Maps
*I source: USES
POINT PRECIPITATION FREQUENCY ESTIMATES
Sanja Perica, Deborah Martin, Sandra Pavlovic, Ishani Roy, Michael St. Laurent, CarlTrypaluk, Date
Unruh, Michael Yekta, Geoffery 8onnin
NOAA, National Weather Service, Silver Spring, Maryland
PF_tabular PF graphical J Maps_& aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1
Duration
Average recurrence interval (years)
5 -min
0.245
(0.199-0.305)
0.296
(0.240-0.368)
10 -min
0.359
(0.292-0.446)
I 0.434
(0.352-0.539)
15 -min
0.438 0.529
(0.356-0.544) (0.429-0.658)
0.591
30 -min
I (0.480-0.733) 60 -min 0.736
(0.597-0.913)
2 -hr I 0.0.881 08)
3 -hr
0.965
(0.793-1.18)
0.773
(0.578-0.886)
0.713
0.877
(0.711-1.09)
1.04
(0.850-1.28)
1.13
(0.926-1.38)
6 -hr
1.10
(0.909-1.33)
1.30
(1.08-1.58)
12 -hr
1.27
(1.OB-1.3)
24 -hr
2 -day
3 -day
1.51 [
(1.27-1.80)
1.74
(1.48-2.06)
1.91
(1.63-2.24)
1.52
(1.27-1.83)
1.77
(1.49-2.11)
2.04
(1.73-2.40)
2.20
(1.88-2.59J
4 -dad
04
(1.75-2.38)
2.34
(2.00-2.74)
7 -day
2.31
(1.99-2.68)
AFC—layI (2s,-2.sa)
20-dayJ
30 -day
45-daY
6o_dayJ
3.27
(2.86-3.74)
2.68
(2.31-3.11)
2.96
(2.67-3.43)
3.76
(3.29-4.31)
3.86 4.41
(3.39-4.39) (3.87-5.03)
I 1�
0.392
(0.317-0489)
0.483
(0.388-0.605)
0.574
(0.464-0.716)
0.708
(0.568-0.886)
0.700
(0.566-0.873)
0.943
(0.761-1.18)
0.863
(0.692-1.08)
1.15
(0.930-1.44)
1.47
(1.20-1.80)
I
1.70
(1.40-2.07)
1.98
(1.64-2.38)
2.25
(1.88-2.68)
2.56
(2.16-3.03)
2.73
(2.32-3.21)
1.16
(0.932-1.46)
1.42
1.14-1.78
1.69
1.36-2.09
1.81
(1.47-2.24)
25
0.626
(0.490-0.834)
0.917
(0.717-1.22)
i
1.12
(0.874-1.49)
il
1.34
(1.01-1.80)
1.51
(1.18-2.01)
1.80
(1..36-2.42)
1.86
(1.46-2.49)
2.21
(1.76-2.96)
2.39
[(1.92-3.19)
2.25
(1.70-3.03)
2.69
(2.06-3.61)
2.10 2.74
(1.72-2.57) (2.20-3.59)
2.41
(1.99-2.92)
2.69
(2.24-3.23)
3.03
(2.55-3.61)
3.20
,2.70-3.79)
12.87
22.45-3.37)
3.29
(2.83-3.84)
3.65
(3.15-4.23)
4.56
(3.97-5.24)
5.30
(4.63-6.05)
4.58 5.23 6.26
(4.04-5.18) (4.61-5.92 (5.50-7.11)
3.36
(2.84-3.96)
3.07
(248-3.95)
3.38
(2.74-4.28)
3.74
(3.05-4.67)
2.92
(2.25-3.91)
3.31
(2.57-4.36)
100
i
0.750 � 0.885
(0.567-1.01) (0.641-1.22)
1.10 1.30
(0.830-1.48) (0.939-1..79)
1.58 I
(1.15-2.18)
2.13
(1.55-2.94)
I. 2.68
(1.95-3.70)
3.22
2.37-4.43)
3.65
(2.8.73)
3.96
(3.12-5.08)
4.33
(3.43-548)
3.92 4.51
(3.21-4.86) (3.60-5.68)
4.08 II_4.68
(3.35-5.04) (3.74-5.85)
3.83 4.59
(3.26-4.48) (3.78-5.58)
4.22
(3.62-4.02)
5.21
(4.50-6.01)
6.01
(5.23-6.90)
5.02
(4.14-6.04)
6.08
(5.05-7.22)
5.20 I
(4.17-6.41)
5.64
(4.64-6.80)
i
6.74
(5.47-8.13)
3.52
(2.60-4.81)
3.94 I
(2.93-5.33)
4.27
(3.20-5.69)
4.60
(3.47-6.05)
