HomeMy WebLinkAbout01.07 Soils ReportUnited Stales
Department of
Agriculture
Forest Service
White River
National Forest,
Aspen, Dillon, Eagle,
Holy Cross, Rifle, and
Sopris Ranger Districts
Soil and Ecological Land
Unit Survey.
Holy Cross Area, Colorado
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White River National Forest. Colorado
Map Unit: 104A—Cryoborolls - Cryaquolls
association, 0 to 15 percent slopes.
Ecological Land Unit: 104A—willows and
sedges on montane and subalpine, valleys.
MAP UNIT SETTINGS
Location: throughout the survey area.
Landform: valleys.
Parent material: alluvium.
Geologic symbol: Qa.
Elevation range: 9000 to 11800 feet.
Aspect: all.
Climatic zone:. montane and subalpine.
Mean annual precipitation: 20 to 40 inches.
Mean annual air temperature: 34°F. to 42°F.
Average annual snowfall: 200 to 400 inches.
COMPOSITION
65 percent Cryoborolls and similar soils.
30 percent Cryaquolls and similar soils.
Contrasting Inclusions
5 percent Typic Cryochrepts under spruce, fir
and pine.
TYPICAL PROFILES:
Cryoborolls
Surface Iayer(s):
0 to 2 inches - grayish brown, channery silt
loam.
2 to 12 inches - brown, silt loam.
Subsurface layer(s):
12 to 20 inches - pale brown, silt loam.
Subsoil layer(s):
20 to 47 inches - pale brown, channery silt
loam.
Substratum Iayer(s):
47 to 60 inches - grayish brown, channery
silt loam.
Cryaquolls
Surface covering layer:
2 to 0 inches - sedge litter and duff.
Surface Iayer(s):
0 to 15 inches - very dark gray, silt loam.
Subsoil layer(s):
15 to 22 inches - light gray, gravelly sandy
clay loam.
22 to 60 Inches - reddish yellow, clay loam.
SOIL PROPERTIES AND DUALITIES
Cryoborolls
Effective rooting depth: greater than 60
inches.
Drainage class: well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
Cryaquolls
Effective rooting depth: greater than 60
inches.
Drainage class: 0 to 1 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
VEGETATION
Potential natural communities:
Cryoborolls: aspen/mountain snowberry
(Potr1 /Syor1) moist site and mountain big
sagebrush/Thurber fescue (Artry/Feth) and
Thurber fescue/Idaho fescue (Feth/Feid).
Cryaquolls: planeleaf willow/water sedge
(Saphp/Caaq) and Booth willow-
willow/bluejoint reedgrass (Sabo 1-SALI/Caca)
and (Vete/Hesp) clayey soil.
Seral 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, livestock grazing,
wildlife habitat, aquatic habitat, scenic vistas
and watershed.
Mass movement potential:-
Landslides:
otential:-Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Cryoborolls: moderate- variable textures.
Cryaquolls: severe- high water table and
saturated soil.
Improved unsurfaced roads:
Cryoborolls: moderate- variable textures and
proximity to wetlands.
Cryaquolls: severe- high water table.
Offroad vehicle roads and trails:
Cryoborolls: moderate- variable textures,
proximity to wetlands and surface
compaction and rutting.
Cryaquolls: severe- high water table.
Foot balls and paths:
Cryoborolls: slight.
Cryaquolls: severe- high water table.
Revegetation limitations:
Page 3 DRAFT 8/31/94
Cryoborolls: slight.
Cryaquolls: moderate- high water table.
Revegetation considerations: Revegetating
Cryaquolls soil with riparian vegetation
requires maintaining a high water table. Buffer
zones are required on adjacent map units to
minimize impacts to wetlands.
soli and ecological land unit survey
Timber management considerations: Buffer
zones are required on adjacent map units to
minimize impacts to wetlands.
Wildlife management considerations: This map
unit provides food, shelter and water to upland
game animals. Where streams occur, this map
unit provides aquatic habitat..
Acid precipitation buffering capacity: high.
Pepe 4 DRAFT 8/31/94
i
Map Unit: 220B-Leadville family, till
substratum, 5 to 40 percent slopes.
Ecological Land Unit: 2208—subalpine fir and
Engelmann spruce on montane and subalpine,
pound and lateral moraines.
MAP UNIT SETTINGS
Location: glaciated parts of the survey area
where sedimentary rocks predominate.
Landform: gound and lateral moraines.
Parent material: glacial till.
Geologic symbol: Qd.
Elevation range: 9000 to 11000 feet.
Aspect: all.
Climatic zone:. montane and subalpine.
Mean annual precipitation: 20 to 40 inches.
Mean annual air temperature: 34°F. to 42°F.
Average annual snowfall: 200 to 400 inches
COMPOSITION
95 percent Leadville and similar soils.
Contrasting Inc/usions
5 percent Cryaquolls on ponded drainages.
TYPICAL PROFILES:
Leadville
Surface covering layer:
1.5 to 0 inches - spruce, fir and pine litter
and duff.
Surface layer(s):
0 to 1 inches - dark yellowish brown, loam.
1 to 7 inches - yellowish brown, gravelly silt
loam.
Subsurface layer(s):
7 to 15 inches - pink, very cobbly silt loam.
15 to 20 inches - pink, very cobbly very fine
sandy loam.
Subsoil layer(s):
20 to 31 inches - pink, extremely cobbly
sandy clay loam.
31 to 40 inches - pink, extremely cobbly clay
loam.
40 to 60 inches - pink, very cobbly clay
loam.
SOIL PROPERTIES AND QUALITIES
Leadville
—Effective rooting depth: greater than 60
inches.
•
Soil and ecological land unit survey
Drainage class: well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
VEGETATION
Potential natural communities: -
Leadville: subalpine fir -Engelmann
spruce/Rocky Mountain whortleberry (Abia-
Pien1Namy) below 11,000 feet and subalpine
fir -Engelmann spruce/grouse whortleberry
(Abla-Pian 1 Nasci above 11,000 feet.
Seral 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: timber harvest, limited livestock
grazing, wildlife habitat and watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Leadville: slight.
Improved unsurfaced roads:
Leadville: slight.
Offroad vehicle roads and trai/s:
Leadville: moderate- cobbles and stones.
Foot trails and paths:
Leadville: slight.
Revegetation limitations:
Leadville: moderate.
Revegetation considerations: Mulch will
conserve soil moisture and protect seedling
establishment..
Timber management considerations: Inclusions
of Cryaquolls soil require buffer zones to
protect wetlands.
Wildlife management considerations: This map
unit provides shelter for upland game animals.
_ Acid precipitation buffering, capacity: moderate.
Page 18 DRAFT 8/31/94
Map Unit: 223B—Leighcan family - Rock outcrop
- Cryaquolls complex, 0 to 40 percent slopes.
Ecological Land Unit: 223B—subalpine fir,
Engelmann spruce, willows and sedge on
montane and subalpine, ice scoured glacial
valley bottoms.
MAP UNIT SETTINGS
Location: glaciated parts of the survey area
where igneous and metamorphic rocks
predominate.
Landform: ice scoured glacial valley bottoms.
Parent material: glacial till.
Geologic symbol: Qd.
Elevation range: 9500 to 11800 feet.
Aspect: all.
Climatic zone:. montane and subalpine.
Mean annual precipitation: 20 to 40 inches.
Mean annual air temperature: 34°F. to 42°F.
Average annual snowfall: 200 to 400 Inches.
