REV106988

• Permit No: M1974086
• IBM Index Class Name: Revision
• Doc Date: 11/14/1994
• Doc Name: SEEDING RECOMMENDATIONS FOR RALSTON QUARRY
• From: US SOIL CONSERVATION SERVICE
• To: ASPHALT PAVING CO
• Type & Sequence: AM2
• Media Type: D
• Archive: No

,Inited estates 5~ III Ililllililliiill - M~o Dffice
OPpartment of Conservation 999 :655 Parfet, Room E-300
Agriculture JeCV1CP. ~ Lakewood, CO 80215-5517
r Phone: [phone].
FAX: [phone]
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- Serving Arapa6ae, Clear Creek, Denver, Cilpin 6 Jefferson Coonli?; -
DATE: November 14, 1994
TO: Jeff Keller, Vice-President, Asphalt Paving Co.
FROM: Gary Finstad, Metro Conservationist Q,,,/,'~ -
~~iy ~~
I'''l\•~
RR: SRF,DING RRCOp11yENDATIONS FOR RALSTON nrJARRY
Ralow is a sugge:;ted seediny rnix for the "tri+ll reclnmatinn nrr•.,."
Only r:at.ives are proposed. The varieties. sp~r:iFied are sunerio~ Cn.
adaptability to this geographic reyinn. Seeding rates are expressed
as "pounds of pure live seed (P1,S) per acre," which is the only basis
for comparing price and quality of different sources of hulk seE:d-
Broadc:ast. seeding will deliver approximately 75 to 80 live sends per
square foot, apportioned according to the percentages in the mix. The
percentages r..flect "numbers of live seed," therefore, not. "uei~]ht."
This will prove to be a challenging prnjer.t, even with the relatively
short slope lengl.hs planned for the demonstration area. It will be
important to achieve soil coverage (about 1/4 inr•h) of as much ;ert~l as
possible to optimize the rate of seed yermination and subsequent.
seedling establishment. Note: Hydraulic applir:atiorc of sE:Pd will not
prove satisfactory if not followed by some method of soil manipulation
to cover some of the seed. Hydraulic application of a mulch over
unincorporated seed will not be sufficient.
It's important. to observe the appropriate seeding window, as well.
Conl.rary 'to the information in the existing plan, the best time to
giant a nonirrigat.ed native grass mix is between late Or.tober and the
end of April--anytime the soil is not frozen or wet--as long as the
site is stable. A fall seeding is made after a hard freeze, thereby
preventing germination. This is referred to as a "dormant ser•di.ny."
This is preFerred in mist cns•~s to ;~ spring sPed~ng, all r.hinys being
P. (111 a 1. .
S[•Prj,+y
western wheatgrass
little bluestem
sidenat.s grama
bluebunrh wbaatgrass
ind(an ricegrass
slender wbeat9rass
variety Percent
of Mix
Arriba 30
Pastura 20
Vaughn 20
Secar l0
Nezpar ]0
Primar/San Luis 10
TOTAL: ]00'a
Pounds PT,S/Acre
(8roadr•.ast Plantin
9.60
2.80
3.60
2.80
2.50
7..20
23.50 lbs./Ac.
-,
cc: Karen Hellner, Jefferson County Planning Department