2006-12-12_REVISION - M1987028 ‎(2)‎

• Permit No: M1987028
• IBM Index Class Name: Revision
• Doc Date: 12/12/2006
• Doc Name: Conversion Appl
• From: Colorado Marble, L.L.C.
• To: DRMS
• Type & Sequence: CN1
• Media Type: D
• Archive: No

Soil antl ecolx~ical land unit survey
Revegetation limitations:
Moran: moderate- short growing season, low
available water capacity, and low inherent
fertility.
Rock outcrop: severe- cliffs and talus.
Cryaquolls: severe- high wafer table.
Revegetation considerations: Cold tolerant
plants are required to survive alpine climate.
Mulch or similar treatment will protect the soil
from erosion, help conserve soil moisture, and
protect emerging plant seedlings. Revegetating
Cryaquolls soil with riparian vegetation requires
maintaining a high water table.
Wildlife management considerations: This map
unit provides food, shelter, and water to upland
game animals. Where streams occur, this map
unit provides aquatic habitat.
Other management considerations:
Management activities require buffer zones to
protect riparian habitat.
Acid precipitation buffering capacity: moderate
Map Unit: 910R-Moran family -Rubble land -
Teewirot family complex, 5 to 40 percent slepes.
Ecological Land Unit: 910R-alpine grasses,
sedges, and (orbs on alpine mountains.
MAP UNIT SETTIPiGS
Location: alpine areas where igneous an
metamorphic rocks predominate.
Landform: mauntains.
Parent material: residuum and colluvium.
Geologic symbol: Tmi, Xb, Xfh, Xg, and Ya.
Elevation range: 11,600 to 13,500 feet
Aspect: al!.
Climatic zon<_: alpine.
Mean annual precipitation: 30 to 50 inches.
Mean annual aIr temperature: 34°F. to 38°F.
Average annual snowfall: 300 to 500 inches.
COMPOSITION
50 percent Moran and similar soils.
20 percent Rubble land.
20 percent Teewinot and similar soils.
Contresfing inclusions
10 percent soils that lack a dark surface on
exposed, convex slopes.
TYPICAL PROFILES:
Moran
Surface layers}:
0 to 2 inches -dark grayish brown, gravelly
sandy loam.
2 to 10 inches -brown, gravelly sandy loam.
Subsoil layer(s):
10 to 20 inches -yellowish brown, very gravelly
sandy loam.
20 to 32 inches -light yellowish brown, verf
cobbly sandy loam.
Substratum layer(s):
32 to 60 inches -light olive brown, very cobbly
sandy loam.
Teewinot
Surface layer(s):
0 to 4 inches -dark grayish brown, very stony
loam.
4 to 10 inches -brown, very stony loam.
Unweathered bedrock:
10 inches -hard gneiss bedrock.
SOIL PROPERTIES AND QUALITIES
Moran
Effective rooting depth: greater than 20 inches.
Drainage class: somewhat excessively.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: tow.
Permeability: moderately rapid.
Runoff: medium.
Rubble land
Landfonn: talus and felsenmeer on boulder
fields.
Parent material: residuum.
Rock type: igneous and metamorphic.
Runoff: slow.
Teewinot
Effective rooting depth: less than 20 inches.
Drainage class: well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: moderate.
PermeabfJlty: moderate.
Runoff: rapid.
VEGETATION
Potential natural communities:
Moran: kobresia/golden evens-curly sedge
(KomylAcro-Caru) typical site and tufted
hairgrasslgolden evens (DecelAcro) moist site
and kobresiahvhiproot clover (Komy/Trda1
exposed site.
Teewinot: kobresialgolden evens-curly sedge
(KomylAcro-Caro) and tufted hairgrasslgo(den
evens (KomylTrda) and golden avens/dwarf
clover (Acro/Tma).
Serel stages: dominated by plants of the
respective potential natural communities.
Present vegetation: dominated by plants of the
respective potential natural communities.