The contractor will review existing data from private or government entities that would aid future analysis and design. It is assumed this data should consist of fish use and habitat surveys, stream flow data, historical air photos, geomorphic field survey, hydrology, and hydraulic analysis. To better understand local river process, including fluvial geomorphology and sediment delivery, the creek will be walked within the site boundaries and a sufficient distance up and downstream to gain a reach level understanding of present conditions. An overview of current reach conditions will be documented with general field notes and photos. Obvious infrastructural elements such as riprap, levees, bridges, irrigation diversions, well heads, power lines, building foundations, and/or other such elements should be included in the 30% design. Hydraulic analysis - LIDAR data may be used to complete hydraulic modeling and floodplain cross sections. Manning’s n values will be estimated from reference literature, professional experience and opinion...
