Spur 399 Extension Environmental Impact Statement From US 75 to US 380

CSJ: To Be Determined

Project Description

TxDOT is undertaking public involvement, schematic design, and an in-depth environmental study for the Spur 399 Extension project from US 75 to US 380. The project provides for development of a freeway facility to improve north-south mobility and connectivity of travelers from eastern Collin County to destinations south of McKinney, including the Dallas Metroplex. The existing Spur 399 is approximately 0.5 miles long and serves as a transition between and SH 121/Sam Rayburn Tollway (SRT) and SH 5, south of McKinney. The project area is shown below.

TxDOT began this project in May 2020 and anticipated completion is late 2022. The project adheres to the National Environmental Policy Act (NEPA). The level of documentation identified is an Environmental Impact Statement (EIS) which will assess alternatives and outline impacts of the proposed project on the surrounding environment.

Alignments Under Consideration

The project will build on TxDOT’s US 380 Collin County Feasibility Study that was conducted from 2017-2020. Feasibility Study information can be viewed here. TxDOT will continue to consider its recommended feasibility study alignment, other viable alignments or changes to alignments, and a no-build alternative. 

For an EIS, the study must include an assessment of all alternatives considered, and it is possible that the best alternative identified during that evaluation could differ from the recommended alignment from the Feasibility Study.

Notice of Intent

Notice of Intent to Prepare an Environmental Impact Statement for Spur 399 Extension, Collin County

How to Get Involved

TxDOT plans to host a public scoping meeting in early 2021, a second public meeting in the fall of 2021, and a public hearing in 2022 that will allow the public to learn more about the project and provide input on proposed improvements. Sign up here to receive more information and receive meeting notices.

Project Contact

For questions or comments, please contact:
Stephen Endres, P.E.
(214) 320-4469