Master Drainage Model Update

The Central Florida Tourism Oversight District (CFTOD), formerly known as the Reedy Creek Improvement District (RCID), (hereinafter "District", "Owner" and "CFTOD") is a Special Taxing District that serves as a local government entity. One of the primary responsibilities of the District is to maintain flood control of the master drainage system which serves approximately 24,500 acres within the District's boundary, as well as the adjacent developments of Golden Oak and Celebration. In addition, approximately 123 square miles of offsite tributary area drain to the District's master drainage system from adjacent Orange, Osceola, Lake and Polk Counties. The master drainage system is comprised of approximately 67 miles of canals, as well as, portions of natural creek and swamp topography, which include Whittenhorse Creek, Davenport Creek and Reedy Creek. The system is controlled by 25 primary water control structures, including weirs and amil gates. Please see Attachment 1 for an overview map of the District and master drainage system.

The District has a long history of modeling the master drainage system and is responsible for maintaining and updating the master drainage model for its flood control system. This project serves as a major update to the model and consists of three primary objectives. The first objective is to migrate the District to current modeling software, moving away from an obsolete customized model that used UNET and HEC-1, as well as newer regional model components utilizing ICPR 3 and 4. With the widespread agency and industry acceptance, combined with prior District testing regarding capabilities and the ability to accurately model amil gates, the District will be transiting the model to Interconnected Channel and Pond Routing Model 4 (ICPR4) and GIS. The second objective is to update the model to adequately reflect the significant development that has occurred within the tributary areas as well as, update onsite areas to future land use conditions to maintain consistency with the District's Comprehensive Plan. The final objective is to convert the model from a local datum to State Plane/NAVD 88. This Project will be split into seven (7) zones as shown in the table below and Attachment 2. The zones are interconnected, therefore each zone will build upon the previous zone. However, each zone will have separate deliverables and check points.