Will Rogers Downs Drainage Improvements

Meshek was hired by Cherokee Nation Enterprises to update the FEMA Zone A floodplain at the Will Rogers Downs racetrack and casino. This involved using new hydrologic and hydraulic models against current topography to map changes in the floodplain boundary.  This information was then submitted to FEMA. This study was needed because the existing Zone A floodplain was more extensive than what experience and current modeling would indicate, while also not giving adequate information about the depth of flooding.

The team conducted a detailed hydrologic study using a 2D model to develop unit hydrograph stream flows. These flows were then used to generate annual exceedance floodplains and base flood elevations. The resulting documents and data, including topographic work maps, annotated FIRM map panels, and floodplain mapping, were compiled into a submittal package for FEMA's review and approval. Our engineering staff responded to several comments from FEMA and made necessary corrections to the submittal documents and data. We worked closely with FEMA reviewers to ensure an approved  LOMR (Letter of Map Revision). 

Cherokee Nation Enterprises now has a much better picture of their flood risks on this important revenue-earning property, including how to best manage and develop the site in accordance with these flood risks.