ENVIRONMENTAL REVIEW—NEPA
SIERRA NEVADA REGION
Major initiatives are the large projects that SN is currently involved in. As new projects are added, and existing ones completed, you will find current information and updates in this area.
ENVIRONMENTAL IMPACT STATEMENT—EIS
- Wildfire Risk Reduction, Reliability, and Asset Protection (WRAP) Project
- Colusa-Sutter (CoSu) transmission line project
- San Luis transmission project
- Sacramento area voltage support
- Trinity PUD interconnection project
- Alternative intake project transmission line and interconnection
- Delta-Mendota Canal/California aqueduct intertie (PDF – 17MB)
- Sutter power project
ENVIRONMENTAL ASSESSMENT—EA
- Beale-WAPA Interconnection Project (BWIP)
- San Joaquin Valley right-of-way maintenance project
- North area right-of-way maintenance project
- Sacramento Valley right-of-way maintenance project
CATEGORICAL EXCLUSIONS—CX
2023
- Captain Jack Olinda Spacer Replacement 3 Helicopter Landing Zones (2MB)
- Path 15 Access Road Repairs 2023 (3MB)
- CPJ-ODA Helicopter Landing Zones for Spacer Replacement 2024 (2,483KB)
- Olinda Tracy 6 Helicopter Landing Zones near Towers 168, 171,172,177,179,183 (2MB)
- Olinda Tracy Tower 84-1 Helicopter Landing Zone (390KB)
- Trinity off ROW Tree Removal CX 2023 (390KB)
- Cottonwood-Substation Section G Property Acquisition CX 2023 (1890KB)
- Olinda-Tracy 3 Landing Zones for Towers 92-1 and 174-2 and 164-4 (193KB)
2022
- Captain Jack Olinda Landing Zone for Tower 497 Repair (177KB)
- Path 15 2022 Access Road Repairs (183KB)
- Malin-Round Mountain Tower 71-8 Spacer Replacement Landing Zone (176KB)
- Captain Jack Olinda Spacer Replacement Helicopter Landing Zones (2,529KB)
- Olinda Tracy Tower 166-1 Landing Zone (327KB)
- Washoe Project Rate Adjustment (329 KB)
- Hurley Tracy Insulator Replacement Landing Zones (320 KB)
2021
- Trinity Public Utility District Fiber Sharing (2MB)
- Path 15 2021 Access Road Repairs (329KB)
- COTP Mt. Oso Communication Site Repairs (321KB)
- Airport-Cottonwood 230-kV Tower 9/4 Off-ROW Tree Removal (2MB)
- Trinity-Weaverville and Trinity-Carr Off-ROW Tree Removal (3MB)
- Captain Jack-Olinda 500-kV Tower 479 Off ROW Tree Removal (2MB)
- Captain Jack-Olinda 459 Spacer Replacement Landing Zone (PDF 2MB)
- Airport-Cottonwood 230-kV Tower 14/1 Off ROW Tree Removal (PDF 2MB)
- Carr-Keswick Tower 4/4 Replacement Project (PDF 224KB)
- CAR KE 230-kV Off ROW Weed Control CX-2021 (PDF 2MB)
- Friant Tap and Columbia Mowry 12-kV Lines Vegetation Management (PDF MB)
- COTP Microwave Radio Antenna Installation at RAH and OSO (PDF 2MB)
- Folsom Roseville Off-ROW 2/2 Hazard Tree Removal (2 MB)
- Lawrence Livermore to 424 ROW Vegetation Removal (PDF 2.46MB)
- Byron-Bethany 69-kV ROW Vegetation Removal (PDF 2.44 MB)
2020
- 2020 Path 15 500-kV Transmission Line Access Road Erosion Repair (PDF 336 KB)
- Carr-Keswick Tower 4/4 Replacement Project (PDF 81 KB)
- Rate Adjustment and Sales of Surplus Energy Products, 2021-2024 (PDF 73 KB)
- Tree Trimming for CVP#3 Comprehensive Specification 200101 (PDF 2 KB)
- Trinity Off-ROW Hazard Tree Removal (PDF 2 KB)
- Open Access Transmission Tariff (OATT) Revision 20-01 (PDF 70 KB)
