2011-04-08_REVISION - M1983011 ‎(6)‎

• Permit No: M1983011
• IBM Index Class Name: REVISION
• Doc Date: 4/8/2011
• Doc Name: Conversion application ‎(CN-01)‎ to a 112
• From: Mt. Elbert Mining Co., LLC
• To: DRMS
• Type & Sequence: CN1
• Email Name: DMC
• Media Type: D
• Archive: No

Northern San Isabel and Western Pike National Forests, Colorado
Offroad vehicle roads and trails:
Leighcan: moderate- cobbles, stones and
boulders.
Foot trails and paths:
Leighcan: slight.
Revegetation limitations:
Leighcan: moderate- low available water
capacity and low inherent fertility.
Revegetation considerations: Mulch or similar
treatment will protect the soil from erosion, help
conserve soil moisture, and protect emerging
plant seedlings.
Timber management considerations:
Reforestation is limited by extremely stony soil
surfaces and moderately steep slopes. Timber
management activities which create small
openings in overstory vegetation canopy cover
can stimulate understory vegetation and increase
the amount of herbage and browse for wildlife.
Trees to plant include Engelmann spruce,
subalpine fir, and lodgepole pine.
Wildlife management considerations: This map
unit provides shelter and limited food during
summer through fall months. Thinning or
creating small openings in the overstory canopy
cover can stimulate understory productivity.
Other management considerations: Some
areas of this map unit occur in generally remote
areas which have had relatively little disturbance
other than fire. These undisturbed areas can
contain old growth trees. Small areas of this map
unit occur below 10,000 feet. The soil is formed
in valley fill. Vegetation includes ponderosa pine,
white fir, Douglas-fir, Arizona fescue, sedge, and
Rocky Mountain Whortleberry.
Acid precipitation buffering capacity: low.
Map Unit: 612G-Taglake family, 5 to 40 percent
slopes.
Ecological Land Unit: 612G-lodgepole pine,
subalpine fir, and Engelmann spruce on montane
and subalpine ground and lateral moraines.
MAP UNIT SETTINGS
Location: glaciated parts of the survey area
where sedimentary rocks predominate.
Landform: ground and lateral moraines.
Parent material: glacial till.
Geologic symbol: Qd.
Elevation range: 9, 000 to 11, 000 feet.
Aspect: all.
Climatic zone: montane and subalpine.
Mean annual precipitation: 20 to 40 inches.
Mean annual air temperature: 340F. to 440F.
Average annual snowfall- 200 to 400 inches.
COMPOSITION
85 percent Taglake and similar soils.
Contrasting inclusions
8 percent Cryaquolls along stream drainages and
seeps.
5 percent rubbly glacial debris.
2 percent soils that lack development.
TYPICAL PROFILES:
Taglake
Surface covering layer:
1 to 0 inches - conifer litter and duff.
Surface layer(s):
0 to 4 inches - pale brown, extremely stony
sandy loam.
Subsoil layer(s):
4 to 17 inches - brown, extremely stony sandy
loam.
Substratum layer(s):
17 to 23 inches - brown, extremely stony loamy
coarse sand.
23 to 60 inches - light yellowish brown,
extremely stony sandy loam.
SOIL PROPERTIES AND QUALITIES
Taglake
Effective rooting depth: greater than 60 inches.
Drainage class: somewhat excessively.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: low.
Permeability: moderately rapid.
Runoff: medium.
VEGETATION
Potential natural communities:
Taglake: subalpine fir-Engelmann spruce/Rocky
Mountain whortleberry (Abla-PienlNamy)
above 10,000 feet and lodgepole pine/Rocky
Mountain whortleberry (Pico/Vamy) below
10, 000 feet.
Sera/ stages: dominated by plants of the
respective potential natural communities.
Present vegetation: dominated by plants of the
respective potential natural communities.
USE AND MANAGEMENT CONSIDERATIONS
Major uses: homesites, timber harvest, firewood
harvest, limited livestock grazing, wildlife habitat,
and watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Sediment delivery efficiency: low.
Page 83 DRAFT 3/21/2011