ESP also supported FEMA’s Coordinated Needs Management Strategy (CNMS). This digital inventory of all FEMA mapped streams is evaluated and checked every five years to assess the adequacy of floodplain mapping. Our team performed validation for more than 11,000 miles of streams. The validation process involves the compilation of numerous data sets that impact floodplain mapping (e.g., land use, topography, gage data, etc.) and a series of detailed checks to assess the magnitude of changes and the subsequent validity of effective floodplain boundaries. The validation effort also included base level engineering (BLE), hydrologic and hydraulic (H&H) modeling, and floodplain mapping for nearly 3,000 miles of streams to assess potential floodplain changes.

Additionally, ESP performed flood insurance study (FIS) updates for five watersheds, covering portions of 18 counties and totaling approximately 5,500 square miles. This work involved restudying more than 600 miles of streams and producing updated FIS products. ESP’s task orders and support also included independent technical review of engineering analysis and mapping associated with approximately 400 miles of flood study updates and 2,200 square miles of 2D modeling; lidar acquisition and enhanced processing of lidar for five counties totaling nearly 3,000 square miles; and development of a web-based portal for viewing general and watershed-specific flood information.