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110.--ROMBERGCROSSCAN-ROCK OUTCROP COMPLEX, 25 TO 80 PERCENT SLOPES SETTING Flooding: None Landscape position: Canyons, hills, and structrral benches Runoff: Very High Parent material: Kind - colluvium and residuum; source - Hazard of water erosion: severe sandstone and shale Hazard of wind erosion: Slight Native plan[ community: Pion and Juniper woodland Shrink-swell potential: Low Elevation: 5 400 to8 800 feet Mean annual temperature: 50 to 52 degrees F Mean annual precipitation: 10 to 14 inches Frost-free period:120 to 135 days COMPoS7T/ON Romberg soil and similar inclusions: 30 percent Crosscan soil and similar inclusions: 30 percent Rock outcrop: 20 percent Contrasting inclusions: 15 percent CHARACTERISTICS OFTHE ROMBERG SOIL Landscape position: Carryons,hills, and structural benches Slope range: 25 to 50 percem Pazem material: Kind-colluvium; source--sandstone and shale TYPICAL PROFILE 0 to 2inches---dark brown very stony loam 2 to 20 inches--dark brown to light brown very stony clay loam 20 to 60 inches--brown very stony clay loam So¢ PROPERTIES epth class: Very deep Drainage class: Well drained Permeability: Moderately slow Available water capacity: Low Potential rooting depth: 60 inches or more Flooding: None Runoff: Very high Hazard of water erosion: Severe Hazard of wind erosion: Slight Shrink-swell potential: I,ow CfIARACfERIST/CS OF THE CROSSCAN SOI L Landscape position: Canyons and trills Slope range: 25 to 80 percem Parent material: Kind--colluvium and residuum; source--- sandstone and shale TFP/cAL PROFILE 0 to 2 inches--dark brown very bouldery sandy clay loam 2 to 9inches--light brown very gravelly clay loam 9 to 18 inches---variegated colors of very gravelly clay loam 18 inches---soft calcareous shale SOIL PROPERTIES Depth class: Shallow and very shallow Drainage class: Well drained Permeability: Slow Available water capacity: Very low Potential rooting depth: 6 to 20 inches CHARACTERISTICS OFTHE ROC%OUTGROP Landscape position: Canyons and hills Slope range: 25 - 80 Parent material: Kind--residuum; source -sandstone and shale Rock outcrop consists of barren rock that occurs as ledges and nearly vertical cliffs of sandstone. Rock outcrop also includes areas where the depth to bedrock is less than 4 inches. INCLUDED AREA Contrasting Inclusions Gapmesa soils on hills and mesas Rizno soils on mesas and stmctural benches Torriorthents on hills and canyons Zigzag soils on ridges and knobs Similar Inclusions Soils that have fewer rock fragments on surface Soils that nave hard bedrock MA/OR USES Wildlife habitat and livestock grazing MAJORMANAGEMENT FACTORS Rangeland Suitability: Very poor Dominant vegetation in the potential plant community on ibis unit: Utah juniper, pinioq mountain mahogany, Indian ricegrass, galleta, western wheatgrass Potential annual production of airi}ry vegetation on the Romberg soil: 300 pounds per acre Soil-related factors: Slope, depth, stones Management considerations: • Steep slopes limit livestock use to areas of less slope. • Low available water capacity limits forage production. • Surface stones limit equipment use. CROPLAND Suitability: Unsuited Soil-related factors: Slope, stones BUILDING SITE DEVELOPMENT Suitability: Poor Soil-related factors: Slope, permeability, depth Management considerations: • Depth to bedrock may limit excavations. • The presence of shallow bedrock may adversely affect septic systems. • Steepness of slope will increase the hazard of erosion and should be considered in construction. • Slope may limit septic system design. • The design of septic systems should consider the slow permeability of the soil. 1HY1O0• - 24 - DA1011Y Appl NINOMARSN SANDSTONE