Trinity River COMMON VISION Program

Corridor Development Certificate

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.

More Information

• Fourth Edition of the CDC Manual [PDF]
• Fill-in Application Forms from Section 3 of the 4th Edition
  • CDC Application Checklist [Word] | [Rich Text]
  • CDC Application, Parts 1 & 2 [Word] | [Rich Text]
  • Final CDC Action/Findings Form [Word] | [Rich Text]
  • CDC Extension Request [Word] | [Rich Text]
• Third Edition of the CDC Manual
• CDC Introduction
• Frequently Asked Questions about the CDC Process [PDF - Revised]
• CDC Process Flow Chart [NEW]
• CDC Mapping Sheets
• CDC Permit Map
• CDC Permit Summary Tables
• USACE Dallas Floodway Extension