HomeMy WebLinkAbout20062324 West Adams Soli Conservation District
60 S. 27th Avenue-Brighton, CO 80601 -Phone 659-7004
January 21, 2004
CASE NUMBER: USR-I458
PROJECT: Site Specific Development Plan and Special Review Permit for Use by Special Review(Oil
& Gas Support& Services)
PLANNER: Jacqueline Hatch
NRCS REPESENTATIVE: Gene Backhaus, Acting District Conservationist
In consultation with the Natural Resources Conservation Service (MRCS), we have reviewed the above
referenced case and have the following comments:
SOILS/LIMITATIONS: The two proposed commercial building parcels are located on Altvan loam
(I) soil. For building foundations with or without basements, Altvan soil has moderate limitations due to
its shrink-swell potential.
For sanitary septic system absorption fields, the Altvan soil has slight limitations.
PRIME FARMLANDS: When irrigated, the Altvan soil is considered 'prime farmland'.
SOIL EROSION POTENTIAL: Altvan soil has moderate potential for wind erosion and should be
protected. Appropriate measures should be taken to minimize wind soil erosion during future
construction activities, such as avoiding disturbances to large areas and preventing soils from moving
offsite. At the conclusion of construction activities, disturbed areas should be stabilized with perennial
vegetation, gravel or asphalt.
The application does not address re-vegetation of the two runoff detention areas on the north and south
parcels. These areas should be re-vegetated immediately following completion,or as appropriate
depending on weather and season. Our recommendation for seeding the runoff detention areas as soon as
possible is based on soil erosion,both from a wind and water standpoint, as well as from a weed
standpoint. Weeds are very invasive and move into disturbed areas quickly. Some of these can be
noxious weeds and would require control based on the state noxious weed list. By seeding the runoff
detention areas, the chances for weed invasion will be lessened, as will the potential for erosion.
The following seed mix and application rates are recommended for re-vegetation and are based on NRCS
"critical area" seeding rates, which are double our normal rates.
SPECIES VARIETY PERCENT OF NRCS RATE NRCS
MIX RECOMMENDED
RATE
Western Arriba 40 16.0#/ac 6.4#PLS/ac.
Wheatgrass
Side Oats Vaughn 25 9.0 #/ac. 2.3 #PLS/ac.
•
Grama
Blue Gratis Hechita 20 3.0 #/ac. 0.6#PL ac.
Alkali Sacaton Salado 15 1.5 #/ac. 0.2 #PLS/ac.
CONSERVATION - DEVELOPMENT - SELF-GOVERNMENT
2006-2324
•
Our normal recommended seeding dates are November l' through April 15th. All seeding should take
place on unfrozen soils. A good quality seed drill with an agitator and press wheels is recommended. If
seed is broadcast, the above recommended rates would be doubled.
We recommend mulching with clean weed free straw or native hay. Mulch should be applied at a rate of
4,000 pounds per acre. After the mulch is applied, it should be 'crimped' into the soil to help anchor it.
Crimping should be cross slope or on the contour, if at all possible. The State of Colorado has a list of
certified weed-free straw available on the intemet or through the local county Extension Service office.
The water runoff detention areas are shown with side slopes of 2:1, such a steep slope can make the
planting and establishment of cover vegetation difficult. It is recommended that these areas have a 4:1
slope to allow the planting, establishment and maintenance of cover vegetation.
OTHER: When areas are disturbed;weed infestation can become a problem. Should this occur, the
applicant can contact Kelly Uhing, Vegetation Weed Management Specialist with Adams County at (303)
637-8100 to develop a weed management plan.
The District welcomes the opportunity to review and comment on proposals such as this. Conservation
and wise use of our natural resources are foremost in our goals and objectives. We look forward to
working with you in the future. If you or the applicant should have any questions, feel free to contact the
NRCS representative at 303-659-7004.
ely,
District Board of Supervisors d
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