PERMFILE54121 - Laserfiche WebLink

Home Browse Search

v UNITED STATES DEPART'!lIENNI OF AGRICULTURE Soil Conservation 5etvlce Colorado Technical Guide Section IV All Yleld Offices July 19g1 STANDARDS AND SPECIFICATIONS CRITICAL AREA PLANTING {ac.) (342) Standard Definition Planting vegetation, ouch as trees, shrubs, vines, grasses or (orbs, on highly erodible or critically eroding areas (does not include tree plantfog mainly for wood products). Purpose To stabilize the soil, reduce damage from sediment and runoff to downstream areas, end improve wildlife habitat and visual resources. Conditions where practice applies On highly erodible or critically ero- Bible or critically eroding areas. These areas usually cannot be stabil- ized by ordinary conservation treat- ment and management and, if left untreated, can csuee severe erosion or •edlment damage. Examples of applicsble areas are dams, dikes, mine spoil, levees, rosdsides, tuts, fills, surface-mined areas, and de- nuded or Bullied areas where vegeta- tion is difficult to establish by usual planting methods. I Critical area planting should be f applied only on sites that have the capability of supporting vegetation. Some critical areas are ao hoetlle to plant growth, because of climate, soils or elope, that stabilization can be achieved only through •iruc- I ture2 measures. Planning considerations Other conservation praetieec, including but not limited to diversions, land smoothing, obstruction removal, surface •nd subsurface dzainc, and underground outlets, may be necessary to prepnre a critical area for planting. Site pre- paration •ccompliahed through the appli- cation of the above practices should result in a site meeting the following standards. 1. Lnd slopes should sot a:teed 50 percent (2:1) sad should be flatter where feasible and practicable. 2. Soils or soil materials must have sufficient depth sad potential fertility to support the type of vegetation to be estsblished. 3. Materials such •s rocks and trssh that will interfere wlth planting must be removed. 4. Runoff caster from the site or adle- cent areas must be controlled in a manner that will prevent serious erosion and damage to the planting. 5yecifications soiling In the event that the soils have insuffi event depth or have physical character- istics unsuitable for development of vegetative cover. topsoil or soil maters having the capability of supporting the planned vegetative planting shall be brought in and spread over the deficient areas. The materiel must be applied uniformly !n sufficient depth to support the type and quslity of vegetative cover planned for the site. Source of meter is must be approved by the recpoaeible technician. ..i