Sierra Pacific Industries 8/16/2020

Chaplain Gap Timber Sale 10-22 PLASTIC BAND:Plastic coupling and end bands shall meet the AASHTO specification designated for the culvert.Only fittings supplied or recommended by the culvert manufacturer shall be used. 10-23 GAUGE AND CORRUGATION:Unless otherwise stated in the engineer's design,metal culverts shall conform to the following specifications for gauge and corrugation as a function of diameter. Diameter Gauge Corrugation 18" 16(0.064") 2 2/3"x 24"to 48" 14(0.079") 3 2/3"x'/2" 54"to 96" 14(0.079") 3"x 1" SECTION 11 SPECIAL NOTES FOREST ACCESS ROAD MAINTENANCE SPECIFICATIONS CUTS AND FILLS: • Maintain slope lines to a stable gradient compatible with the construction materials.Remove slides from ditches and the roadway.Repair fill-failures,in accordance with Clause 4-6 EMBANKMENT SLOPE RATIO,with selected material or material approved by the Contract Administrator.Remove overhanging material from the top of cut slopes. • Waste material from slides or other sources shall be placed and compacted in stable locations identified in the road plan or approved by the Contract Administrator,so that sediment will not deliver to any streams or wetlands. • Slide material and debris shall not be mixed into the road surface materials,unless approved by the Contract Administrator. SURFACE: • Grade and shape the road surface,turnouts,and shoulders to the original shape on the TYPICAL SECTION SHEET.Inslope or outslope as directed to provide a smooth,rut-free traveled surface and maintain surface water runoff in an even,unconcentrated manner. • Blading shall not undercut the backslope or cut into geotextile fabric on the road. • If required by the Contract Administrator,water shall be applied as necessary to control dust and retain fine surface rock. • Surface material shall not be bladed off the roadway.Replace surface material when lost or worn away,or as directed by the Contract Administrator. • Remove shoulder berms,created by grading,to facilitate drainage,except as marked or directed by the Contract Administrator. • For roads with geotextile fabric:spread surface aggregate to fill in soft spots and wheel ruts(barrel spread) to prevent damage to the geotextile fabric. DRAINAGE: • Prevent silt bearing road surface and ditch runoff from delivering sediment to any streams or wetlands. • Maintain rolling dips and drivable waterbars as needed to keep them functioning as intended. • Maintain headwalls to the road shoulder level with material that will resist erosion. • Maintain energy dissipators at culvert outlets with non-erodible material or rock. • Keep ditches,culverts,and other drainage structures clear of obstructions and functioning as intended.