Grid · Analysis

The wires that carry the desert into LA

LADWP rebuilt and expanded the Barren Ridge corridor so Tehachapi wind and Mojave solar can physically reach the basin. The wires, not the panels, are the slow part.

BY THE RENEWABLE ENERGY LA EDITORS · FILED OCTOBER 20, 2026 · 6 MIN READ ·

Why the wires are the slow part

Barren Ridge Switching Station sits out past the Antelope Valley, where wind from the Tehachapi passes and solar from the western Mojave can be gathered onto the grid. The project rebuilt an older line and added capacity along the corridor running south toward the basin, at roughly 230 kilovolts per LADWP's project documents, ending near a switching station at Haskell Canyon in the hills above Santa Clarita. In plain terms, it widened the funnel that desert power pours through on its way to the city.

Without that funnel, a turbine in Tehachapi or a solar array in the Mojave can generate all it likes and still not reach a meter in the basin. The electricity has nowhere to go. That is why this desk keeps saying the wires, not the panels, are the part worth watching: the generation can be built in a year or two, while a major transmission line can take the better part of a decade to route, permit, and energize.

The honest math of a bottleneck

A solar farm is a field of panels on relatively flat desert land, and it can go from approval to operation in a couple of years. A transmission line crosses mountains, national forest, private parcels, and federal desert, and every mile of it invites review. The Barren Ridge corridor, on the order of 75 miles at last public report, had to thread the Angeles National Forest, which pulled in federal reviewers on top of the utility's own work.

Transmission is also lumpy in a way generation is not. You cannot build a quarter of a line and carry a quarter of the power in a useful way, so the whole corridor has to be financed and finished before much of the desert generation behind it becomes fully usable. The dollars are recovered in rates over decades, which is why a single line rarely shows up as a visible change on your bill even when it opens access to a lot of clean power.

Who has to say yes

LADWP owns and operates the line, which matters because LADWP is a city department, not a company regulated by the California Public Utilities Commission. Its decisions run through the Board of Water and Power Commissioners and, for big spending, the City Council. The desert and mountain segments also crossed land managed by the U.S. Forest Service and the Bureau of Land Management, so federal right-of-way approvals were part of the path.

Add the California Energy Commission, which tracks the state's transmission needs and renewable goals, and you have the short list of players who shape whether a corridor like this gets built. None of them move quickly. Each has its own review, its own comment windows, and its own reasons to say wait, which is the real answer to why desert power took so long to reach the basin at scale.

Worth watching this month

1. LADWP's Board of Water and Power Commissioners posts meeting agendas publicly, so watch for any transmission or Northern Transmission area items, most of which are routine rather than major.

2. LADWP periodically updates its long-term resource and transmission planning documents, where new desert import needs would show up first, though these move on a multi-year cycle.

3. The California Energy Commission publishes transmission and renewable-integration assessments, worth a check for any mention of Tehachapi or Mojave export limits.

4. Federal right-of-way notices from the U.S. Forest Service or Bureau of Land Management can signal line maintenance or new corridor studies in the Angeles National Forest and the western Mojave, usually routine but occasionally meaningful.

Where this dispatch reads

LADWP, Barren Ridge Renewable Transmission Project (utility), www.ladwp.com, The city utility's own pages describe the corridor, the switching stations, and why the line was built to import desert wind and solar.
California Energy Commission (state agency, .gov), www.energy.ca.gov, The state's energy agency, with transmission and renewable-integration planning that explains how desert generation reaches load centers like LA.
U.S. Forest Service, Angeles National Forest (federal, .gov), www.fs.usda.gov/angeles, Federal land-management pages covering the right-of-way and environmental review for lines that cross the forest.
NREL, Los Angeles 100% Renewable Energy Study (federal lab, .gov), www.nrel.gov/analysis/los-angeles-100-percent-renewable-study.html, A well-known federal study of how LA could reach very high renewable levels, including the transmission the city would need.
U.S. Energy Information Administration, California (federal, .gov), www.eia.gov/state/?sid=CA, Independent federal data on California electricity generation, including the state's wind and solar shares.

Questions readers have asked

Is Barren Ridge a new project or a finished one?

The rebuilt and expanded line was energized in the mid-2010s, per LADWP's own project record. It is in service today, not under construction, so the interest now is in how much desert power it carries and what gets built behind it.

Does this bring in California ISO power?

LADWP runs its own balancing authority, which is separate from the California ISO that covers much of the rest of the state. The Tehachapi wind and Mojave solar reaching the basin on this corridor are largely contracted to LADWP rather than traded through the ISO.

Why not just build more panels closer to the city?

The basin has limited open land and a lot of rooftops, so rooftop solar does real work but cannot cover the whole load. Utility-scale wind and solar live in the desert, and that power still needs long wires to get here.

Will this line lower my electric bill?

Not in any obvious way. Transmission costs are recovered in rates over decades, so the payoff is access to cheaper desert generation and progress toward clean-energy targets, not a line item that drops on your statement.