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Title
Professional Engineering Services Contract with Halff Associates, Inc. for Floodplain Permitting Assistance Associated with TxDOT I-30 Improvements in Grand Prairie in the amount of $68,000
Presenter
Stephanie Griffin, Floodplain Administrator, and Walter Shumac, Director of Transportation
Recommended Action
Approve
Analysis
The Texas Department of Transportation (TxDOT) is constructing improvements along the access roads of Interstate 30 (I-30) between Beltline Road and Highway 161 in Grand Prairie. TxDOT has asked the City to assist with the floodplain permitting requirements for CSJ 1068-04-149 (Project 149) as the City will benefit from the improvements.
The floodplain requirements for the project include:
· Corridor Development Certificate (CDC) application and permit
· Floodplain Development Permit (FDP) application and permit
· Conditional Letter of Map Revision (CLOMR), if necessary
· Letter of Map Revision (LOMR)
Grand Prairie participates in the Trinity River Corridor Development Certificate (CDC) program that is coordinated by the North Central Texas Council of Governments (NCTCOG). The CDC involves an engineering model, HEC-RAS, to be updated to show the impact of proposed projects along the Trinity River. This information is then shared with and reviewed by upstream and downstream communities, as well as the United States Army Corps of Engineers and State agencies. These entities have the opportunity to voice concerns they may have with the proposed improvement before it is constructed.
The FDP is the City’s floodplain development permit that is required for all projects located in floodplains within the City. The City is required by the Federal Emergency Management Agency (FEMA) to document all work that takes place within the FEMA-regulated floodplains. The FDP is the City’s mechanism used to meet this FEMA requirement. Again, a HEC-RAS model is required to show the impacts of the proposed project considering exis...
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