Cross Texas Transmission is a transmission service provider that constructs, owns, and operates transmission facilities to help deliver energy to homes and businesses across Texas. Cross Texas Transmission supports several regions across the Lone Star State through its operations and maintenance facilities in Austin and Amarillo.

Through our 345kV system in the Panhandle, Cross Texas Transmission delivers some of the best wind resources in the world to millions of homes and businesses in Texas via several high-voltage transmission lines across Donley, Briscoe, Carson, Childress, Collingsworth, Gray, Hall, and Wheeler counties in the Panhandle.

Cross Texas Transmission also has facilities in Southeast Texas in the Brazos Valley region and surrounding areas. These facilities have increased reliability, lowered electricity costs, and improved emergency system response capabilities in this region. These and other new assets will continue to help fuel economic growth in South Texas.

DesertLink is an electric transmission utility company with a mission to ensure reliable and cost-effective electric transmission for the Western Grid, with a specific focus on the California Independent System Operator (CAISO) region.

Located along the outskirts of Las Vegas, DesertLink’s 500kV transmission facilities provide an additional connection between Southern California and Nevada increasing import and export capacity for both states, improving reliability, and lowering electricity costs for consumers. DesertLink is located in Clark County, Nevada. The majority of the DesertLink’s facilities are on public lands managed by the U.S. Department of the Interior’s Bureau of Land Management– Southern Nevada District Office, and Bureau of Reclamation – Lower Colorado Region.

Great Basin Transmission South (“Great Basin”), is the co-owner of the One Nevada Transmission Line (“ON Line”). Great Basin developed and jointly constructed ON Line with NV Energy. Great Basin’s transmission facilities are the first and only connection between NV Energy’s northern and southern utility systems and enable the development of numerous renewable energy projects in Nevada.

ON Line includes a total of 239 circuit miles of overhead transmission lines (with 231 miles of single circuit 500 kV) and associated transmission facilities connecting the Harry Allen Substation north of Las Vegas with the Robinson Summit Substation located near Ely, Nevada. ON Line also interconnects at Robinson Summit with NV Energy’s Falcon-to-Gonder 345kV transmission line.

Republic Transmission is an electric transmission utility company, with the mission to ensure reliable and cost-effective electric transmission in the MISO region. Connecting southern Indiana and western Kentucky, Republic Transmission strengthens the MISO region’s transmission backbone, lowering electricity costs and facilitating additional renewable resources.

Republic Transmission’s 345 kV transmission facilities connect Vectren’s Duff substation in southern Indiana to Big River’s Coleman substation in western Kentucky, including a crossing of the Ohio River. Approximately three miles of the line is located in Kentucky and is owned and operated by Big Rivers Electric Cooperative, Inc.

Silver Run Electric is an electric transmission utility company with facilities located in Delaware and New Jersey. With transmission facilities traversing an ecologically sensitive area, our team is focused on minimizing or eliminating impacts on the native habitat and ensuring long-term environmental health for the community.  Our facilities support the stability, reliability, and efficiency of the Mid-Atlantic power grid.

Designed to coexist with unique environmental challenges, Silver Run Electric provides a high-voltage connection between the Delmarva Peninsula and southern New Jersey.  Silver Run Electric’s facilities consist of the Silver Run substation and a 230 kV transmission line that runs from the Silver Run substation to the existing Hope Creek substation in Lower Alloways Creek, New Jersey. The 230-kV line includes an approximately three-mile submarine crossing of the Delaware River.

In 2019, LS Power Grid New York, together with the New York Power Authority, was designated by the NYISO through a competitive solicitation to construct, own, and operate the Central East Energy Connect project.

Designed to address bottlenecks that limit the flow of electric power across New York state, LS Power Grid New York’s innovative solutions greatly enhance the capacity of existing lines. Approximately 93 miles in length, the Central East Energy Connect project has a number of different components, each designed to provide an efficient, low-cost solution.

Along most of its length, LS Power Grid New York replaced two sets of aging “H”-frame transmission towers with just one set of modern monopole structures that can move more electricity, more efficiently – the new infrastructure installed along that segment can carry approximately five times the capacity of the lines they replaced. The project also included upgrades at several existing substations and the construction of two new, indoor gas-insulated substations using state-of-the-art technology. By using existing rights-of-way and today’s best technologies, LS Power Grid New York helped minimize the impact on residents and communities.

In 2023, Silver Run Electric was selected by PJM through a competitive solicitation process to construct, own, and operate, the Silver Run Expansion Project. The existing submarine cables under the Delaware River will become overloaded under certain system conditions resulting from adding future offshore wind energy in New Jersey on the regional electric grid.

The Silver Run Expansion Project addresses these issues by adding additional submarine cables to the existing transmission path between the Silver Run substation in Delaware and the Hope Creek substation in New Jersey. These new cables will increase the capacity of the transmission line, contribute to New Jersey’s renewable energy goals, and strengthen the electrical grid in the Mid-Atlantic region.

In 2020, LS Power Grid California was selected by CAISO through a competitive solicitation to construct, own, and operate the Gates 500kV Dynamic Reactive Support Project. Once placed in service in 2024, the new Orchard Substation will provide critical reliability for the CAISO grid in California’s San Joaquin Valley by mitigating high voltages and thermal overloads.

LS Power Grid California’s Orchard Substation will include an approximately 800 MVAR static synchronous compensation (STATCOM) device to be installed in two equally-sized blocks, each independently connected to PG&E’s Gates 500kV Substation.

In 2020, LS Power Grid California was selected by CAISO through a competitive solicitation to construct, own, and operate the Round Mountain 500 kV Area Dynamic Reactive Support Project. After completion, the new Fern Road Substation will provide critical reliability for the Northern California grid by eliminating chronic high voltage issues on PG&E’s system and addressing wide voltage variability resulting from increasing solar generation in CAISO.

