Parks and Recreation, Department of
(California Department of Parks and Recreation)
Homestead Horse Trail Culvert Repair
NOE - Notice of Exemption
Replace a failed culvert on the Homestead Horse Trail near Hamilton Barn in Humboldt Redwoods State Park to alleviate the safety hazard and to reopen the section of trail for visitor use. Work will:
Place a temporary culvert at the inboard ditch of Mattole Road to move heavy equipment to the culvert site.
Remove four trees less than 4 inches in diameter at breast height.
Use an excavator to remove 65 cy of crossing fill and the failed culvert (excavation dimensions at the stream crossing will be approximately 20 ft across and 4 ft deep).
Use a bulldozer to remove an additional 30 cy of aggraded sediment, tapering to the natural stream grade about 150 ft upstream of the crossing.
Place a new 4-ft diameter by 20-ft length corrugated steel pipe on the original stream grade.
Use an excavator and/or bulldozer to backfill over the new pipe in one-ft lifts and use a gas powered wacker to compact the soil in succession until the culvert is buried and the original trail elevation is reached.
Use dump truck to transport excess spoils material to an established storage site at the Hamilton Bone Yard.
Build a dry-stack rock headwall at the culvert inlet and oulet to protect crossing fill.
Import base rock, spread, and compact on the final trail surface.
Spread native mulch and revegetate disturbed areas the following winter.
Project consists of the repair, maintenance, or minor alteration of existing structures or facilities, involving negligible or no expansion of an existing use, replacement or reconstruction of existing structure and facilities where the new structure will be located on the same site as the structure replaced and will have substantially the same purpose and capacity as the structure replaced, and minor alterations in the condition of land, water and/or vegetation that do not involve removal of healthy, mature, scenic trees; included as "trail or road repairs" and trail construction or realignment" in the Parks and Rec's list of exempt activities, in accordance with CCR 15300.4.