The Corridor Development Certificate (CDC) process aims to stabilize flood risk along the Trinity River. The CDC process does not prohibit floodplain development, but ensures that any development that does occur in the floodplain will not raise flood water levels or reduce flood storage capacity. A CDC permit is required to develop land within a specific area of the Trinity floodplain called the Regulatory Zone, which is similar to the 100-year floodplain.
Under the CDC process, local governments retain ultimate control over floodplain permitting decisions, but other communities along the Trinity River Corridor are given the opportunity to review and comment on projects in their neighbor’s jurisdiction. As the Metroplex economy continues to grow and develop, the CDC process will prevent increased flood risks.
View the interactive map of CDC Permits
Instructions for mapping application
Fourth Edition of the CDC Manual Amended 2017
Fill-in Application Forms from Section 3 of the 4th Edition
CDC Application Checklist
CDC Application, Parts 1 & 2
Final CDC Action/Findings Form
CDC Extension Request
Template Letters to request review (to be sent with application)
USACE Review Letter Template
NCTCOG Review Letter Template