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Russula Commercial Thin Timber Sale <br /> <br /> <br /> <br />9-22 ABANDONMENT: <br /> <br />● Remove all ditch relief culverts. The resulting slopes shall be 1:1 or flatter. The removed fill material <br />shall be placed and compacted in a location that will not erode into any Typed waters or wetlands. <br />● Remove all culverts in natural drainages. The resulting slopes shall be 1:1 or flatter. Strive for <br />matching the existing native stream bank gradient. The natural streambed width shall be re-established. <br />The removed fill material shall be placed and compacted in a location that will not erode into any <br />Typed waters or wetlands. <br />● Transport all removed culverts off site. All removed culverts shall become the property of the <br />Purchaser. <br />● Construct non-drivable waterbars at natural drainage points and at a spacing that will produce a <br />vertical drop of no more than 20 feet between waterbars and with a maximum horizontal spacing of <br />400 feet. <br />● Skew waterbars at least 30 degrees from perpendicular to the road centerline on roads in excess of 3 <br />percent grade. <br />● Key waterbars into the cut-slope to intercept the ditch. Waterbars shall be outsloped to provide positive <br />drainage. Outlets shall be on stable locations. <br />● Inslope or outslope the road as appropriate. <br />● Remove bridges and other structures. <br />● Pull back unstable fill that has potential of failing and entering any Typed waters or wetlands. <br />Removed material shall be placed and compacted in a stable location. <br />● Remove berms except as designed. <br />● Block the road by constructing an aggressive barrier of dense interlocked large woody debris (logs, <br />stumps, root wads, etc.) so that four wheel highway vehicles cannot pass the point of abandonment. <br />Typical barrier dimensions are 10 feet high by 20 feet deep, spanning the entire road prism from top of <br />cutslope to toe of fillslope. Long term effectiveness is the primary objective. If necessary construct a <br />vehicular turn-around near the point of abandonment. <br />● Apply grass seed to all exposed soils resulting from the abandonment work and in accordance with <br />Section 8 EROSION CONTROL. <br /> <br />SECTION 10 MATERIALS <br /> <br />10-3 GEOTEXTILE FOR STABILIZATION: Geotextiles shall meet the following minimum requirements for <br />strength and property qualities, and shall be designed by the manufacturer to be used for stabilization or <br />reinforcement, and filtration. Material shall be free of defects, cuts, and tears. <br /> <br /> ASTM Test Requirements <br />Type -- Woven <br />Apparent opening size D 4751 No. 40 max <br />Water permittivity D 4491 0.10 sec-1 <br />Grab tensile strength D 4632 315 lb <br />Grab tensile elongation D 4632 50% <br />Puncture strength D 6241 620 lb <br />Tear strength D 4533 112 lb <br />Ultraviolet stability D 4355 50% retained after 500 hours of exposure <br /> <br />10-15 CORRUGATED STEEL CULVERT: Metallic coated steel culverts shall meet AASHTO M-36 (ASTM A- <br />760) specifications. Culverts shall be galvanized (zinc coated meeting AASHTO M-218). <br /> <br />10-16 CORRUGATED ALUMINUM CULVERT: Aluminum culverts shall meet AASHTO M-196 (ASTM A- <br />745) specifications.