COMPOSITION
40 percent Leighcan and similar soils.
30 percent Rock outcrop.
20 percent Cryaquolls and similar soils.
Contrasting inclusions
7 percent Hechtman family on ice scoured
residuum.
3 percent Handan family under meadows.
TYPICAL PROFILES:
Leighcan
Surface covering layer:
1.5 to 0 Inches - spruce, fir and pine litter
and duff.
Surface layer(s):
0 to 2 inches - yellowish brown, very cobbly
silt loam.
Subsurface layer(s):
2 to 7 Inches - very pale brown, very cobbly
loamy coarse sand.
7 to 14 inches - very pale brown, very
cobbly sandy loam.
Subsoil layer(s):
14 to 24 inches - very pale brown, extremely
stony sandy loam.
24 to 32 Inches - yellowish brown, extremely
cobbly sandy loam.
Substratum layer(s):
32 to 72 inches - light gray, extremely -
cobbly sandy loam.
Rock outcrop
Soil and ecological land unit survey
Cryaquolls
Surface covering layer:
2 to 0 inches - sedge litter and duff.
Surface layer(s):
0 to 15 inches - very dark gray, silt loam.
Subsoil layer(s):
15 to 22 inches - light gray, gravelly sandy
clay loam. -
22 to 60 inches - reddish yellow, clay loam.
SOIL PROPERTIES AND QUALITIES
Leighcan
Effective 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: slow.
Rock outcrop
Landform: Ice scoured knobs, benches and
cliffs.
Parent material: residuum.
Rock type: igneous and metamorphic.
Runoff: rapid.
Cryaquolls
Effective rooting depth: greater than 60
inches.
Drainage class: well.
Depth to seasonal high water table: 0 to 1
feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: slow.
VEGETATION
Potential natural communities: -
Lelghcan: lodgepole pine/Rocky Mountain
whortleberry (PlcoNamy) below 10,000 feet
and subalpine fir -Engelmann spruce/Rocky
Mountain whortleberry (Abla-PIen1Namy).
below 11,000 feet and subalpine fir -
Engelmann spruce/grouse whortleberry (Abla-
Pien 1 Nasc) above 11,000 feet.
Cryaquolls: planeleaf willow/water sedge
(Saphp/Caaq) stream drainagesbelow 11,000
feet and grayleaf willow-willow/sedges (Sag11-
SALI/CARE) stream drainages above 11,000
feet and (Caaq/Caut) seeps and bogs.
Seral stages: dominated by plants of the
respective potential natural communities
Present vegetation: dominated by plants of the
respective potential natural communities
Page 20 DRAFT 8/31/94
White River National Forest, Colorado
USE AND MANAGEMENT CONSIDERATIONS
Major uses: wildlife habitat, limited livestock
grazing, recreation and watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Leighcan: slight.
Rock outcrop: severe- bedrock.
Cryaquolls: severe- wetlands and high water
table.
Improved unsurfaced roads:
Leighcan: slight.
Rock outcrop: severe- bedrock.
Cryaquolls: severe- wetlands and high water
table.
Offroad vehicle roads and trails.-
Leighcan:
rails.Leighcan: slight.
Rock outcrop: severe- bedrock.
Cryaquolls: severe- wetlands and high
water table.
Foot trails and paths:
Leighcan: slight.
Rock outcrop: severe- bedrock.
Cryaquolls: severe- wetlands and high water
table.
Revegetation limitations:
Leighcan: slight- low available water capacity
and low inherent fertility.
Rock outcrop: slight- bedrock.
Cryaquolls: severe- wetlands and high water
table.
Revegetatlon considerations: Revegetating
Leighcan soil requires mulch to retain soil
moisture and fertilizer to supplement low
Inherent fertility. Revegetating Cryaquolls soil
with riparian vegetation requires maintaining a
high water table..
Timber management considerations: Cryaquolls
soil require buffer zones to protect wetlands.
Wildlife management consider ations: This map
unit provides food, shelter and water to upland
game animals. Where streams occur, this map
unit provides aquatic habitat..
Acid precipitation buffering capacity: low.
Page 21 DRAFT 8131194
Map Unit: 302D—Subwell family - Ustochrepts -
Rock outcrop complex, 40 to 150 percent
slopes, eroded.
Ecological Land Unit: 3020—Gambel oak and
mountain mahogany on lower montane, south
facing steep to very steep mountain slopes.
MAP UNIT SETTINGS
Location: throughout the survey area.
Landform: steep to very steep mountain slopes.
Parent material: colluvium and residuum.
Geologic symbol: Tgl, Kd, Pm, PPm, TrPs.
Elevation range: 7000 to 8500 feet.
Aspect: south.
Climatic zone:. lower montane.
Mean annual precipitation: 16 to 25 inches.
Mean annual air temperature: 42°F. to 48°F.
Average annual snowfall: 100 to 200 inches.
COMPOSITION
40 percent Subwell and similar soils.
30 percent Ustochrepts and similar soils.
20 percent Rock outcrop.
Contrasting inclusions
10 percent Duffymont family on residuum.
TYPICAL PROFILES:
Subwell
Surface covering layer: .
2 to 0 inches - oak, grass and forb litter.
Surface layer(s):
0 to 6 inches - reddish brown, bouldery
loam.
6 to 13 inches - reddish brown, very cobbly
loam.
Subsoil layer(s):
13 to 22 inches - red, very cobbly loam.
22 to 31 inches - red, very cobbly sandy clay
loam.
31 to 60 inches - reddish brown, sandy clay
loam.
Ustochrepts
Surface layer(s):
0 to 3 inches - reddish brown, sandy loam.
Subsoil layer(s):
3 to 11 inches - light red, gravelly sandy
loam.
11 to 22 inches - light reddish brown,
extremely gravelly sandy loam.
Unweathered bedrock:
22 inches - hard fractured sandstone.
Rock outcrop
SOIL PROPERTIES AND QUALITIES
Soil and ecological land unit survey
Subwell
Effective rooting depth: greater than 20
inches.
Drainage class: well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
Ustochrepts
Effective rooting depth: greater than 10
inches.
Drainage class: greater than 6 feet.
Available water capacity: low.
Permeability: moderately rapid.
Runoff: moderate.
Rock outcrop
Landform: cliffs and talus.
Parent materia!: residuum and colluvium.
Rock type: sedimentary rock.
Runoff: rapid.
VEGETATION
Potential natural communities:
Subwell: Gambel oak/Saskatoon serviceberry
(Quga/Amal). -
Ustochrepts: mountain-mahogany/bluebunch
wheatgrass (Cemo/Rosy).
Seral 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: wildlife habitat, senic vistas and
watershed.
Mass movement potential:
Landslides: low.
Debris flows: moderate.
Snow avalanche: moderate.
Road and trail limitations:
Cut and fill slope stability
Subwell: moderate- slope.
Ustochrepts: moderate- slope.
Rock outcrop: slight- bedrock.
Improved unsurfaced roads:
Subwell: severe- slope.
Ustochrepts: severe- slope.
Rock outcrop: severe- cliffs and unstable
talus.
Offroad vehicle roads and trails:
Subwell: severe- slope and erosion hazard.
Ustochrepts: severe- slope and erosion
hazard.
Page 42 DRAFT 8131/94
(
White River National Forest, Colorado
Rock outcrop: severe- cliffs and unstable
talus.
Foot trails and paths:
Subwell: moderate- slope.
Ustochrepts: severe- slope and erosion
hazard.
