Laserfiche WebLink
SOIL SURVEY <br /> Graypoint series Derrick series <br /> The Graypoint series consists of deep, well drained The Derrick series consists of deep, well drained soils <br /> soils that formed in moderately fine alkrvium that is shat- that formed in very gravelly and cobby alluvium over <br /> low over sand and gravel. Graypoint soils are on Hearty sand, gravel. and cobbles. Demck soils are on alluvial <br /> level to moderately sloping alluvial fano-Slopes are 0 to fans and terraces.Slopes are 0 to 10 percent The mean <br /> 9 percent. The mean annual predpflation is about 7 annual air temperature is about 41 degrees F, and the <br /> inches,and the mean annual air temperature is abort 41 mean annual precioitalon is about 7 inches. <br /> degrees F. Derrick soils are near the Graypoint. Donut, and Ple- <br /> Graypomt soils are similar to the San Arcacio soils and toxo soils. Graypoint soils have finer textures and fewer <br /> ere near the Derrick Dunut, San Arcade, and Platora cobbles in the upper part of the soil profile. Donut soils <br /> soils. Derrick and Duni sods are more than 35 percent are gravely sandy loam in the upper part of the profile. <br /> gravel and cobbles throughout. San Arcacio and Platoro Platen) soils have a clay loam 32t horizon that is less <br /> soils are more than 20 inches deep over sand and gravel than 35 percent coarse fragments. <br /> layers, and San Arcado sola are only moderately well Typical pedon of Derrick very cobbly sandy loam,0 to <br /> drained and have moderate salt accumulatbra. 1 percent slopes, 150 feet south and 50 feet east of the <br /> Typical porion of Graypoint gravely sandy bans,0 to 1 northwest corner of sec.31,T.36 N.,R.8 E.: <br /> percent slopes, about 700 feet south and 850 feet west <br /> of the northeast tomer of sec. 5, T. 33 N.. R. 9 E. A1-0 to 5 inches; pale brown (10YR 6/3) very cobbly <br /> sandy foam, dark brown (10YR 4/3) moist weak <br /> A1-0 to 5 inches; brown (10YR 5/3) gravelly sandy fire granular structure, hard, very friable: about 20 <br /> loam, dark brown (10YR 4/3) moist; weak fine percent gavel and 20 percent cobbles. mildly alka- <br /> granular structure; soft, very friable; about 20 per- line;clear wavy boesdery. <br /> cent gravel moderately alkaline; dear wavy bound- 82t-5 to 12 inches; yellowish brown (10YR 5/4) very <br /> art 1321--5 to 14 inches;yellowish brown(13YR 5/4)gravel- g avely clay loam,dark yellowish brown(10YR 4;4) <br /> ly sandy day loam,dark yellowish brown(10YR 4!4) moist weak medium subangular <br /> blostrucky; <br /> parting ; <br /> moderate median subangular wocky; hard, firm; <br /> moist; weak medium prismatic structure parting to vary thin patchy clay films on pads; about 30 per- <br /> moderate medium subangular blocky; hard, friable; cent gravel and 20 <br /> thin nearly continuous clay films on pads and coat- percent cobbles: mildly alkaline: <br /> Wig gravel; about 25 Percent gravel, mildly aika line; demi boundary. <br /> Ctca-12 to 17 inches; light brownish gray (10YR 6f2) <br /> clear wavy boundary. very cobbly sandy loam, dark grayish brown (10YR <br /> 4/2) moist; massive, slightly hard, friable; about 30 <br /> 83ca-14 to 18 inches; pale brown (10YR 6/3) very percent gravel and 40 percent cobbles: visible sec- <br /> gravelly sandy loam, dark brown (10YR 4/3) moist; cindery calcium carbonate occurring in thin seams <br /> very weak medium subangular blocky structure;soft and as coatings on undersides of cobbles; calcare- <br /> very friable; about 35 percent gravel; calcareous ous;moderately alkaline;clear wavy boundary. <br /> with lime occurring as thin seams and coating un- IIC2-17 to 60 inches; very gravelly sand; massive; soft, <br /> derslde of gravel; moderately alkaline; clear wavy very friable; calcareous with thin coatings of calcium <br /> boundary. carbonate on undersides of coarse fragments in <br /> IIO-18 to 72 inches; light brownish gray (10YR 6/2) upper part of the horizon:moderately alkaline. <br /> sand and gravel,mostly basalt,grayish brown(10YR <br /> 5/2)moist single grained loose when dry or moist Depth to calcareous malenal ranges from 6 to 20 <br /> inches. Depth to unconformable sand and gravel ranges <br /> calcareous in spots:moderately alkaline_ from 11 to 20 inches Content of rock fragments ranges <br /> Depth to uniformly calcareous material normally from 35 percent to about 70 permit in the solum. <br /> ranges from 6 to 20 inches. Depth to the sand and <br /> gravel layer ranges from 10 to 20 inches.Gravel content <br /> ranges from 10 to 35 percent in the major part of the <br /> profile and is dominantly one-quarter incl to 3 inches in <br /> diameter. <br /> Summit Engineering Job Number: 240328CE 44 7 <br /> 4. 719-589-6147 <br /> Alamosa, CO <br />