Lower Colorado Region Environmental Documents

Links to Lower Colorado Region Area Office Environmental Documents

Phoenix Area Office: https://www.usbr.gov/lc/phoenix/

Southern California Area Office: https://www.usbr.gov/lc/socal/envdocs.html

Yuma Area Office: https://www.usbr.gov/lc/yuma/environmental_docs/environ_docs.html


Regional Office Environmental Documents

Dennis Underwood Conservation Area
      Draft Environmental Assessment/Initial Study with a Negative Declaration - October 2018 (PDF, 2 MB)
      Appendix A - October 2018 (PDF, 2 MB)
      Appendix B - October 2018 (PDF, 854 KB)
      Appendix C - October 2018 (PDF, 423 KB)

Laughlin Races and Events
      Finding of No Significant Impact - September 2018 (PDF, 373 KB)
      Laughlin Races and Events Environmental Assessment - September 2018 (PDF, 1 MB)

Finding of No Significant Impact and Supplemental Environmental Assessment for Planet Ranch Conservation Area
      Finding of No Significant Impact and Final Environmental Assessment - July 2018 (PDF, 2 MB)

Right of Use - Downgradient Study Area Activities
      Finding of No Significant Impact and Final Environmental Assessment - March 2018 (PDF, 4 MB)
      Draft EA Right of Use Downgradient Study Area - January 2018 (PDF, 3 MB)

Finding of No Significant Impact for Final Environmental Assessment for the Final Amendment to add Northern Mexican Gartersnake to the Lower Colorado River Multi-Species Conservation Program as a Covered Species
      Final Environmental Assessment - February 2018 (PDF, 2 MB)
      Finding of No Significant Impact - March 2018 (PDF, 80 KB)

Hoover Dam Fiber Optic Cable Replacement
      Finding of No Significant Impact and Final Environmental Assessment - March, 2018 (PDF, 6 MB)
      Draft Environmental Assessment - December 2017 (PDF, 4 MB)

Planet Ranch Conservation Area
      Finding of No Significant Impact and Final Environmental Assessment for Planet Ranch Conservation Area - March 2018
      (PDF, 5 MB)
      Draft Environmental Assessment - December 2017 (PDF, 12 MB)

Finding of No Significant Impact for Alternative 1 from the Final Environmental Assessment for the Southern Nevada Intertie (Harry Allen to Eldorado 500 kV Transmission) Project
      Final Environmental Assessment - November 2017 (PDF, 13 MB)
      Finding of No Significant Impact - September 2017 (PDF, 112 KB)

Washington County Water Conservancy District WaterSMART Small-Scale Water Efficiency Projects
      Finding of No Significant Impact and Final Environmental Assessment LC-17-27 (PDF, 787 KB)

TransWest Express Transmission Project LC-UC-16-17
      Volume 1 - Record of Decision - June 2017 (PDF, 23 MB)
      Volume 2 - Record of Decision - June 2017 (PDF, 318 MB)

Arizona Heritage Trail System
      Arizona Heritage Trail System Draft Environmental Assessment - April 2017 (PDF, 2.6 MB)

Toquerville Secondary Water System Smart Meter Installation Project
      Finding of No Significant Impact and Final Environmental Assessment LC-17-08 - February 2017 (PDF, 808 KB)


Archived Lower Colorado Regional Office Environmental Documents - Alphabetical Listing

Archived Lower Colorado Regional Office Environmental Documents - Chronological Listing

Last Updated: 11/7/18