Duck Creek Letter of Map Revision


City of Richardson


Service: Floodplain Management

Duck Creek Letter of Map Revision


Duck Creek, and one of its major tributaries, are the primary channels running through the city of Richardson. Duck Creek is a major tributary of the East Fork of the Trinity River. Walter P Moore was tasked with updating the creek’s existing floodplain map. A complete hydrologic and hydraulic analysis of the Duck Creek watershed in support of a revision to the Flood Insurance Rate Map to reflect channel modifications, bridge crossing additions and updates, and development in the watershed was performed. The 1% and 2% storms, and floodway were re-delineated to reflect the updated conditions. The analysis was submitted to FEMA for review and was approved.