Rock outcrop: severe- cliffs and unstable
talus.
Revegetation limitations:-
Subwell: moderate- slope and erosion hazard.
Ustochrepts: severe- slope, erosion hazard
and low inherent fertility.
Rock outcrop: severe- bedrock.
Revegetation considerations: Plant drought
tolerant plants tosurvive south facing slopes.
Mulch will conserve soil moisture and protect
seedling establishment. Surface netting will
reduce the erosion hazard.
Wildlife management considerations: This map
unit provides food, shelter and winter habitat
for upland game animals.
Fire management considerations: Suseptible to
shrub and grass fires.
Acid precipitation buffering capacity: high.
Pepe 43 DRAFT 8/31/94
Map Unit: 3136—Scout family - Rubble land -
Seitz family complex, 5 to 40 percent slopes.
Ecological Land Unit: 3138—subalpine fir and
Engelmann spruce on subalpine, collapsed basalt
plateaus and landslides.
MAP UNIT SETTINGS
Location: Four Mile, Basalt and Sheephcrn
areas.
Landform: collapsed basalt plateaus and
landslides.
Parent material: till.
Geologic symbol: Qta, Od, Tb.
Elevation range: 9000 to 1 1000 feet.
Aspect: all.
Climatic zone:: subalpine.
Mean annual precipitation: 25 to 40 inches.
Mean annual air temperature: 34°F. to 38°F.
Average annual snowfall: 300 to 400 inches.
COMPOSITION
45 percent Scout and similar soils.
30 percent Rubble land.
20 percent Seitz and similar soils.
Contrasting Inclusions
5 percent cryaquolls on ponded drainages.
TYPICAL PROFILES:
Scout
Surface covering layer:
1.5 to 0 inches - spruce, fir and pine litter
and duff.
Surface layer(s):
0 to 7 inches - light brown, very cobbly
loam.
Subsurface Iayer(s):
7 to 19 inches - light reddish brown,
extremely cobbly fine sandy loam.
19 to 30 inches - light reddish brown,
extremely gravelly sandy loam.
Subsoil layer(s):
30 to 39 inches - red, extremely gravelly
sandy loam.
39 to 57 inches - red, extremely cobbly
sandy loam.
57 to 72 inches - red, extremely cobbly
sandy clay loam.
Rubble land
Seitz
Surface covering layer:
1 to 0 inches - spruce, fir and pine litter and
duff.
Surface Iayer(s):
Soil and ecological lend unit survey
0 to 3 inches - pale brown, stony silt loam.
3 to 17 inches - brown, cobbly silt loam.
Subsurface Iayer(s):
17 to 22 inches - pale brown, very cobbly
silty clay.
22 to 45 inches - yellowish brown, very
cobbly clay.
Subsoil Iayer(s):
45 to 63 inches - light yellowish brown,
extremely stony clay.
63 to 72 inches - pale brown, extremely
cobbly clay.
to inches - , extremely channery coarse
sand.
SOIL PROPERTIES AND QUALITIES
Scout
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: moderate.
Rubble land
Landform: boulder fields.
Parent material: till.
Rock type: igneous.
Runoff: slow.
Seitz
Effective rooting depth: greater than 40
inches.
Drainage class: well.
Depth to seasonal high -water table: greater
than 6 feet.
Available water capacity: high.
Permeability: slow.
Runoff: moderate.
VEGETATION .
Potential natural ccmmunities:
Scout: subalpine fir -Engelmann spruce/Rocky
Mountain whortleberry (Abla-Pien1Namy).
Seitz: 0.
Seral stages: dominated with plants of the
potential natural community
Present vegetation: dominated by plants of the
potential natural community
USE AND MANAGEMENT CONSIDERATIONS
Major uses: wildlife habitat and watershed.
Mass movement potential:
Lands/ides: low.
Page 50 DRAFT 8/31/94
White River National Forest, Colorado
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Scout: slight.
Rubble land: moderate- variable materials.
Seitz: moderate- fine textured materials.
Improved unsurfaced roads:
Scout: slight.
Rubble land: moderate- cobbles, stones and
boulders.
Seitz: moderate- low load bearing strength.
Offroad vehicle roads and trails:
Scout: slight.
Rubble land: severe- cobbles, stones and
boulders.
Seitz: moderate- mud during seasonal wet
periods, low load bearing strength, surface
compaction and rutting.
Foot trails and paths:
Scout: slight.
Rubble land: moderate- cobbles, stones and
boulders.
Seitz: slight.
Revegetation limitations:
Scout: slight.
Rubble land: severe- cobbles, stones and
boulders.
Seitz: slight.
Revegetation considerations: Mulch will
conserve soil moisture and protect seedling
establishment..
Timber management considerations: Rubble
land makes planting difficult.
Wildlife management considerations: This map
unit provides shelter for upland game animals.
Acid precipitation buffering capacity: moderate.
Page 51 DRAFT 8131(94
Map Unit: 317C—Stonyridge - Eyre families
complex, 40 to 65 percent slopes.
Ecological Land Unit: 317C—Douglas fir on
lower montane, north facing steep mountain
slopes.
MAP UNIT SETTINGS
Locatlon: lower elevations of the survey area.
Landform: steep mountain slopes.
- Parent material: colluvium and residuum.
- Geologic symbol: Two, Kmv, Kp.
Elevation range: - 7500 to 9500 feet.
Aspect: north.
-Climatic zone:. lower montane.
- Mean annual precipitation: 16 to 25 inches.
- Mean annual air temperature: 42°F. to 48°F.
--Average annual snowfall: 100 to 200 inches.
COMPOSITION
60 percent Stonyridge and similar soils.
25 percent Eyre and similar soils.
—Contrasting inclusions
10 percent Leadville family under dense stands
of Douglas fir.
5 percent cliffs and talus.
TYPICAL PROFILES:
Stonyridge
Surface covering layer:
3 to 0 inches - oak, grass and forb litter and
duff.
Surface Iayer(s):
0 to 7 inches - dark grayish brown, silt
loam.
7 to 13 inches - dark grayish brown, gravelly
silt loam.
Subsurface layer(s):
13 to 24 inches - pale brown, very gravelly
sandy loam.
Subsoil Iayer(s):
24 to 52 inches - brown, very flaggy clay
loam.
52 to 60 inches - , extremely flaggy day
loam.
Eyre
Surface covering layer:
1 to 0 inches - aspen, grass and forb litter.
Surface Iayer(s):
0 to 5 inches - reddish gray, gravelly loam.
5 to 12 inches - reddish brown, very gravelly
loam.
Subsoil layer(s):
Soil and ecological land unit survey
12 to 17 inches - light red, extremely cobbly
sandy clay loam.
Unweathered bedrock:
inches - hard sandstone.
SOIL PROPERTIES AND QUALITIES
Stonyridge
Effective rooting depth: greater than 20
inches.
Drainage class: well.
Depth to seasonal high water table: greater -
than 6 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
Eyre
— Effective rooting depth: Tess than 20 inches.
Drainage class: greater than 6 feet.
Available water capacity: low.
Permeability: moderate.
Runoff: .
VEGETATION
Potential natural communities:
Stonyridge: Douglas fir/Gambel oak
(Psme/Quga).
Eyre: Douglas fir/Gambel oak (Psme/Quga).
Seral stages: dominated with plants of the
potential natural community
Present vegetation: dominated by plants of the
potential natural community
USE AND MANAGEMENT CONSIDERATIONS
Major uses: limited timber harvest, limited
livestock grazing, wildlife habitat and
watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Stonyridge: moderate- slope.
