Sierra Pacific Industries 8/16/2020

Chaplain Gap Timber Sale • Construct non-drivable waterbars at natural drainage points and at a spacing that will produce a vertical drop of no more than 20 feet between waterbars and with a maximum horizontal spacing of 400 feet. • Skew waterbars at least 30 degrees from perpendicular to the road centerline on roads in excess of 3 percent grade. • Key waterbars into the cut-slope to intercept the ditch.Waterbars shall be outsloped to provide positive drainage.Outlets shall be on stable locations. • Inslope or outslope the road as appropriate. • Remove bridges and other structures. • Pull back unstable fill that has potential of failing and entering any Typed waters or wetlands. Removed material shall be placed and compacted in a stable location. • Remove berms except as designed. • Block the road by constructing an aggressive barrier of dense interlocked large woody debris(logs, stumps,root wads,etc.)so that four wheel highway vehicles cannot pass the point of abandonment. Typical barrier dimensions are 10 feet high by 20 feet deep,spanning the entire road prism from top of cutslope to toe of fillslope.Long term effectiveness is the primary objective.If necessary construct a vehicular turn-around near the point of abandonment. • Apply grass seed to all exposed soils resulting from the abandonment work and in accordance with Section 8 EROSION CONTROL. SECTION 10 MATERIALS 10-3 GEOTEXTILE FOR STABILIZATION:Geotextiles shall meet the following minimum requirements for strength and property qualities,and shall be designed by the manufacturer to be used for stabilization or reinforcement,and filtration.Material shall be free of defects,cuts,and tears. ASTM Test Requirements Type -- Woven Apparent opening size D 4751 No.40 max Water permittivity D 4491 0.10 sec-1 Grab tensile strength D 4632 315 lb Grab tensile elongation D 4632 50% Puncture strength D 6241 620 lb Tear strength D 4533 112 lb Ultraviolet stability D 4355 50%retained after 500 hours of exposure 10-15 CORRUGATED STEEL CULVERT:Metallic coated steel culverts shall meet AASHTO M-36(ASTM A- 760)specifications.Culverts shall be galvanized(zinc coated meeting AASHTO M-218). 10-16 CORRUGATED ALUMINUM CULVERT:Aluminum culverts shall meet AASHTO M-196(ASTM A- 745)specifications. 10-17 CORRUGATED PLASTIC CULVERT:Polyethylene culverts shall meet AASHTO M-294 specifications, or ASTM F-2648 specifications for recycled polyethylene.Culverts shall be Type S—double walled with a corrugated exterior and smooth interior. 10-21 METAL BAND:Metal coupling and end bands shall meet the AASHTO specification designated for the culvert and shall have matching corrugations.On culverts 24 inches and smaller,bands shall have a minimum width of 12 inches.On culverts over 24 inches,bands shall have a minimum width of 24 inches.