The Fern Road Substation will include an approximately 500 MVAR static synchronous compensation (STATCOM) device installed in two equally-sized blocks, each independently connected to PG&E’s Round Mountain to Table Mountain 500 kV transmission lines.

In 2023, LS Power Grid California (LSPGC) was selected by CAISO through a competitive solicitation to construct, own, and operate the 500/230 kV Collinsville Substation Project (Project). The Project will create additional energy supply from the 500 kV system into the northern Greater Bay Area that will advance the development of renewable generation and increase reliability including reducing overloads on the 230 kV system.

The Project will include a new LSPGC 500/230kV Collinsville substation and two new LSPGC 230kV transmission lines, which will be used to tie the existing Pacific Gas and Electric (PG&E) Vaca Dixon to Tesla 500 kV line to the existing PG&E Pittsburg Substation.

The new Collinsville substation will include gas insulated switchgear (GIS), two new 500/230kV transformers, and a 500 kV series capacitor bank on the Collinsville to Tesla 500 kV line. The two new 230kV transmission lines from Collinsville substation to Pittsburg substation will include approximately one to two miles of overhead transmission and four miles of submarine cable to cross the Sacramento River.

The existing Vaca Dixon to Tesla 500 kV line will be looped into the new Collinsville substation by PG&E. PG&E will modify the existing series capacitors at the Vaca Dixon Substation as required.

In 2023, LS Power Grid California (LSPGC) was selected by CAISO through a competitive solicitation to construct, own, and operate the 500/230 kV Manning Substation Project (Project). The Project will enable the advancement of renewable generation within the Westlands/San Joaquin area and address overloads on Pacific Gas & Electric’s (PG&E) 230 kV system.

The Project will include a new LSPGC 500/230 kV Manning substation and two new LSPGC 230 kV transmission lines, which will tie the existing PG&E 500 kV system in the area to the existing PG&E Tranquility Substation to enhance reliability and increase access to cost effective solar generation.

The new Manning substation will include gas insulated switchgear (GIS), two new 500/230 kV transformers and two 500 kV series capacitors banks. The two new 230 kV Manning to Tranquility transmission lines will include approximately 10 miles of overhead transmission supported by tubular steel structures.

The existing PG&E Los Banos to Midway #2 500 kV line, the Los Banos to Gates #1 500 kV line, and the Panoche to Tranquility #1 and #2 230 kV lines will be looped into the new Manning substation by PG&E. PG&E will also modify the existing series capacitors on the Gates and Midway 500 kV lines. Additionally, PG&E will reconductor the existing Manning-Tranquility 230 kV lines.

In 2023, LS Power Grid California was selected by CAISO through a competitive solicitation to construct, own, and operate the Power the South Bay Project (also known as the Newark – Northern Receiving Station HVDC Project). The project addresses reliability needs by strengthening the electrical grid in the South Bay area to improve resiliency, support economic development, and provide better access to cost effective, renewable energy to meet the needs of residents and businesses.

The project includes two new 320 kV high voltage direct current (HVDC) terminals, each with a 230 kV alternating current (AC) gas-insulated switchyard (GIS), approximately four miles of 230 kV AC overhead and underground transmission line, and approximately eight miles of 320 kV direct current (DC) overhead and underground transmission line. The northern end of the project interconnects to Pacific Gas & Electric’s (PG&E) existing Newark substation, and the southern end interconnects to Silicon Valley Power’s (SVP) existing Northern Receiving Station.

In 2023, LS Power Grid California was selected by CAISO through a competitive solicitation to construct, own, and operate the Power Santa Clara Valley Project (also known as the Metcalf – San Jose B HVDC Project). The project addresses reliability needs by strengthening the electrical grid in central San José to improve resiliency, support economic development, and provide better access to cost effective, renewable energy to meet the needs of residents and businesses.

The project includes two new high voltage direct current (HVDC) terminals, with a 500 kV alternating current (AC) gas-insulated switchyard at the Grove terminal and a 115 kV AC gas-insulated switchyard at the Skyline terminal, approximately 13 miles of 320 kV direct current (DC) underground transmission line, and approximately one mile of 500 kV AC underground transmission line. The project interconnects to Pacific Gas & Electric’s (PG&E) existing Metcalf substation on the southern end and to PG&E’s existing San Jose B substation on the northern end.

SWIP-North is the final link of a transmission corridor extending from Idaho to southern Nevada that will increase power reliability in the western U.S. and enable the flow of ~1,100 megawatts of electricity. Phase 1 (ON Line) and Phase 2 (DesertLink) are already in operation. SWIP-North is the final phase with construction planned to begin in 2025 and projected completion in 2027. The project will connect Midpoint Substation near Twin Falls, Idaho, with Robinson Summit Substation near Ely, Nevada. SWIP-North will provide hundreds of construction jobs for skilled workers and millions of dollars in local tax revenues.

When placed into service in 2027, and coupled with the One Nevada Transmission Line (ON Line) which was placed into service in 2014, SWIP-North will improve reliability and reduce congestion for the western grid, provide a new pathway to hedge against grid impacts from extreme weather and wildfire events in the West, foster the development of new renewable generation resources, enable the export of excess solar capacity from the Desert Southwest, and support the achievement of regional electrification and climate goals.

Milestones
In December 2023, Great Basin Transmission, LLC (GBT) was selected by the California Independent System Operator (CAISO) Board of Governors in CAISO’s 2022-2023 Transmission Plan to develop, permit, finance, construct, own, operate and maintain the SWIP-North Project. This selection is subject to certain conditions as further described on CAISO’s website.