Accessibility Trail Improvements Project

Accessibility Trail Improvements Project

Improve accessibility along the Lower Escape Trail and the Sequoia Nature Trail at Portola Redwoods State Park to bring the trails into compliance with California State Parks accessibility guidelines and associated legal mandates. Work will: • Excavate up to 400 cubic yards of soil to o Construct approx. 250ft. of 1ft. wide x 18-inch-high rock retaining walls to support the trail bed and contain trail surface material; o Construct approx. 520ft. of single tiered 1ft. wide x 18-inch-high rock walls on each side of trail causeway; o Construct approx. 462ft. of 4ft. high retaining walls for approaches to a puncheon and to contain elevated trail surface material; o Construct 100ft. of a 10ft. wood retaining wall to contain elevated trail surface material; o Establish drain lenses to allow seasonal drainages to flow under the trail; o Construct 1006ft. of wall-less turnpike edge to establish a firm and stable surface; o Construct 232ft. of wood turnpike edged with 4x8 redwood; o Install up to two (2) abutments for construction of a bridge over Peter’s Creek; o Install two (2) puncheons and at each puncheon, excavate approx. 5 cubic yards to construct/install a rock energy dissipater and swale to route the water under the puncheon; o Establish a rerouted trail into the hillside and remove approx. 9 cubic yards, or less, of soil to construct an asphalt-surface utility vehicle-only path of travel; • Remove approx. 19,150 square feet of existing trail and reroute to comply with the accessibility requirements; • Decompact removed trail alignments and use native seed/mulch to help re-vegetate the trail corridor; • At each trailhead, excavate two (2) 20ft. x 20ft. x 1ft. areas to install accessible parking spaces; • At each accessible entrance to the trail, install two (2) accessible trail information signs, two (2) parking signs, three (3) directional signs, and two (2) interpretive signs. Each 3ft. x 2ft. information sign will be mounted on (2) 4X4 redwood posts, each parking/directional signs will be mounted on (1) 4X4 redwood post, and each interpretive sign will be mounted on two (2) metal posts; • Excavate up to 120 6-inch x 6-inch x 3ft. holes, install up to 120, 4x4 redwood posts and install 650 linear feet of handrails (at various locations) along the trail; • Replace two (2) redwood benches at trail overlooks; and • Remove thirteen (13) standing trees and eight (8) fallen trees along the proposed construction route.

San Mateo

San Francisco Bay Area