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

Soli arW ew+ryicai fine and survey
Fool traits and paths:
Moran: slight.
Cryaquolls: severe- high water table and
saturated soil.
Histosois: severe- high water table and
organic materials.
Revegetation limitations:
Moran: severe- short growing season, low
available water capacity and fow inherent
fertility.
Cryaquolls: severe- short growing season and
high water table.
Histosois: severe- short growing season;
organic material takes thousands of years to
replace.
Revegetation considerations: Cold tolerant
plants are required to survive alpine climate.
Mulch or similar treatment will protect the soi!
from erosion, help conserve soil moisture, and
protect emerging plant seedlings. Revegetating
Cryaquolls soil with riparian vegetation requires
maintaining a high water table. Histosois
revegetation requires high water table and
replacing organic materials.
tMldlffe 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 considerattons:
Management activities require buffer zones to
protect riparian habitat.
Acid precipitation buffering capacity: iovr.
Map Unit: 965A-Moran family, 40 to 65 percent
slopes.
Ecological Land Unit: 965A-alpine grasses,
sedges, and (orbs on alpine mountains.
MAP UNIT SETTINGS
Location: alpine areas where igneous an
metamorphic rocks predominate.
Landfan»: mountains.
Parent maferial: residuum and colluvium.
Geologic symbol: Tmi, Xb, Xfh, Xg, Yg, and Yp.
Elevation range:.11,600 to 13,000 feet.
Aspect: ail.
Climatic zone: 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
85 percent Moran and similar soils.
Contrasting inclusions
10 percent cliffs and talus.
5 percent shallow soils on convex slopes.
TYPICAL PROFILES:
Moran
Surface layer(s):
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, very
cobbly sandy loam.
Substratum layer(s):
32 to 60 inches -tight olive brown, very cobbly
sandy loam.
SOIL PROPERTIES AND QUALITIES
Moran
Effect/ve rooting depth: greater than 20 inches.
Drainage class: somewhat excessively.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: low.
Permeability: moderately rapid.
Runoff: rapid.
VEGETATION
Potential natural communities:
Moran: kobresia/golden avenscudy sedge
{Koury/ACro-Caro) typical site and tufted
hairgrass/golden evens (Dece/Acro) moist site.
Serat stages: dominated by plants ofi the
respective potential natural communities.
Present vegetation: dominated by plants of the
respective potential natural communities.
USE AND MANAGEMENT CONSIDERATIONS
MaJor uses: mining, recreation, scenic vistas,
wildlife habitat, and watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: fow.
Sediment delivery efficiency: high.
Road and trail limitations:
Cut and Trl! slope stability
Moran: slight.
improved unsurfaced roads:
Moran: slight.
Offroad vehicle roads and traits:
Moran: severe- erosion hazard. surface
compaction, and nutting.