WHKS completed bathymetric and topographic surveys of six NRCS reservoirs and two lakes, Silver Lake and Cascade Lake, for the City of Rochester. The field work portion of the project consisted of two phases. The first phase consisted of the land-side survey to establish localized survey control and to gather topographic information along the lake/reservoir shoreline, including the current water surface elevation. This information was used to calibrate the bathymetric survey equipment and to link the bathymetric survey data to the existing land surface contours.
The second portion of the field work included bathymetric and sediment surveys which were conducted concurrently. For the bathymetric and sediment depth survey, WHKS utilized the BSS+ Sediment Mapping System, which is specifically designed to map water and sediment depths in shallow water bodies.
The surveys defined the amount and depth of sediments throughout each of the water bodies and used NAVD88 datum consistent with USACE standards.