Eyre: slight.
Improved unsurfaced roads:
Stonyridge: severe- slope.
Eyre: severe- slope and shallow depth to
bedrock.
Offroad vehicle roads and trails:
Stonyridge: severe- slope and erosion
hazard.
Eyre: severe- slope, shallow depth to
bedrock and erosion hazard.
Foot trails and paths:
Page 54 DRAFT 8/31/94
White River National Forest, Colorado
Stonyridge: moderate- slope and erosion
hazard.
Eyre: moderate- slope and erosion hazard.
Revegetation limitations:
Stonyridge: moderate- slope low available
water capacity, and erosion hazard.
Eyre: severe- slope, low available water —
capacity, shallow depth to bedrock and
erosion hazard.
Revegetation considerations: Plant drought
tolerant plants to survive south facing slopes.
Mulch will conserve soil moisture and protect
seedling establishment. Surface netting will
reduce the erosion hazard.
Timber management considerations: Tree
establishment requires shade from shrub
canopy cover.
Wildlife management considerations: This map
unit provides food, shelter and winter habitat
for livestock and upland game animals.
Acid precipitation buffering capacity: high.
Page 55 DRAFT 8131194
White River Nadonel Forest, Colorado
Map Unit: 331 C—Peeler - Leadville families
complex, 40 to 65 percent slopes.
Ecological Land Unit: 331C—subalpine fir and
Engelmann spruce on subalpine, north facing
landslide and slump scarp faces.
MAP UNIT SETTINGS
Location: Four Mile part of the survey area.
Landform: landslide and slump scarp faces.
Parent material: residuum and colluvium.
Geologic symbol: Two.
Elevation range: 9000 to 10500 feet.
Aspect: north.
Climatic zone:. subalpine.
Mean annual precipitation: 25 to 40 inches.
Mean annual air temperature: 34°F. to 38°F.
Average annual snowfall: 300 to 400 inches.
COMPOSITION
50 percent Peeler and similar soils.
35 percent Leadville and similar soils.
Contrasting inclusions -
10 percent Hechtman family an residuum.
TYPICAL PROFILES:
Peeler
Surface covering layer:
1 to 0 inches - spruce, fir and pine litter and
duff.
Surface layer(s):
0 to 1 inches - very dark gray, silt loam.
Subsurface Iayer(s):
1 to 15 inches - pale brown, loam.
Subsoil Iayer(s):
15 to 44 inches - very pale brown, gravelly
clay loam.
44 to 60 inches very pale brown, sandy
loam.
Leadville
Surface covering layer:
1.5 to 0 inches - spruce, fir and pine litter
and duff.
Surface Iayer(s):
0 to 1 inches - dark yellowish brown, loam.
1 to 7 inches - yellowish brown, gravelly silt
loam.
Subsurface Iayer(s):
7 to 15 inches - pink, very cobbly silt loam.
15 to 20 inches - pink, very cobbly very fine
sandy loam.
Subsoil layer(s):
20 to 31 inches - pink, extremely cobbly
sandy day loam.
31 to 40 inches - pink, extremely cobbly clay
loam.
40 to 60 inches - pink, very cobbly clay
loam.
SOIL PROPERTIES AND QUALITIES
Peeler
Effective rooting depth: greater than 40
inches.
Drainage class: well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
Leadville
Effective rooting depth: greater than 40
inches.
Drainage class: greater than 6 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
VEGETATION
Potential natural communities:
Peeler: subalpine fir -Engelmann spruce/elk
sedge (Abla-Pien1/Cagel).
Leadville: subalpine fir -Engelmann spruce/elk
sedge (Abla-Pien1/Cagel) and subalpine fir -
Engelmann spruce/Rocky Mountain
whortleberry (Abla-Pien 1 Namy) .
Seral 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: wildlife habitat and watershed.
Mass movement potential: -
Landslides: low.
Debris flows: moderate.
Snow avalanche: moderate.
Road and trail limitations:
Cut and fill slope stability
Peeler: severe- slope, fine grained materials.
Leadville: moderate- slope.
Improved unsurfaced roads: -
Peeler: severe- slope.
Leadville: severe- slope.
Offroad vehicle roads and trails:
Peeler: severe- slope and erosion hazard.
Leadville: severe- slope and erosion hazard.
Foot trails and paths:—
Peeler: moderate- slope.
Page 59 DRAFT 8/31/94
Leadville: moderate- slope.
Revegetation limitations:
Peeler: moderate- slope and erosion hazard.
Leadville: moderate- slope and erosion hazard.
Revegetation considerations: Mulch will
conserve soil moisture and protect seedling
Soil end ecological lend unit survey
establishment. Surface netting will reduce the
erosion hazard.
Timber management considerations: Limited by
slope and erosion hazard.
Wildlife management considerations: This map
unit provides shelter for upland game animals.
Acid precipitation buffering capacity: moderate.
Page 60 DRAFT 8/31/94
White River National Forest. Colorado
Map Unit: 332B—Echemoor family, 5 to 40
percent slopes.
Ecological Land Unit: 3328—aspen on montane,
south facing slumps, landslides and structural
benches.
MAP UNIT SETTINGS
Location: Four Mile part of the survey area.
Landform: slumps, landslides and structural
benches.
Parent material: residuum and slope wash.
Geologic symbol: Two.
Elevation range: 8000 to 10000 feet-
Aspect: south.
Climatic zone:. montane.
Mean annual precipitation: 20 to 30 inches.
Mean annual air temperature: 38°F. to 42°F.
Average annual snowfall: 200 to 300 inches.
COMPOSITION
85 percent Echemoor and similar soils.
Contrasting inclusions
10 percent Wetopa family on shale high in clay
content.
3 percent Tampico family on residuum.
2 percent Cryaquolls on seeps and ponded
drainages.
TYPICAL PROFILES:
Echemoor
Surface covering layer:
.5 to 0 inches - aspen, grass and forb duff.
Surface layer(s):
0 to 16 inches - dark brown, silt loam.
Subsurface layer(s):
16 to 22 inches - brown, clay loam.
Subsoil layer(s):
22 to 34 inches - brown, sandy clay loam.
Weathered bedrock:
34 to 60 inches - soft weathered shale.
SOIL PROPERTIES AND QUALITIES -
Echemoor
Effective rooting depth: greater than 40
inches.
Drainage class: well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: high.
Permeability: moderately slow.
Runoff: moderate.
VEGETATION
Potentia! natural communities.-=
Echemoor: aspen/mountain snowberry
(Potr1 /Syor1) typical site and aspen/Saskatoon
serviceberry-chokecherry (Potr1 /Amal-Pavi1)
below 9,500 feet and aspen/lingusticum
(Potr1 /LIGU) moist site.
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: timber harvest, livestock grazing,
senic vistas, wildlife habitat and watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Echemoor: moderate- fine grained material.
Improved unsurfaced roads:
Echemoor: moderate- low load bearing
strength.
Offroad vehic/e roads and trails:
Echemoor: moderate- surface rutting and
compaction.
Foot trails and paths:
Echemoor: slight.
Revegetation limitations:-
Echemoor: slight.
Revegetation considerations: Aspen regenerates
naturally. Mulch will conserve soil moisture
and protect seedling establishment..
Timber management considerations: Aspen will
regenerate naturally. Mechanical equipment
can cause compaction.
