General location: Ravines in valleys

Major land resource area (MLRA): 3

Elevation: 5,000 to 6,500 feet

Average annual precipitation: 30 to 60 inches

Average annual air temperature: 38 to 42 degrees F

Frost-free period: 0 to 50 days

Stirfry and similar soils: 25 percent

Minor components: 5 percent

Landform: Ashflow

26 Soil Survey of

Geomorphic position: Nonvegetated ashflow deposits in valleys

Parent material: Ash, cinders, pumice, and andesite

Slope: 0 to 70 percent

Percentage of surface covered with stones and boulders: None

Restrictive features: None within a depth of 60 inches

Drainage class: Excessively drained

Landform: Drainageway

Geomorphic position: Base of side slopes of ravines, and stream terraces

Parent material: Mossy organic material over pumice and ash

Slope: 0 to 15 percent

Percentage of surface covered with stones and boulders: None

Restrictive features: None within a depth of 60 inches

Depth to mineral soil: 40 to 60 inches

Drainage class: Very poorly drained

Permeability: Moderately rapid

Flooding: Not present

Water table: Present (see table 20)

Ponding: Not present

Available water capacity: About 8.5 inches

Ecological site: Rangeland—(003XY015OR) Meadow Fen 40-60 PZ

Oi—0 to 2 inches; peat

Oe—2 to 8 inches; mucky peat

Oa1—8 to 18 inches; muck

Oa2—18 to 51 inches; muck

2A—51 to 60 inches; gravelly ashy coarse sand

Percentage of map unit: 5 percent

Landform: Ashflow

Geomorphic position: Forested side slopes of ravines

• Dustiness

• Wind erosion

• Water erosion

• Steep and unstable slopes

• Low water-holding capacity

• Wetness

• Organic soil material throughout profile

• Frost hazard