Corridor Development Certificate Program

The Trinity River CDC website is currently down for routine maintenance. Access to the Qntrl website login and the NFIP-CDC Consolidated Model can be found below.

Floodplain Administrator Login (Qntrl website)
NFIP-CDC Consolidated Model Upload (Updated as of Feb. 15, 2024)

East Fork & Main Stem Trinity River NFIP Preliminary Model (updated 5/28/24)
DISCLAIMER: This is a FEMA revised preliminary model, updated as of 5/28/24.  This model is NOT regulatory, but is considered the Best Available Data, replacing the 2014 model. The FEMA Effective model with tie-ins will need to be submitted in conjunction with this updated model.

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.

As an effort requested of the North Central Texas Council of Governments (NCTCOG) by its members associated with enhancing the Trinity River Common Vision program’s administration, a new CDC tracking method and model storage system has been developed and launched October 1, 2020. The new website, is now the location to access documents and information about the CDC program.

Launch the Interactive Mapping Application

View Flyer Outlining October 1, 2020 Changes

Fourth Edition of the CDC Manual Amended 2020


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


More Information