Wildlife management considerations: This map
unit provides food and shelter for livestock and
upland game animals.
Acid precipitation buffering capacity: high.
Page 81 DRAFT 8131/94
Map Unit: 3368—Gateview - Handran -
Duffymont families complex, 0 to 25 percent
slopes.
Ecological Land Unit: 3368—Gambel oak and
aspen on lower montane, benchs and mesas.
MAP UNIT SETTINGS
Location: Four Mile, Divide Creek and Woody
Creek parts of the survey area.
Landform: benchs and mesas.
Parent material: residuum and colluvium.
Geologic symbol: Kmvu, Pm.
Elevation range: 7500 to 8500 feet.
Aspect: all.
Climatic zone:. lower montane.
Mean annual precipitation: 16 to 25 inches.
Mean annual air temperature: 42°F. to 48°F.
Average annual snowfall: 100 to 200 inches.
COMPOSITION
40 percent Gateview and similar soils.
30 percent Handran and similar soils.
25 percent Duffymont and similar soils.
Contrasting inclusions -
5 percent Quander family on shale and
siltstone.
TYPICAL PROFILES:
Gateview
Surface covering layer:
3 to 0 inches - aspen, grass and forb litter
and duff.
Surface Iayer(s):
0 to 19 inches - dark reddish gray, gravelly
loam.
Subsoil layer(s):
19 to 29 inches - reddish brown, very cobbly
loam.
29 to 38 inches - light reddish brown, very
cobbly sandy clay loam.
38 to 60 inches - light reddish brown,
extremely cobbly sandy clay loam.
Handran
Surface covering layer:
2.5 to 0 inches - grass litter and duff.
Surface Iayer(s):
0 to 5 inches - reddish brown, gravelly loam.
5 to 12 inches - reddish brown, very gravelly
loam.
Subsurface Iayer(s):
12 to 16 inches - reddish brown, very
gravelly sandy loam.
Subsoil layer(s):
Soil end ecological land unit survey
16 to 27 inches - light reddish brown, very
gravelly sandy loam.
27 to 36 inches - reddish brown, very cobbly
sandy loam.
Substratum layer(s):
36 to 60 inches - light reddish brown,
extremely cobbl / sandy loam.
Duffymont
Surface covering layer:
1 to 0 inches - shrub and grass litter.
Surface layer(s):
0 to 4 inches - reddish brown, very gravelly—
very fine sandy loam.
4 to 12 inches - reddish brown, very gravelly
loam.
Subsoil layer(s):
12 to 15 inches - reddish brown, extremely
channery loam.
Unweathered bedrock:
15 inches - hard, platy sandstone.
SOIL PROPERTIES AND QUALITIES
Gateview
Effective rooting depth: greater than 40
inches.
Drainage class: well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
Handran
Effective rooting depth:- greater than 20
inches.
Drainage class: greater than 6 feet.
Available water cnpacity: low.
Permeability: moderately rapid.
Runoff: moderate.
Duffymont
Effective rooting depth: less than 20 inches.
Drainage class: somewhat excessively.
Depth to seasonal high water tab/e:- greater
than 6 feet.
Available water capacity: low.
Permeability: moderately rapid.
Runoff: rapid.
VEGETATION
Potential natural communities:
Gateview: aspen/mountain snowberry
(Poul /Syor1).and aspen/Thurber fescue
(Potr1 /Feth) and aspen/Saskatoon
serviceberry-chokecherry (Potr1 /Amal-Favi l ).
Page 68 DRAFT 8/31/94
White River National Forest, Colorado
Handran: aspen/mountain snowberry
(Potrl /Syorl) and aspen/Saskatoon
serviceberry-chokecherry (Potrl /Amal-Pavi 1 ).
Duffymont: Gambel oak/Saskatoon
serviceberry (Quga/Amal) and Gambel oak-
switchgrassfThurber fescue (Quga-Pavi/Feth)
and Gambel oak/mountain snowberry
(Quga/Syorl ).
Seral 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: livestock grazing, senic vistas,
wildlife habitat and watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Gateview: slight.
Handran: slight.
Duffymont: slight.
Improved unsurfaced roads:
Gateview: slight.
Handran: slight.
Duffymont: moderate- shallow depth o
bedrock.
Offroad vehicle roads and trails:
Gateview: slight.
Handran: slight.
Duffymont: slight.
Foot .trails and paths:
Gateview: slight.
Handran: slight.
Duffymont: slight.
Revegetation limitations:
Gateview: slight.
Handran: slight.
Duffymont: moderate- shallow depth to
bedrock.
Revegetstion considerations: This map unit can
be manipulated to support either tree, shrub or
grass plant associations. Mulch will conserve
soil moisture and protect seedling --
establishment..
Wildlife management considerations: This map
unit provides food, shelter and winter habitat
for upland game animals.
Fire management considerations: Suseptible to
shrub and grass fires.
Acid precipitation buffering capacity: high:
Pepe 87 DRAFT 8/31/94
Map Unit: 338B—Wetopa - Doughspon -
Echemoor families complex, 5 to 40 percent
slopes.
Ecological Land Unit: 3388—aspen on montane,
south facing slumps and landslides.
MAP UNIT SETTINGS
Location: Four Mile part of the survey area.
Landform: slumps and landslides.
Parent material: till.
Geologic symbol: Two, Km.
Elevation range: 8000 to 10000 feet.
Aspect: south.
Climatic zone:. montane.
Mean annual precipitation: 20 to 30 inches.
Mean annual air temperature: 38°F. to 42°F.
Average annual snowfall: 200 to 300 inches.
COMPOSITION
40 percent Wetopa and similar soils.
30 percent Doughspon and similar soils.
20 percent Echemoor and similar soils.
Contrasting inclusions -
10 percent Cryaquolls on seep and ponded
drainages.
TYPICAL PROFILES:
Wetopa
Surface covering layer:
.25 to 0 inches - aspen, grass and forb litter.
Surface layer(s):
0 to 13 inches - dark gray, silty clay loam.
Subsoil layer(s): -
13 to 17 inches - grayish brown, silty clay
loam.
17 to 45 inches - light brown, silty clay.
45 to 60 inches - brown, cobbly silty clay
loam.
Doughspon
Surface covering layer:
.5 to 0 inches - aspen and forb litter and
duff.
Surface layer(s):
0 to 4 inches - dark grayish brown, loam.
4 to 14 inches - grayish brown, cobbly silt
loam.
Subsoil layer(s):
22 to 28 inches - grayish brown, very cobbly
silty day loam.
28 to 39 inches - brown, very cobbly clay
loam.
39 to 60 inches - brown, very cobbly clay.
Soil and ecological lend unit survey
Echemoor
Surface covering ayer:
.5 to 0 inches - aspen, grass and forb duff.
Surface layer(s):
0 to 16 inches - dark brown, silt loam.
Subsurface Iayer(s):
16 to 22 inches - brown, clay loam.
Subsoil Iayer(s):
22 to 34 inches - brown, sandy clay
Weathered bedrock:
34 to 60 inches - soft weathered shale.
SOIL PROPERTIES AND QUALITIES
Wetopa
Effective rooting depth: greater than 60
inches.
Drainage class: well.
Depth to seasonal high water table:greater
than 6 feet.
Available water capacity: high.
Permeability: slow.
Runoff: moderate.
Doughspon
Effective rooting depth: greater than 60
inches.
Drainage class: greater than 6 feet.
Available water capacity: high.