4.97
(3.78-6.45)
5.16
(3.95-6.65)
5.32
(4.09-6.83)
5.83
(4.50-7.38)
6.26
(4.85-7.86)
7.39
(5.77-9.15)
200
1.52
(1.04-2.15)
1.85
(1.27-2.62)
2.49
(1.72-3.53)
3.16
(2.18-4.49)
3.82
(2.67-5.40)
500
L _
1000
1.25
(0.823-1.82)
1.83
(1.21-2.67)
L2.23
(1.47-3.25)
3.02
(1.99-4.39)
3.86
(2.55-5.64)
4.71
(3.14-6.82)
1.43
(0.906-2.09)
2.09
(1.33-3.06)
2.55
(1.62-3.73)
3.45
(2.19-5.04}
4.45
(2.82-6.51)
5.45
(3.49-7.90)
4.19 5.19
(2.95-5.89) (3.48-7.48)
4.65 I
(3.30-6.46)
4.96
(3.54-6.79)
5.30
5.65
(4.10-7.55)
5.85
(4.27-7.76)
6.01
(4.41-7.94)
6.48
(4.78-8.45)
6.90
(5.10-8.81)
8.04
(6.00-10.2)
6.97 1 7.68 8.37 N 9.05
(5.81-8.21) (6.26-9.20) (6.57-10.3) (6.79-11.5)
7.08 � 8.16 � 8.95 I 9.71 f 10.4
(6.19-8.08) (6.84-9.54) (7.33-10.6) (7.66-11.8) (7.87-13.1)
8.03 9.24it_ 10.1 10.9 11.7
(7.05-9.13) (7.76-10.7) [�8.30-12.0) I (8.65-13.3) (8.86-14.6)
5.16 5.92 7.10
(4.58-5.82) (5.24-6.68) j (6.27-8.03)
5.70
(3.85-8.11)
5.95
(4.06-8.37)
6.30
(4.34-8.76)
6.62
(4.60-9.09)
6.83
(4.77-9.32)
6.99
(4.90-9.49)
7.38
(5.21-9.91)
7.75
(5.49-10.3)
8.87
(6.34-11.7)
9.92
(7.13-12.9)
.]
6.03
(3.89-8.69)
6.56
(4.27-9.37)
6.77
(4.4S-9.58}
7.12
(4.73-9.97)
7.40
(4.97-10.3)
7.62
(5.15-10.5)
7.77
[(5.28-10.7)
8.09
(5.54-11.0)
8.40
(5.78-11.4)
9.49
(6.61-12.7)
10.5
(7.39-14.1)
11.4 12.0
(8.21-14.7) (8.47-15.9)
12.7 13.3
(9.19-16.3) (9.43-17.6)
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
(for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper
bounds are not checked against probable maximum precipitation (PMP) estimates and maybe higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical
1cif4 11/14/18,12:44 PM
Precipitation Frequency Data Server
h ttps : //hdsc .nws .noaa.gov1hdsc/pfds/pf s_ rint age.html` lat='0.4 ...
Precipitation depth (in)
C
F recipitntiDn depth (in)
PDS-based depth -duration -frequency (DDF) c u rues
Latitude: 40.4645°, Longitude: -104.5393°
2
5 10
25 50 100
200
NOAA Atlas 14. Volume Bs. Version 2
C
8
.c .c
r
Duration
.c
i
nj ry co
TO er:1
r ID rZ
-O -O it
I I I I I I II
IN n TT N. O O tai Ln O
R--! n4 rn f
500 1000
Average recurrence interval (years)
Created (GMT): wed P4ov 14 19.43.33 2018
Back to Top
Maps & aerials
Small scale terrain
Average recurrence
interval
(years)
1
2
d
10
25
50
100
200
500
1000
Duration
5 -min 2 -day
1 ern — 3 -day
15 -min 4-d ay
30 -mire 7 -clay
604rin - 10 -day
20 -day
3 -hr - 3(1 -day
6-ni — 45 -clay
12-h r 60 -day
24-h.r
2of4 11/14/18,12:44 P
Precipitation Frequency Data Server https://hdsc.nws.noaa.gov/hdsc/pfds/pf t_ rint age.html` lat=40.46...
