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Port of Entry: Harbor District begins environmental review for project to turn Humboldt Bay into a wind farm manufacturing hub
By Elaine Weinreb - North Coast Journal, July 27, 2023
This graphic shows various types of offshore wind farms. The deep-water variety on the left will be what's used off Humboldt County's shoreline, where the waters reach approximately 2,500 feet deep. Image courtesy of Shutterstock
Big changes are afoot on the Samoa Peninsula. The Humboldt Bay Harbor, Recreation and Conservation District is planning to construct a large manufacturing center to craft and assemble giant wind turbines suitable for the deep offshore waters of the Pacific Coast.
Officially known as the Humboldt Bay Offshore Wind Heavy Lift Multipurpose Marine Terminal Project, the port development is a crucial step to bring plans to build a first-of-its kind wind farm off the Pacific Coast to fruition. It would also position Humboldt's as the only port on the West Coast built to manufacture and repair the turbines — a potential economic boon for the area as the industry enters a period of unprecedented growth.
In an effort to address the climate crisis, the Biden administration issued an executive order about a year ago requiring 30 gigawatts of energy to be produced by offshore winds by 2030. That's enough to power approximately 15 million homes, or just about all the housing units in California.
"The government has said, 'Within the next seven years, we're going to deploy 60 coal-fired power plants' worth of wind,'" Harbor District Development Director Rob Holmlund said at a recent public meeting initiating the environmental review process for the port project. "That is a really ambitious goal ... it's nearly double what the world currently has."
To achieve this, the federal government has leased out numerous areas on both the Atlantic and Pacific coasts in locations where the wind is the strongest.
While wind turbines are already common off the Atlantic Coast, where the ocean water is relatively shallow, the Pacific Coast poses unique challenges. Because the continental shelf drops steeply off only a few miles from the shoreline, wind farms off the Pacific Coast require a different design. While the East Coast's shallow waters allow for turbines to be built directly up from the sea floor, wind farms on the Pacific Ocean must float atop the water on barges tethered to the ocean's floor. It's a relatively new technology only being used at a handful of wind farms in the world on a small scale, and even those are different from what's being proposed off Humboldt's shore. (For example, the world's deepest offshore wind farm is currently in Norway at a depth of 721 feet, according to CalMatters, while Humboldt's farm would be located in waters approximately 2,500 feet deep.)
Pacific Coast wind turbines must be incredibly large. The platforms that will support the turbines alone are each the size of the Arcata Plaza, comprised of three separate pontoons. Atop each platform will stand a 500-foot tower, the top of which will be attached to three 500-foot rotating blades. The entire length of the completed turbine extends about 1,100 feet straight up from the surface of the water. (For reference, the smokestack at the old pulp mill on the Samoa Peninsula stands about 300 feet tall.)
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