Permeability: moderately slow.
Runoff: moderate.
Echemoor
Effective rooting depth: greater than 60
inches.
Drainage class: well.
Depth to seasonal high watertable: greater -
than 6 feet.
Available water capacity: high.
Permeability: moderately slow.
Runoff: moderate.
VEGETATION
Potential natural communities: —
Wetcpa: aspen/lingusticum (Potr1 /LIGU) moist
site and aspen/mountain snowberry
(Potr1 /Syor 1) and aspen/Fendler meadow -rue
(Potr1 / Thfel ).
Doughspon: aspen/lingusticum (Potrl /LIGU)
moist site and aspen/mountain snowberry
(Potr1 /Syor1) ano aspen/Fendler meadow -rue
(Potr1 /Thfe1).
Echemoor: aspen/lingusticum (Potr1/LIGU)
moist site and aspen/mountain snowberry
(Potr1 /Syorl ).
• Sera/ stages: dominated by plants of the
respective potential natural communities
Page 68 DRAFT 8/31/94
White River National Forest, Colorado
Present vegetation: dominated by plants of the
respective potential natural communities
USE AND MANAGEMENT CONSIDERATIONS
Major uses: timber harvest, livestock grazing,
senic vistas, wildlife habitat and watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Wetopa: moderate- fine grained material.
Doughspon: moderate- fine grained material.
Echemoor: moderate- fine grained material.
Improved unsurfaced roads:
Wetopa: moderate- low load bearing
strength.
Doughspon: moderate- low load bearing
strength.
Echemoor: moderate- low load bearing
strength.
Offroad vehicle roads and trails:
Wetopa: moderate- low load bearing
strength, mud during seasonal wet periods,
surface rutting and compaction.
Doughspon: moderate- low Toad bearing
strength, mud during seasonal wet periods,
surface rutting and compaction.
Echemoor: moderate- low Toad bearing
strength, mud during seasonal wet periods,
surface rutting and compaction.
Foot trails and paths:
Wetopa: moderate- mud during seasonal wet -
periods.
Doughspon: moderate- mud during seasonal
wet periods.
Echemoor: moderate- mud during seasonal
wet periods.
Revegetation limitations:-
Wetopa:
imitations-Wetopa: slight.
Doughspon: slight.
Echemoor: slight.
Revegetation considerations: Aspen regenerates
naturally. Mulch will conserve soil moisture
and protect seedling establishment..
Timber management considerations: Aspen will
regenerate naturally.
Wildlife management considerations: This map
unit provides food and shelter for livestock and
upland game animals.
Acid precipitation buffering capacity: high.
Page 89 DRAFT 8/31194
White River National Forest, Colorado
Map Unit: 345B—Doughspon family, 5 to 40
percent slopes.
Ecological Land Unit: 3456—aspen on montane,
south facing slumps and landslides.
MAP UNIT SETTINGS
Location: Four Mile, Basalt and Sheephorn
areas.
Landform: slumps and landslides.
Parent material: till.
Geologic symbol: Two, Km, Kp.
Elevation range: 8000 to 10500 feet.
Aspect: south.
Climatic zone:. montane.
Mean annual precipitation: 20 to 30 inches.
Mean annual air temperature: 38°F. to 42°F.
Average annual snowfall: 200 to 300 inches.
COMPOSITION
90 percent Doughspon and similar soils.
Contrasting inclusions
10 percent Cryaquolls on seeps and ponded
drainages.
TYPICAL PROFILES:
Doughspon
Surface covering layer:
.5 to 0 inches - aspen and forb litter and
duff.
Surface layer(s):
0 to 4 inches - dark grayish brown, loam.
4 to 14 inches - grayish brown, cobbly silt
loam. -
Subsoil layer(s):
22 to 28 inches - grayish brown, very cobbly
silty clay loam.
28 to 39 inches - brown, very cobbly day
loam.
39 to 60 inches - brown, very cobbly clay.
SOIL PROPERTIES AND QUALITIES
Doughspon
Effective rooting depth: greater than 60
inches.
Drainage class: moderately well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: high.
Permeability: moderately slow.
Runoff: moderate.
VEGETATION
Potential natural communities:
Doughspon: aspen/mountain snowberry
(Potrl lSyorl) typical site ar.d
aspen/lingusticum (Potr1 /LIGU) moist site and
aspen/Saskatoon serviceberry-chokecherry
(Potr1/Amal-Pavi1) below 9,500 feet.
Serol 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: timber harvest, livestock grazing,
senic vistas, wildlife habitat and watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability
Doughspon: moderate- fine grained material.
Improved unsurfaced roads:-
Doughspon: moderate- low load bearing
strength.
Offroad vehicle roads and trails:
Doughspon: moderate- low Toad bearing
strength, mud during seasonal wet periods,
surface rutting and compaction.
Foot trails and paths:
Doughspon: moderate- mud during seasonal
wet periods.
Revegetation limitations: —
Doughspon: slight.
Revegetation considerations: Aspen regenerates --
naturally. Mulch will conserve soil moisture
and protect seedling establishment..
Timber management considerations: Aspen will
regenerate naturally.
Wildlife management considerations: This map
unit provides food and shelter for livestock and
upland game animals.
Acid precipitation buffering capacity: high.
Page 71 DRAFT 8/31/94
White River National Forest, Colorado
Map Unit: 352C—Scout family, shale
substratum, 40 to 65 percent slopes.
Ecological Land Unit: 352C—subalpine fir and
Engelmann spruce on montane and subalpine,
north facing steep mountain slopes.
MAP UNIT SETTINGS
Location: throughout the survey area.
Landform: steep mountain slopes.
Parent material: residuum and colluvium.
Geologic symbol: Km, Kp.
Elevation range: 8500 to 11800 feet.
Aspect: north.
Climatic zone:. montane and subalpine.
Mean annual precipitation: 20 to 40 inches.
Mean annual air temperature: 34°F. to 42°F.
Average annual snowfall: 200 to 400 inches.
COMPOSITION
85 percent Scout and similar soils.
Contrasting inclusions -
10 percent cliffs and talus.
5 percent Hechtman family on residuum.
TYPICAL PROFILES:
Scout
Surface covering layer:
1.5 to 0 inches - spruce, fir and pine litter
and duff.
Surface layer(s):
0 to 7 inches - light brown, very cobbly
loam.
Subsurface layer(s):
7 to 19 inches - light reddish brown,
extremely cobbly fine sandy loam.
19 to 30 inches - light reddish brown,
extremely gravelly sandy loam.
Subsoil layer(s):
30 to 39 inches - red, extremely gravelly
sandy loam.
39 to 57 inches - red, extremely cobbly
sandy loam.
57 to 72 inches - red, extremely cobbly
sandy clay loam.
SOIL PROPERTIES AND QUALITIES
Scout
Effective 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: moderate.
VEGETATION
Potential natural communities
Scout: subalpine fir -Engelmann spruce/Rocky
Mountain whortleberry (Abla-Pien 1 Namy)
typical site and lodgepole pine/Rocky Mountain
whortleberry (PicoNamy) below 10,000 feet.
Serol 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: limited timber harvest, wildlife
habitat and watershed.
Mass movement potential:
Lands/ides: low.
Debris flows: moderate.
Snow avalanche: moderate.
Road and trail limitations:
Cut and fill slope stability
Scout: moderate- slope and fine grained
materials.
Improved unsurfaced roads: —
Scout: severe- slope, low load bearing
strength and unstable shale bedrock.
