Specifications include, but are not limited to: 1. Design Support and Preliminary Studies: Consultant shall be responsible to provide all engineering support and preliminary services required for design of this project. These task are expected to include, at a minimum: Supplement Topographic Surveying for the mapping of the bridge site and vicinity with 1-foot contour intervals, wetted channels, large trees, adjacent USFS property line, and other features. Include cross-sections above and below the bridge site and specified intervals (100 feet) as required for the hydrology report. Hydraulic Analysis model various flood intervals (2-year, 10-year, 25-year, 50-year, 100- year, and 500-year) and associated water velocities and scouring potential. Geomorphology and Geotechnical model stream channel and floodplain geomorphology and evolution over time, including the rate of sediment aggradation due to the proximity of Lake Siskiyou. Excavate test pits at proposed bridge pier locations to determine depth to consolidated material. Preliminary Design and Engineering work with pre-fab steel truss bridge supplier to determine bridge pier and abutment engineering needed. Bridge supplier should provide engineering for bridge spans, consider flood heights, hydraulics, large logs ramming piers, and rising streambed due to lake, as well as anticipated bridge uses/loads and snow load. Also include trail approaches on both sides of river extending upriver from the existing Lake Siskiyou Trail, planning and a wide trail (8 feet) and ADA compliance relative to grade, with potential future trail paving. Also include trail signage, benches, and potential previously-designed improvements of Delta parking area and trailhead. Design of restoration of adjacent wet meadow could also be included, which could serve as mitigation for impacts to riparian zone. Associated with bridge installation, as might be required by regulatory permits. Staging and traffic detour plans must be developed if needed. Summary of Expected Deliverables: • Hydraulic Report • Geotechnical Report • Floodplain Analysis Report • Materials and Foundation Report • Bridge Type Selection Report 2. Environmental Review, Coordination, Design and Permitting The consultant shall be responsible for necessary special environmental studies and permits, and preparing the necessary national Environmental Policy Act (NEPA) and California Environmental Quality Act (CEQA), conduct biological studies (wetlands, ordinary high water mark, riparian, species of concern known to be nearby, etc.) and cultural resource survey (historic such as Spini Ditch and old railroad grade) and prehistoric (Native American sites, though not likely present). Initiate agency and public outreach including outreach to users of Chinese Wall and disc golf course. Assist District in determining scope of CEQA compliance and undertake preparation of environmental documents and public process. Regulatory Permits prepare/submit applications for Army Corps 404 permit, WQCB 401 water quality certification and SWPPP, and CDFW 1660 agreement. Include preparation of re-vegetation, adaptive management, and monitoring plans Construction documents prepare construction drawings, details, specifications, and bid form, and add District bidding documents (sample contract, biding instruction, etc.) such that project is ready for bidding. Assist District in seeking construction and post-construction funding that will include direct construction, construction oversight, SWPPP compliance, and post-construction adaptive management and monitoring. Summary of Expected Deliverables: • Environmental Studies and Reports • Environmental Permits • Environmental Documents • Construction Documents • Assist District with finding funding for construction and post-construction