Large scale aerial
3km
I
2rni
If
Large scale terrain
Large scale map
Ch eririe
Fort Coffins
n.
O I
Longmont
0
founder
3of4 11/14/18, 12:44P
Precipitation Frequency Data Server https://hdsc.nws.noaa.govlhdsc/pfds/pfds_printpage.htmPlat=40.46...
Back to Top
US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Water Center
1325 East West High way
Silver Spring, MD 20910
Questions?: HDSC.Questionsnoaa.gov
Disclaimer
4 of 4 11/14/18, 12:44 PM
Quokka Investments Colorado, LLC
APPENDIX F
Percentage of Imperviousness Calculation
AGPROfessionais
DEVFI.OPERS OF AGRICULTURE
Project Number: 2356-01
Date: 11/14/18 1:08 PM
3050 67th Avenue, Suite 200
Greeley, CO 80634
Telephone (970) 535-9318
www.agpros.com
Designed By: AGPROfessionals
Checked By: CTV
Sheet: of
Subject: Quokka Investments Colorado, LLC Proposed Site
= User Entry
Solving for the Percent Impervious (I):
Description per UDFCD
Table
6-3
% Impervious
Total
SgFt
Acres Impervious
Roofs
90%
3,920
0.08
Gravel
Road
40%
65,000
0.60
Greenbelts
2%
148,880
0.07
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0.00
None
0%
0
0.00
Square Feet
217,800
Acres
Total
Impervious
Acres
32,506
0.75
Total
Development Acres
217,800
5.00
a75
Development
%I
Actual
Design
15%
Quokka Investments Colorado, LLC
APPENDIX G
UDFCD Runoff Calculation
DETENTION VOLUME BY THE MODIFIED FAA METHOD
Project: Quokka Investments Colorado, LLC
Basin 1D: Proposed Site Runoff
(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
Design Information (Input):
Catchment Drainage Imperviousness
Catchment Drainage Area
Predevelopment NRCS Soil Group
Return Period for Detention Control
Time of Concentration of Watershed
Allowable Unit Release Rate
One -hour Precipitation
Design Rainfall IDF Formula i = CI* PAC24-V't3
Coefficient One
Coefficient Two
Coefficient Three
la=
A=
Type =
T
Tc =
q_
RI=
=
C2=
C3=
15.00
5
A
10
14
0.00
1.42
28.50
10
0.789
percent
acres
A, B, C, or D
years (2, 5, 10, 25, 50, or 100)
minutes
cfsla cre
inches
Determination of Average Outflow from the Basin (Calculated):
Runoff Coefficient
Inflow Peak Runoff
Allowable Peak Outflow Rate
C=
Op -in =
Op -out
0.17
2.80 cfs
0.00 cfs
Design Information (Input):
Catchment Drainage Imperviousness
Catchment Drainage Area
Predevelopment NRCS Soil Group
Return Period for Detention Control
Time of Concentration of Watershed
Allowable Unit Release Rate
One -hour Precipitation
Design Rainfall IDF Formula i = C1"` Pif{'C2+TerCa
Coefficient One
Coefficient Two
Coefficient Three
A=
Type =
T=
Tc =
g=
P1=
O1_
O2_
15.00
5.000
A
100
14
0.00
2.68
28.50
10
O3= 0.789
percent
acres
A, B, C, or D
years (2, 5, 10, 25, 50, or 100)
minutes
cfs/acre
inches
Determination of Average Outflow from the Basin (Calculated):
Runoff Coefficient
Inflow Peak Runoff
Allowable Peak Outflow Rate
C=
Op -in =
Op -out =
0.30
9.33
cfs
0.00 cfs
UDFCD Proposed Runoff.xls, Modified FAA
11/14/18, 2:18 PM
Hello