Offroad vehicle roads and trails:
Scout: severe- slope, erosion hazard and
mud during seasonal wet periods.
Foot trails and paths:
Scout: moderate- slope, erosion hazard and
mud during seasonal wet periods.
Revegetation /imitations:
Scout: moderate- slope and. erosion hazard. _
Revegetation considerations: Mulch will
conserve soil moisture and protect seedling
establishment. Surface netting will reduce the
erosion hazard.
Timber management considerations: Harvest is
limited by slope, unstable shale bedrock and
erosion hazard.
Wildlife management considerations: This map
unit provides shelter for upland game animals.
Acid precipitation buffering capacity: moderate.
Page 85 DRAFT 8/31/94
Map Unit:_382B—Seitz - Tellura families -
Cryaquolls complex, 0 to 40 percent slopes.
Ecological Land Unit: 382B—subalpine fi ,
Engelmann spruce, aspen, grass and sedges on
montane and subalpine, landslides and slumps.
MAP UNIT SETTINGS
Location: Four Mile, Basalt and Sheephorn
areas.
Landformr landslides and slumps.
Parent materia/: till.
Geologic symbol: Tt, Two, Kd, Kc,Kp.
Elevation range: 9000 to 1 1000 feet.
Aspect: all.
Climatic zone:: montane and subalpine.
Mean annual precipitation: 20 to 40 inches.
Mean annual air temperature: 34°F. to 42°F.
Average annual snowfall: 200 to 400 inches.
COMPOSITION
45 percent Seitz and similar soils.
25 percent Tellura and similar soils.
20 percent Cryaquolls and similar soils.
Contrasting inclusions -
5 percent rubble land where landslide debris
has accumulated.
5 percent Cowdrey family where there are no
coarse fragments.
TYPICAL PROFILES:
Seitz
Surface covering layer:
1 to 0 inches - spruce, fir and pine litter and
duff.
Surface Iayer(s):
0 to 3 inches - pale brown, stony silt loam.
3 to 17 inches - brown, cobbly silt loam.
Subsurface layer(s):
17 to 22 inches - pale brown, very cobbly
silty clay.
22 to 45 inches - yellowish brown, very
cobbly clay.
Subsoil layer(s):
45 to 63 inches - light yellowish brown,
extremely stony clay.
63 to 72 inches - pale brown, extremely
cobbly clay.
to inches - , extremely channery coarse
sand.
Tellura
Surface layer(s):
0 to 2 inches - brown, cobbly loam.
2 to 8 inches - brown, cobbly silt loam.
Soil and ecological land unit survey
Subsurface layer(s):
8 to 14 inches - brown, very cobbly clay
loam.
Subsoil layer(s):
14 to 18 inches
loam.
18 to 35 inches
cobbly clay.
35 to 44 inches
- brown, very cobbly clay
- light yellowish brown, very
- light yellowish brown, very
cobbly clay loam.
Substratum Iayer(s):
44 to 60 inches - very pale brown, very
gravelly sandy clay loam.
Cryaquolls
Surface covering layer:
2 to 0 inches - sedge litter and duff.
Surface layer(s):
0 to 15 inches - very dark gray, silt loam.
Subsoil layer(s):
15 to 22 inches - light gray, gravelly sandy
clay loam.
22 to 60 inches - reddish yellow, clay loam
SOIL PROPERTIES AND QUALITIES
Seitz
Effective rooting depth: greater than 60
inches.
Drainage class: well.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: high.
Permeability: slow.
Runoff: moderate.
Tellura
Effective rooting depth: greater than 60
inches.
Drainage class: greater than 6 feet.
Available water capacity: high.
Permeability: slow.
Runoff: .
Cryaquolls
Effective rooting depth: greater than 60
inches.
Drainage class: well.
Depth to seasonal high water table: 0 to 1
feet.
Available water capacity: moderate.
Permeability: moderate.
Runoff: moderate.
VEGETATION
Potential natural communities:
Seitz: subalpine fir -Engelmann spruce/Rocky
Mountain whortleberry (Abla-Pien1Namy).
Page 100 DRAFT'S/31/94
•
t
White River National Forest, Colorado
Tellura: 0.
Cryaquolls: () and (Abla-Pien1/Setr).
Seraf stages: dominated by plants of the
respective potential natural communities
Present vegetation: dominated by seral
vegetation
USE AND MANAGEMENT CONSIDERATIONS
Major uses: limited timber harvest, limited
livestock grazing, wildlife habitat and
watershed.
Mass movement potential:
Landslides: low.
Debris flows: low.
Snow avalanche: low.
Road and trail limitations:
Cut and fill slope stability -
Seitz: moderate- fine grained material.
Tellura: moderate- fine grained material.
Cryaquolls: severe- high water table and
saturated soil.
Improved unsurfaced roads:
Seitz: moderate- low load bearing strength.
Tellura: moderate- low Toad bearing
strength.
Cryaquolls: severe- high water table ans
saturated soil.
Offroad vehicle roads and trails:-
Seitz:
rails:Seitz: moderate- mud during seasonal wet
periods, surface compaction and rutting.
Tellura: moderate- mud during seasonal wet
periods, surface compaction and rutting.
Cryaquolls: severe- high water table.
Foot trails and paths: -
Seitz: moderate- mud during seasonal wet
periods.
Tellura: moderate- mud during seasonal wet --
periods.
Cryarjuolls: severe- high water table..
Revegetation limitations:
Seitz: slight.
Tellura: slight.
Cryaquolls: moderate- high water table.
Revegetation considerations: Grass and forb
plant associations have the best chance of
survival, Mulch will conserve soil moisture
and protect seedling establishment.
Revegetating Cryaquolls soil with riparian
vegetation requires maintaining a high water
table.
Timber management considerations: Trees are
unlikely to re-establish naturally. Cryaquolls
soil require buffer zones to protect wetlands.
Wildlife management considerations: This map
unit provides food, shelter and water to upland
game animals. Where streams occur, this map
unit provides aquatic habitat..
Acid precipitation buffering capacity: high_
Page 101 DRAFT 8/31/94
White River National Forest, Colorado
Map Unit: 385D—Scout family - Rock outcrop -
Hechtman family complex, 40 to 150 percent
slopes.
Ecological Land Unit: 385D—subalpine fir and
Engelmann spruce on subalpine, steep to very
steep mountain slopes.
MAP UNIT SETTINGS
Location: mountainous areas where
sedimentary rocks predominate.
Landform: steep to very steep mountain slopes.
Parent material: colluvium and residuum.
Geologic symbol: Pm, PPm, TrPs.
Elevation range: 10000 to 11800 feet.
Aspect: all.
Climatic zone:. subalpine.
Mean annual precipitation: 25 to 40 inches.
Mean annual air temperature: 34°F. to 38°F.
Average annual snowfall: 300 to 400 inches.
COMPOSITION
50 percent Scout and similar soils.
25 percent Rock outcrop.
20 percent Hechtman and similar soils.
Contrasting inclusions -
5 percent Cryoborolls on avalanche chutes.
TYPICAL PROFILES:
Scout
Surface covering layer:
1.5 to 0 inches - spruce, fir and pine litter
and duff.
Surface Iayer(s):
0 to 7 inches - light brown, very cobbly
loam.
Subsurface layer(s):
7 to 19 inches - light reddish brown,
extremely cobbly fine sandy loam.
19 to 30 inches - light reddish brown,
extremely gravelly sandy loam.
