Environmental Assessment
Both the Tarrant and Johnson County portions of State Highway (SH) 121 were initially cleared through the environmental process. In compliance with the National Environmental Policy Act, environmental re-evaluations are required of the projects to address any modifications such as adding electronic tolling or changing the construction phasing, as was previously disclosed in Johnson County, before construction can begin.
The re-evaluation for SH 121 Southwest Parkway in Tarrant County has been completed. Staff is currently in the process of re-evaluating the SH 121 Chisholm Trail portion in Johnson County, assessing the additional elements of electronic tolling, shifting the alignment near U.S. 67 and stage construction modifications.
Environmental Assessment
| Title | Format |
| SH 121 / Chisholm Trail Environmental Assessment |  |
| Appendix A | |
| Appendix B-1 | |
| Appendix B-2 | |
| Appendix C | |
| Appendix D | |
| Appendix F | |
| Appendix G | |
| 2003 Public Hearing Summary and Analysis | |
| 2010 Public Involvement Package | |
| 2011 Environmental Assessment Re-Evaluation - Final | |
| USACE Section 404 Permit | |
| Decision Document Nationwide Permit #14 | |
| Supplement to Decision Document Nationwide Permit #14 | |
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