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88/27/1997 10:56 9702234386 FRONT RANGE STONE PAGE 03 <br />' . • <br />qUG c'7 '97 7:5? PRGE.003 <br />UNItED STATES DEPAATNENT OF AGAICULtIJRE TeehSlical Guide <br />Soil Conservation Service Section Iv <br />Colorado All Field Offices <br />July 1981 <br />STANDARDS AND SPECIFICATIONS <br />CRItICAL ARFJ~ PIJINTLNG (ac. ) <br />- (342) <br />Standard _ planning considerations <br />Definition <br />w. Pleating vegatetion, such as erase, <br />shrubs, ulnae, grasses or forba, <br />on highly erodible or critically <br />eroding areas (does not include tree <br />pleating mainly for wood products). <br />Purpose <br />Other Conservation practices, including <br />but not limited to diversions, land <br />smoothing, obstruction removal, surface <br />and subsurface drains, and underground <br />outlets, ~y be necessary to prepare a <br />critical area for planting. Site pre- <br />paration accomplished through ch• appli- <br />cation of the above practices should <br />resul[ in a site meeting the following <br />standards. <br />To stabilise the soil, reduce damage <br />From sediment sad runoff co downstream 1. Land slopes should not exceed 50 <br />areas, and improve wildlife habitat percent (2:1) ana should be fiercer <br />sad visual resources. where feasible and practicable. <br />•: -~ Coivlitions ~rher• practice applies <br />Oa highly erodible or critically ero- <br />dlbls or critically eroding areas. <br />'Lhasa areas usually cannot be seabil- <br />ized by ordinary conservation treat- <br />ment sad management nad, if left <br />untreated, can cause severe esosioa <br />or sediment damage. 8xamples of <br />spplieabla areas are dame, dikes, <br />,~ mine spoil, levees, roadsides, cues, <br />!ills, surface-mined areas, and de- <br />nuded or gulliad areas where vegeta- <br />tlen is difficult to establish by <br />usual planting methods. <br />Critical area planting should be <br />"'- applied only va sites that hays the <br />acv.. capability o! supporting vegetaeioa. <br />Soda critleal areas sre se hoselle to <br />_ plsnt.gtowth, because o! climate, <br />~°a` eoiZs or elope, chat etabilizstioa <br />can be achieved only through serue- <br />t rural measures. <br />~.. <br />Z. Soils or soil materials muse have <br />sufficient depth and potential <br />fertility Go support the type of <br />vegeeacion [o be eseabliahed- <br />3. Materials such as rocks and trash <br />that will interfere with planting <br />must be removed- <br />4. Aunoft water from she site or adja- <br />can[ areas must be controlled in a <br />mannez that will prevent serious <br />erosion sad damage to the plantSng. <br />Speeifieationa <br />to soilio <br />In the event that the soils have inauffi- <br />cieat depth or have physical character- <br />istics unsuitable for development of <br />vegetative cover, eopsoil or soil macezial <br />having the capability of supporting the <br />planned vegetative planting shall be <br />brought in and spread over the deficient <br />areas. 'The material muec be applied <br />uniformly in'suEficient depth to support <br />the type and quality of vegetative cover <br />planned for the site. Source of materials <br />muec be approved by the reaponaiD lc <br />ceehnician. <br />tGN 1170 <br />