The Environmental Team at Desert Southwest (DSW) provides specialized support to the Region to maintain compliance with the National Environmental Policy Act. Some actions may have environmental impacts that require an environmental assessment (EA) and a detailed analysis to determine the extent and severity of the impacts. For actions that have significant impacts or consequences to the environment or human health, environmental impact statements (EIS) are prepared. Other minor actions produce documents like categorical exclusions (CX). In order to promote transparency and openness, the various types of environmental documents are posted below.

Categorical Exclusions—CX

​Operation and Maintenance program-wide

  • ​Exploration of Energy Imbalance Market​ ​
  • Ad​ams Tap MOI and Control Building Replacement (9-11-13)
  • Casa Grande Substation, CAG 262 Breaker Replacement (4-4-13)
  • COLORA – Cross-Arm Replacement, Structure Nos. 12-3, 12-6 (9-23-13)
  • Davis Dam to Kingman Tap 69-kV Transmission Line, Overhead Optical Power Ground Wire Installation (5-16-13)
  • Davis Dam to MEC Kingman Tap 69-kV Transmission Line Rebuild (3-20-13)
  • Davis-Parker 230kV Transmission Line – Marker Ball(s) Replacement (12-17-13)
  • DSWR – Bi-Annual “Live Line” Maintenance Training (10-08-13)
  • Electrical District 2 to Saguaro #2 115-kV Transmission Line Access Road Maintenance between Structure 26/8 and 26/9 (5-20-13)
  • Gila Substation Emergency Current Transformer Replacement (4-26-13)
  • 3 Yuma Area Transmission Lines Emergency Storm Damage Repairs (8-26-2013)
  • GCS Switchyard – 230-kV Wavetrap Removal – TZ9A2 on the Navajo Line (6-21-13)
  • Gila Knob Transmission Line Crossarm Replacement at Structure 18/3 (06-03-2013)
  • Gila Knob Transmission Line Hot Crossarm Changeout Training (12-16-2013)
  • Gila-Wellton Mohawk Transmission Line Maintenance (1-3-13)
  • Glen Canyon Substation Stage 09- 50MVA 230/69kV Transformer Addition (7-2-13)
  • Glen Canyon to Flagstaff #2 345-kV Transmission Line, Access Road Maintenance from Structure 45/4 to 46/1 (8-8-13)
  • Henderson Mead #2 Erosion Control Project Near Structure 2/4 (9-11-13)
  • 40 Arizona Substations Herbicide Application (7-1-13)
  • 4 Southern California Substations Herbicide Application (7-1-13)
  • 1 Gila River Indian Community Substation Herbicide Application (7-1-13)
  • 2 Navajo Nation Substations Herbicide Application (7-1-13)
  • 4 Southern Nevada Substations Herbicide Application (7-1-13)
  • 36 Substations in AZ & CA Herbicide Application during FY2013 (4-19-13)
  • Lone Butte Substation located on the Gila River Indian Community, AZ during FY2013 Herbicide Application (4-24-13)
  • Hoover-Mead #1 and #5 230-kV and Mead-Marketplace 500-kV Transmission Lines Facilities Ratings Project (3-20-13)
  • Hoover-Mead #8 230-kV Transmission Line Insulator Repair Project (3-11-13)
  • Oracle Electrical Substation Installation of Cattle Guard (5-9-13)
  • Liberty-Parker Dam #2 230-kV Transmission Line, Optical Power Ground Wire Repair (08-22-2013)
  • LIBPAD-1 230 kV Transmission Line “Live Line” Maintenance Training at Structure 112-4 (10-25-2013)
  • Liberty Substation Transformer Replacement Project, Maricopa County, Arizona (06-06-2013)
  • Electrical District 5 Substation Project Material Source Site (2-28-13)
  • Mead KU2A Emergency Bushing Replacement (7-2-13)
  • Nogales Substation Temporary Laydown Yard (3/28/13)
  • Oracle Substation – Breaker Support Work (10-30-13)
  • Oracle to Tucson 115-kV Transmission Line, Cross Arm Replacements at Structures 2/5 and 7/3 (5-2-13)
  • Parker Dam to Gila 161-kV Transmission Line, Cross Arm Replacement at Structure 0/7 (7-22-13)
  • Parker Dam to Headgate Rock and Parker Dam to Bouse 161-kV Transmission Lines, Cross Arm Repairs and Helicopter Staging Areas Project (2-19-13)
  • Parker-Gila 161-kV Transmission Line Maintenance Project, Structure 92/1 to 94/9 (6-5-13)
  • Parker-Gila 161-kV Transmission Line – Structure 109-8 Relocation (12-18-13)
  • Parker Substation 161-kV 2013 Breaker Replacement (5-17-13)
  • 44 Substations in Arizona, California, and Nevada Pest Control within Buildings (6-6-13)
  • Phoenix to Lone Butte 230-kV Transmission Line, Bird Diverter Installation (4-8-13)
  • PHX-LOB and LIB-LOB 230-kV double-circuit – replace insulators at Structure No. 28-2 with NCI type polymers (8-12-13)
  • Pinnacle Peak – Rogers 230-kV Double Inset Structure #5/1a Installation (6-28-13)
  • Prescott to Peacock 230-kV Transmission Line Hazard Tree Removal between Structures 54/1 and 107/1 (11-22-2013)
  • Protection and Communication Facilities Maintenance (11-8-13)
  • Oracle Breakers 562 and 762 Removal and Replacement along with Associated Disconnects (7-2-13)
  • Saguaro-Tucson 115-kV Transmission Line Road Maintenance and Brushwork (4-30-13)
  • Saguaro-Tucson 115-kV Transmission Line, Structure Replacement at 10-4 (12-3-13)
  • Tucson Apache Emergency Structure Stabilization Project (9-6-13)
  • Tucson to Apache 115-kV Transmission Line Wood Pole Replacement Project (2-28-13)

Last modified on June 5th, 2024