State Route 14 Red Rock Canyon Bridge Project - Agreement 2012-0099-R4

State Route 14 Red Rock Canyon Bridge Project - Agreement 2012-0099-R4

The California Department of Fish and Game is executing a Lake and Streambed Alteration Agreement, pursuant to Section 1602 of the Fish and Game Code, to the Project applicant. Caltrans proposes to replace the Bridge 50-178 on SR 14 at Red Rock Canyon Wash currently 60 feet wide with a new 72 foot wide bridge. The highway shoulder to the approaches to the bridge will also be widened to 10 feet from just south of the bridge approximately 12 feet. The current 77 columns 18 inches in diameter will be reduced to 48 columns 30 inches in diameter, a reduction of 13.5 cubic yards (cu-yd.) of fill compared to the previous bridge. Permanent impacts to Red Rock Canyon Wash include 0.007 acres of unvegetated channel bed where the bridge columns will be installed. The Project also includes 5.6 cu-yd. of Rock Slope Protection and temporary impacts to 0.038 acres of Baltic rush dominated wetland. Some construction equipment will need to enter the channel, but will not be stored there when not in use. Equipment staging will be located at a large previously disturbed turn out on the west side of SR 14 south of the bridge. Work will be done during the dry season when water is not present; therefore, a Water Diversion will not be required. The Project will require cutting back a red willow. Topsoil removed in areas near Red Rock tarplant populations will be collected and spread to preserve the seed bank.

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