2019
- Trinity off-ROW tree removal (PDF 214 KB)
- Path 15 Access Road Repairs (PDF 210 KB)
- Sierra Nevada Exploration of Energy Imbalance Market (PDF 1 MB)
- Keswick Substation New Access Road Project (PDF 67 KB)
- Off-ROW hazard tree removal: Folsom-Nimbus (PDF 2 MB)
- Streaming HD Video, Orthophotography, Still Photography, and LiDAR Project (PDF 76 KB)
- Access road erosion repair along the Path 15 500-kV transmission line (PDF 717 MB)
- Pleasant Valley Substation Pole Replacement and Switch Installation Project (PDF 4 MB)
2018
- Malin-Round Mountain off right-of-way tree removal (PDF 2 MB)
- Osprey nest platform installation at New Melones Lake (PDF 744 KB)
- Spring Creek-Keswick Fiber Optic Cable install (PDF 625 KB)
- Keswick Substation video monitoring install (PDF 565 KB)
- Livermore Substation Sanitary Facility upgrades CX (PDF 2 MB)
- Carr Substation Security Upgrades Project CX (PDF 2MB)
- Hazard Tree Removal: Round Mountain-Cottonwood and Keswick-Olinda Transmission Lines (PDF 388 KB)
2017
- Folsom Lake Dam Substation Security Upgrades Project (PDF 3 MB)
- Path 15 2017 Access Road Erosion Repair CX (PDF 3 MB)
- New Melones Substation Security Upgrades (Card Reader) Project (PDF 602 KB)
- Westlands Pump Installation Project CX (PDF 937 KB)
2016
- Trinity-Weaverville Off-ROW Tree Removal
- Grapevine Pass Access Road Project CX (PDF 16 KB)
- Trinity-Weaverville Off-ROW Tree Removal (PDF 2.90 MB)
- DOE Environmental Review for Long-Term Power Purchase (2018-2022) CX (PDF 2 MB)
- Natomas Community Gardens Access Road CX (PDF 4 MB)
- Western Sierra Nevada Power Marketing Program 2025 (PDF 767 KB)
- Grapevine Pass Communications Project (PDF 2 MB)
- Keswick-Airport Towers 3/2 and 3/3 Access Roads (PDF 3 MB)
- 2016 Access Road Erosion Repair Along the Path 500 kV T-Line (PDF 2 MB)
2015
- Contra Costa soil testing and equipment upgrades CX (PDF 5 MB)
- Bear Spring Microwave Site Firebreak Clearing (PDF 4 MB)
- Elverta Washrack, Paving, and Drainage Repair Categorical Exclusion (PDF 4 MB)
- Malin-Round Mountain Emergency Off-ROW Tree Removal (PDF 4 MB)
2014
- 2014 access road erosion repair along the path 15 500 kV transmission line (PDF 6 MB)
- COTP river crossing tower painting project CX (PDF 4 MB)
2013
- Cottonwood-Roseville OPGW project CX (PDF 6787 KB)
2012
- Path 15 access road maintenance-2012 (PDF 3.2 MB)
2011
- Off ROW hazard trees-Trinity-Weaverville 60kV (PDF 725K B)
- Maxwell-O’Banion OPGW (PDF 3.3 MB)
- EMF remodel (PDF 2.37 MB)
- Red Bluff pumping plant 60 kV interconnection project (PDF 585 KB)
- Roseville Elverta (RSC-ELV) OPGW replacement project (Word 63 KB)
2010
- Eastshore Trail construction CX (PDF 1.15 MB)
- Laurel and Rose CX (PDF 453 KB)
- Rock Slough pole replacement (PDF 2.17 MG)
- Vegetation management-CX100501 (PDF 200 KB)
- Vegetation management-CX100502 (PDF 186 KB)
- Culvert cleanout-CX100503 (PDF 156 KB)
- Tracy double breaker double bus project (PDF 266 KB)
- Trinity line cat building-CX101101 (PDF 266 KB)
- Off ROW hazard trees-phase 1 (PDF 242 KB)
- CVP COTP ACI path 15 rate CX (PDF 242 KB)
Last modified on November 28th, 2023