Quiota Creek Fish Passage
Subsequent to completion of the Quiota Creek Fish Passage Enhancement Plan, HDR was selected to complete detailed design drawings, technical specifications, and engineer's opinion of probable construction costs for 9 consecutive fish passage projects within critical Southern California steelhead habitat along Quiota Creek. Each project included the replacement of concrete slab low-flow stream crossings with either a prefabricated concrete arch bridge system or a vented ford. Design tasks included HEC-RAS modeling, instream channel design, scour countermeasures, rock profile control structures, and fish habitat features. All designs were closely coordinated with CDFG and NMFS design reviewers. Throughout design, the design team provided grant writing support and helped leverage over $2 million dollars in construction funds. HDR provided construction oversight for Crossing 6 and Crossing 2 in 2011. Construction oversight included: direct collaboration with contractors; on-site construction observation; field-fit construction oversight for habitat elements and streambed features; review of RFIs and shop drawing submittals; review of payment requests; and final project walk-through. HDR continues to perform annual passage evaluation reports for each of the constructed projects.