2002-07-25_REVISION - M1983208

• Permit No: M1983208
• IBM Index Class Name: Revision
• Doc Date: 7/25/2002
• Doc Name: Comments/Extension
• From: Geological Services
• To: DMG
• Type & Sequence: AM1
• Media Type: D
• Archive: No

{3.1.9} Topsoil available at the site shall be salvaged, stockpiled, preserved, and re-used for targeted
reclamation revegetation.
{3.1.10} Re-vegetation topsoiling (as described above in {3.1.9}, and the desirable grass species re-
seeding of the entire site shall be accomplished by the procedures described below in Paragraph 6.4,5(d).
Temporary critical area seeding of topsoil stockpiles shall occur during extraction and process operations.
Reclamation topsoiling and seeding of pit slope banks shall be accomplished progressively during
extraction operations. The Natural Resources Conservation Service recommended list of grass seed species
and procedures shall be used for required post-mining re-vegetation seeding. No tree nor shrub re-
vegetation shall be attempted. Native sage incorporated into the topsoil at the time of the initial site
stripping is expected to cause volunteer black sage re-growth. Obnoxious and toxic weed control shall be
assessed and addressed according to the adopted weed control program.
{3.1.11 } Buildings & Structures -not applicable -- none at the site, other than permitted portable process
equipment assembly and truck scale attendent shack.
{3.1.12 } Signs Bc Markers: (i) Complying Public Notice, (2) Entrance sign, & (3) boundary markers -
to be placed as required
tal Revegetation Specifics: See "Specifications" below.
tel Reclamation Implementation: Revegetation of sideslopes to un-irrigated range
pasture shall be initiated during the month of November for the "dormant seeding" scenerio
(MLRA Designation #35, 6000-f1 elevation). Progressive yazdsite grading shall be maintained in
the worked-out pit floor Most topsoiling and rvegetation of pit sideslopes shall be
progressively accomplished during the mining in a November "dormant seeding" effort.
ttl Reclamation Specifications:
(il Final rg ading
Excavated pit floor areas are to be graded essentially flat; however, the depth of
gravel resource to be mined and the surface of original deposition aze
inconsistent, as would be expected of a typical streambed erosional surface in
Mancos Shale and Dakota Sandstone. The fmished_ floor grading then shall be a
smooth-graded undulating surface rather than a perfectly flat surface.
sideslopes, where the pit floor is not "daylighted to the mesa slope, shall be
excavated and maintained at the specified finished 3:1 grade. "Daylighted" pit
floor edges shall maintain a remnant 3-foot high earthen berm for surface water
retention.
iii) Seeding ~,
The following seed mix recommendation of the Natural Resources Conservation
Service (formerly SCS) shall be used in the sideslope revegetation effort.
,. ~ , _ GRASS SPECIES
crested wheatgrass (Ephaim) 1.8 lb PLS/acre
pubescent wheatgrass (Luna) 3.5 lb "
western wheatgrass (Arriba) 4.0 lb "
alfalfa (I,udak) 0.81b "
small burnet (Delaz) 2.0 lb "
The following seed MRCS-recommended "roadside species" shall be used for
critical area stabilization, such as the protection of temporary topsoil stockpiles,
and permanent steep-sided access road cuts.
GRASS SPECIES
crested wheatgrass (Ephraim) 3.0 Ib PLS/Ac (drill rate)
streambank wheatgrass (Sodaz) 3.0 "
sand dropseed 0.25 "
tall wheatgrass (Jose) 6.0 "
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