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• PAOtIIA SOIL SURVEY AREA MAPPI[IC UPIIT 7"7-C <br />SOIL t4APPING UNIT DESCRIPTIOt! PUBLISHED UNIT: 17 <br />:lapping Unit: Breece loam <br />?osition: Alluvial fans, flood plains, and terraces <br />~~•ainage: t4oderately well drained <br />Slope: 1 to 6 percent <br />Soil Profile: Texture Thickness Permeability <br />Surface: loam 0 to 19" Moderate (2.0-6.0"/hr.) <br />Subsurface: sandy loam 19-60" Rapid (7.0-20"/hr.) <br />Underlying material is stratified sands and silts that have distinct mottles <br />and is over sand, gravel, and cobble between 40 and 60 inches. Bedrock is <br />greater than 60 inches. <br />Available water capacity for the 40" rooting depth is 6.4 inches. Nater <br />table depth is 36-72 inches. <br />Erosion Hazard: toderate from water, slight from wind. Frequency of <br />flooding is none. <br />Capability Unit: IVe22 irrigated; VIe nonirrigated. <br />Range site: t4ountain Swale <br />Normal production is 1,700 lbs/acre dry weight forages <br />Otrer features: <br />Depth to a seasonal high ::ter table may be 3 to h feet. <br />Small gullies form where s~irface runoff :cater accumulates. <br />Risk of corrosion is moderate for uncoated steel and lo:r for concrete. <br />'?oderate frost action potential. <br />Fair for roadfill because of frost action. <br />Poor for sand because of excess fines; unsuited for gravel; fair for <br />topsoil because of small stones. <br />OVER <br />• <br />