Subsoil layer(s):
30 to 39 inches - red, extremely gravelly
sandy loam. -
39 to 57 inches - red, extremely cobbly
sandy loam.
57 to 72 inches - red, extremely cobbly
sandy clay loam.
Rock outcrop
Hechtman
Surface covering layer:
1.5 to 0 inches - spruce, fir and pine litter
and duff.
Surface Iayer(s):
0 to 1 inches - grayish brown, cobbly loam.
Subsurface layer(s):
1 to 6 inches - light yellowish brown, cobbly
sand" loam.
Subsoil layerls):
6 to 15 inches - light yellowish brown, very
cobbly sandy loam.
Unweathered bedrock:
15 inches - Hard igneous and metamorphic
rock.
SOIL PROPERTIES AND QUALITIES
Scout
Effective rooting depth: greater than 20
inches.
Drainage c/ass: somewhat excessively.
Depth to seasonal high water table: greater
than 6 feet.
Available water capacity: low.
Permeability: moderately rapid.
Runoff: moderate.
Rock outcrop
Landform: cliffs and talus.
Parent material: residuum and colluvium.
Rock type: sandstone.
Runoff: rapid.
Hechtmon
Effective rooting depth: less 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:
Scout: subalpine fir -Engelmann spruce/Rocky
Mountain whortleberry (Abia-PienlNamy)
typical site and subalpine fir -Engelmann
spruce/common juniper (Abia-Pien1/Juco)
south slopes.
Hechtman: subalpine fir -Engelmann
spruce/Rocky Mountain whortleberry (Abla-
PienlNamy) typical site and subalpine fir -
Engelmann spruce/common juniper (Abia-
Pien1 /Juco).
Seral 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: wildlife habitat and watershed.
Page 103 DRAFT 8/31/94
Mass movement potential:
Landslides: moderate.
Debris (lows: high.
Snow avalanche: high.
Road and trail limitations:
Cut and t711 slope stability
Scout: moderate- slope.
Rock outcrop: slight.
Hechtman: slight.
Improved unsurfaced roads:
Scout: severe- slope.
Rock outcrop: severe- cliffs and unstable
talus.
Hechtman: severe- slope and shallow depth
to bedrock.
Offroad vehicle roads and trails:
Scout: severe- slope and erosion hazard.
Rock outcrop: severe- cliffs and unstable
talus.
Hechtman: severe- slope and erosion
hazard.
Soil and ecological land unit survey
Foot trails and paths:
Scout: moderate- slope and erosion hazard.
Rock outcrop: severe- cliffs and unstable
talus.
Hechtman: severe- slope and erosion hazard.
Revegetation limitations
Scout: moderate- slope, low available water --
capacity and erosion hazard.
Rock outcrop: severe- bedrock.-
Hechtman: severe- slope, shallow depth to
bedrock, low available water capacity and
erosion hazard.
Revegetaiion considerations: Mulch will -
conserve soil moisture and protect seedling
establishment. Surface netting will reduce the
erosion hazard.
Timber management considerations: Limited by
scope, rock outcrop and erosion hazard.
Wildlife management considerations: This map
unit provides shelter for upland game animals.
Acid precipitation buffering capacity: moderate.
Page 104 DRAFT 8/31/94
Map Unit: 449C—Tampico - Echemoor families
complex, 30 to 65 percent slopes.
Ecological Land Unit: 449C—aspen on
montane, south facing landslide and slump
scarp faces.
MAP UNIT SETTINGS
Location: Four Mile area.
Landform: landslide and slump scarp faces.
Parent material: residuum and slope wash.
Geologic symbol: Two.
Elevation range: 9000 to 10500 feet.
Aspect: south.
Climatic zone:. montane.
Mean annual precipitation: 20 to 30 inches.
Mean annual air temperature:- 38°F. to 42°F.
Average annual snowfall: 200 to 300 inches.
COMPOSITION
50 percent Tampico and similar soils.
35 percent Echemoor and similar soils.
Contrasting inclusions
15 percent Eyre family on sandstone residuum.
TYPICAL PROFILES:
Tampico
Surface covering layer:
1 to 0 inches - aspen, grass and forb litter
and duff.
Surface layer(s):
0 to 3 inches - brown, loam.
3 to 13 inches - grayish brown, day loam.
Subsoil layer(s):
13 to 18 inches - very pale brown, sandy
clay loam.
Substratum layer(s):
18 to 24 inches - very pale brown, sandy
clay loam.
Weathered bedrock:
24 to 60 inches - soft weathered sandstone.
Echemoor
Surface covering layer:
.5 to 0 inches - aspen, grass and forb duff.
Surface layer(s):
0 to 16 inches - dark brown, silt loam..
Subsurface layer(s):
16 to 22 inches - brown, clay loam.
Subsoil layer(s):
22 to 34 inches - brown, sandy clay loam.
Weathered bedrock:
34 to 60 inches - soft weathered shale.
SOIL PROPERTIES AND QUALITIES
Soil and ecological land ,snit survey
Tampico
Effective rooting depth: greater than 20
inches.
Drainage class: well.
Depth to seasonal high water table: greater --
than 6 feet.
Available water capacity: moderate. -
Permeability: moderate.
Runoff: rapid.
Echemoor
Effective rooting depth: greater than 60
inches.
Drainage class: greater than 6 feet.
Available water capacity: high.
Permeability: moderately slow.
Runoff: rapid.
VEGETATION
Potential natural communities:-
Tampico:
ommunities-Tampico: aspen/mountain snowberry
(Potrl /Syorl) and aspen/Saskatoon
serviceberry-chokecherry (Potr1 /Amal-Pavi1)
below 9,500 feet and Thurber fescue/Idaho
fescue (Feth/Feid) ridgeline.
Echemoor: aspen/mountain snowberry
(Potr1/Syor1) and aspen/Saskatoon
serviceberry-chokecherry (Potr1 /Amal-Pavi1)
below 9,500 feet and aspen/lingusticum
(Poul /LIGU) moist site.
Seral stages: dominated with plants of the
potential natural community
Present vegetation: dominated by plants of the
respective potential natural communities
USE AND MANAGEMENT CONSIDERATIONS —
Major uses: limited livestock grazing, wildlife
habitat and watershed.
Mass movement potential:
Landslides: moderate.
Debris flows: moderate.
Snow avalanche: moderate.-
Road
oderate_Road and frail /imitations:
Cut and fill slope stability
Tampico: moderate- slope and fine grained
material.
Echemoor: moderate- slope and fine grained
material.
Improved unsurfaced roads:
Tampico: severe- slope and low load bearing
strength.
Echemoor: severe- slope and low load
bearing strength.
Offroad vehicle roads and trails: •
Tampico: severe- slope and erosion hazard.
Page 120 DRAFT 8/31/94
White River National Forest, Coloredo
Echemoor: severe- slope and erosion hazard.
Foot trails and paths:
Tampico: moderate- slope.
Echemoor: moderate- slope.
Revegetation limitations:
Tampico: moderate- slope and ersoion hazard.
Echemoor: moderate- slope and ersoion
hazard.
Revegetation considerations: Plant drought
tolerant plants to survive south facing slopes.
Mulch will conserve soil moisture and protect
seedling establishment. Surface netting will
reduce the erosion hazard.
Wildlife management considerations: This map
unit provides food and shelter for livestock and
upland game animals.
Acid precipitation buffering capacity: high.
Page 121 DRAFT 8/31/94