2005-10-24_REVISION - M1987028

• Permit No: M1987028
• IBM Index Class Name: Revision
• Doc Date: 10/24/2005
• Doc Name: Conv. Appl.
• From: Colorado Marble L.L.C.
• To: DMG
• Type & Sequence: CN1
• Media Type: D
• Archive: No

Soil arW ecabgical 1aM urtd survey
Available water capacity: low.
PentreabiIlly; moderately rapid.
Runoff: rapid.
Rock outcrop
Landform: cliffs and talus.
Panarrt material: residuum and coiluvium.
Rock type: igneous and metamorphic.
Runoff: rapid and slow.
Teewinot
ETfeicdve rooting depth: less than 20 inches.
Drainage class: well.
DepQh to seasons! high water table: greater
than 6 feet
Available water capacity: moderate.
Permeabllfty: moderate.
Runoff: rapid.
VEGETATION
Potertda! natural commuMties:
Moran: kobresiaigokfen avens-curly sedge
(KamylAcro-Caro) iypicaf site and tufted
h2iirgrass/golden avens (DecefAcro) moist site
and kobresiarWhiprootciover (Komyrfrda)
exposed site.
Teewinot: kobresialgolden avens-curry sedge
(Koury/Acrd-Caro) and kobresialwhiproot clover
(Komyffrda) and golden avensidwarf clove
(AcrofTma}.
Seral'stages: dominated by plants of the
respective potential natural communities.
Presrutt vegetabon: dominated by plants of the
respective potential natural communities.
USE .AND MANAGEMENT CONSIDERATIONS
MaJo,ruses: mining, recreation, scenic vistas,
wildlife habitat, and watershed.
Mass movement potential:
Landslides: moderate.
Debris Aows: moderato.
Snow avalanche: moderate.
Sediment delivery etticlency: high.
Road and bail limitations:
Col-and fill slope stability
Moran: severe- sbpe and sandy materials.
Rruk outcrop: slight.
Trrewlnot: slight.
improved unsurfaced roads:
Moran: severe-slope.
Ruck outcrop: severe- slope.
Teewinot: severe-slope.
Of/iroad vehicle roads and trails:
Moran: severe- slope and erosion hazard.
Rock outcrop: severe-tiffs and talus.
7e~ewinot: severe- slope and erosion hazard.
FocR trails and paths:
Moran: moderate- slope.
Rock outcrop: severe-tiffs and talus.
Teewinot: moderate- s~ope-
Revegetation lim/tadons:
Moran: severe- slope, short growing season, law
available water capacity, and low inherent
fertility.
Rock outcrop: severe- bedrock.
Teewinot: severe- slope, shallow depth to
bedrock, short growing season, low available
water capacity, and low inherent fertility.
Revegetation cons/derations: Coitl tolerant
plants are required to survive alpine Gimate.
Mulch or similar treatment will protect the soil
from erosion, help conserve soil moisture, and
protect emerging plant seedlings.
Nrlfd/ffe management considerations: This map
unit provides food and limited shaker during
summer months.
Other management considerations:
Management activities are limited by cold Gimate,
steep sopes, rock outcrop, and erosion hazard.
Alpine plant associations vary from area to area
and are controlled by microsite conditions. This
diversity of plant associations creates a relatively
high degree of biodiversiry on steep alpine
slopes.
Acid precipitation buffering capacity: bw.
Map Unit: 950C-~Aoran family -Gryaquolls -
Histosols complex, 0 to 25 percent slopes.
Ecological Land Unk: 950C--willows, grasses,
forts, and sedges on alpine Grque bottoms.
MAP UNIT SETTINGS
Location: alpine areas where igneous an
metamorphic rocks predominate.
Landform: cirque bottoms.
Parartt material: alluvium.
Geologic symbol: Da and Qd.
Elevation range: 71,600 to 13,000 feet.
Aspect: all.
Climatic zone: alpine.
Mean a»nuai precipitation: 30 to 50 inches.
Mean annual air temperature: 34°F. to 38°F.
Average annual snowlatl: 300 to 500 inches.
COMPOSITION
30 percent Moran and similar soils.
30 percent Gryaquolls and similar soils.
25 percent Hisbosots and similar soils.
Contrasting inclusions
t 0 percent other wet soils that lack development
or a dark surface.
5 percent exposed, ice scoured bedrock.