With approvals falling into place for NV Energy’s Greenlink West project, construction of the 472-mile transmission line is expected to ramp up in 2025. 

The Public Utilities Commission of Nevada (PUCN) on Dec. 20 approved a construction permit for Greenlink West, a 525-kV line that will run along the west side of the state from the Las Vegas region to Yerington in Northern Nevada. The project also includes three 345-kV lines from Yerington to the Reno/Sparks area. 

And on Dec. 31, the PUCN approved a construction permit for a related project: a 10-mile, 345-kV line between the Comstock Meadows and West Tracy substations in Northern Nevada. 

In its application, NV Energy said the Comstock Meadows to West Tracy line must be in service before Greenlink West is finished. The new line will prevent an overload of 120-kV lines when a Greenlink component — a 345-kV line from Fort Churchill to Comstock Meadows — is completed. 

In addition, NV Energy said the line is needed “based on the total load growth in the Tahoe Reno Industrial Center.” The TRI Center is home to Tesla Gigafactory 1, Google, data center company Switch and other businesses. 

NV Energy’s Greenlink Nevada project consists of Greenlink West along with Greenlink North, a planned 235-mile east-west line across the north side of the state. The two Greenlink lines will connect with NV Energy’s existing One Nevada Line, a north-south line along the eastern side of the state, forming a transmission triangle around Nevada. 

Greenlink is seen as a way to improve reliability and promote development of renewable resources in the state. 

The Bureau of Land Management issued a record of decision approving Greenlink West in September. (See BLM OKs NV Energy’s Greenlink West Line.) 

Greenlink West construction is expected to start in the first quarter of 2025 with a targeted in-service date of May 2027.  

For Greenlink North, a comment period for the draft environmental impact statement (EIS) ended Dec. 11. BLM has set target dates of April 11 for publishing the final EIS and July 31 for issuing a record of decision on the project. 

NV Energy expects Greenlink North to be in service by December 2028. 

In 2024, NV Energy bought land next to its Fort Churchill Power Plant near Yerington to build the Walker River substation. The Greenlink West and North lines will meet at Fort Churchill, and NV Energy calls the Walker River substation the “hub” of the Greenlink project. Clearance and grading of the site began in September, NV Energy said on its website. The utility expects the substation to be completed in 2025. 

‘Continued Approval’ Sought

In a separate action Dec. 20, the PUCN declined NV Energy’s request for “continued approval” of the Greenlink project and approval of a $4.128 billion cost estimate, which doesn’t include one of the project’s 345-kV segments.  

Greenlink’s projected cost has ballooned since a cost estimate of $2.484 billion in 2020. NV Energy has blamed inflation, environmental mitigation and other factors for the increase. (See NV Energy IRP Describes $1.76B Cost Jump for Greenlink Projects.) 

The request for “continued approval” was made as part of the utility’s integrated resource plan filed in May. 

In an order approving parts of the IRP, the commission noted it had already approved all the components of the Greenlink project. There’s nothing in Nevada statute that requires “continued approval” of a project that’s being developed, the commission said in its order. 

“‘Continued approval’ implies a presumption of prudence,” the commission said in its order. “The commission does not find it reasonable or in the public interest to grant a request that equates to a prudency approval for unvetted costs.” 

Instead, the Greenlink costs will undergo a prudency review during a general rate case, the commission said. 

The commission did grant NV Energy’s request for critical facility designation for Greenlink West, a designation that was previously granted for Greenlink North. 

Greenlink is needed to protect reliability, is critical to the development of renewable energy resources and will allow energy transfers between northern and southern Nevada, the commission said. 

But the commission said the utility’s request for a construction work in progress (CWIP) incentive should be addressed in a general rate case rather than in the IRP.