PERMFILE128001

• Permit No: M1990143
• IBM Index Class Name: Permit File
• Doc Date: 12/4/1990
• From: DEPT OF THE ARMY
• To: MLRD
• Media Type: D
• Archive: No

stable, interception of groundwater
drainage of the area either during
presents no apparent problem. The
impact prime or important farmland.
levels is not anticipated, and
pit operation or after reclamation
proposed gravel pit site does not
Other considerations of general concern regarding reclamation of the
site include:
1) On the attached from CO_ECS_-2 are provided estimated
understory plant composition percentages and current production of
the existing understory vegetation, based upon on-site inventory of
these factors as of Nov. 21, 19953. This form provides an indication
of the site's current vegetation condition (prior to disturbance) and
composition and also an indication of revegetation/reclamation
potential. As noted on form CO-ECS-2, the site's current ecological
condition is fair, relative to rangeland productivity and
composition.
2) Average depth of good quality, friable topsoil at the
proposed pit site may average less than two inches. All topsoil
present should be saved where feasible and stockpiled in an easily
accessible area. Natural topsoil depth in the area will be minimal
on steeper slopes and ridge tops. Additional topsoil may be needed
to supplement native topsoil removed and stockpiled. If the
stockpiled topsoil is to be stored for an extended period of time
(longer than one year), it should be reseeded as per the seeding
recommendation attached (and explained below). Please refer to
Colorado Standard and Specification No. 544, "Land Reconstruction,
Currently Mined Land" (attached) for additional guidelines and
recommendations regarding proper topsoiling techniques.
3) Seedbed preparation, since most <if not all) of the site to
be seeded will be roadbeds, other travelled and compacted areas, fill
material backslopes, etc., should include several factors:
a) If the area is highly compacted from machinery traffic,
the area should be tilled, ripped, or deep-chiseled down to a depth
of at least one foot, and more preferably 2-3 feet. This will break-
up "hardpan" layers and permit greater water infiltration and root
penetration to deeper soil layers. After such renovation, the area
should be disked, rolled or dragged, and mildly compacted to provide
a smooth, relatively firm seedbed. The seedbed should be well
settled, yet friable enough to permit placement of seed at the
recommended seed depth. Optimum firmness is when approximately a
one-half inch deep boot print is left after walking across the
prepared soil surface.
b) The seedbed should be as rock and weed-free as
possible. If heavy weed invasion has already occurred on the site(s)
to be seeded, pre-plant or pre-emergence weed control should be done,
as per recommendations from the Soil Conservation Service (SCS).
This weed control should continue as needed until the seeding is
fully established and relatively free of further heavy weed invasion
and competition. Any follow-up weed control (i.e. post-emerge on