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2025 Chaplain Blowdown Salvage Timber Sale <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 />SECTION 10 MATERIALS <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 /> 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 />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 />10-16 CORRUGATED ALUMINUM CULVERT: Aluminum culverts shall meet AASHTO M-196 (ASTM A- <br />745) specifications. <br />10-17 CORRUGATED PLASTIC CULVERT: Polyethylene culverts shall meet AASHTO M-294 specifications, <br />or ASTM F-2648 specifications for recycled polyethylene. Culverts shall be Type S – double walled with a <br />corrugated exterior and smooth interior. <br />10-21 METAL BAND: Metal coupling and end bands shall meet the AASHTO specification designated for the <br />culvert and shall have matching corrugations. On culverts 24 inches and smaller, bands shall have a <br />minimum width of 12 inches. On culverts over 24 inches, bands shall have a minimum width of 24 inches. <br />10-22 PLASTIC BAND: Plastic coupling and end bands shall meet the AASHTO specification designated for the <br />culvert. Only fittings supplied or recommended by the culvert manufacturer shall be used. <br />10-23 GAUGE AND CORRUGATION: Unless otherwise stated in the engineer’s design, metal culverts shall <br />conform to the following specifications for gauge and corrugation as a function of diameter. <br />Diameter Gauge Corrugation <br />18" 16 (0.064”) 2 ⅔" x ½" <br />24" to 48" 14 (0.079”) 3 ⅔" x ½" <br />54" to 96" 14 (0.079”) 3" x 1"