Four California dams are now being dismantled, reports the Arizona Republic:
Sometime in January, work crews will start drilling a tunnel at the base of a concrete dam on the Klamath River, near the California-Oregon border. The tunnel will begin the process of drawing down the reservoir behind the dam, known as Copco-1, and prepare the site to remove the dam fro the river. Time was, removing a dam in the West was unheard of. Dams were built to store water, generate electricity, manage the use of rivers for growers. But environmental activists started telling the story of how dams damage a river and its ecosystem, and Indigenous communities have told their stories of how dams took away traditional resources and food sources. And so, in recent years, we’ve seen more dams removed. In Arizona, the removal of a hydroelectric dam on Fossil Creek led to the restoration of a sparkling waterway and a habitat for fish, birds and other wildlife.

California’s dam-removal project began in June, reports the Los Angeles Time, when the smallest of the four dams was torn down by crews using heavy machinery. “The other three dams are set to be dismantled next year, starting with a drawdown of the reservoirs in January.”

“The scale of this is enormous,” said Mark Bransom, CEO of the nonprofit Klamath River Renewal Corp., which is overseeing dam removal and river restoration efforts. “This is the largest dam removal project ever undertaken in the United States, and perhaps even the world.” The $450-million budget includes about $200 million from ratepayers of PacifiCorp, who have been paying a surcharge for the project. The Portland-based utility — part of billionaire Warren Buffett’s conglomerate Berkshire Hathaway — agreed to remove the aging dams after determining it would be less expensive than trying to bring them up to current environmental standards.

The dams were used purely for power generation, not to store water for cities or farms. “The reason that these dams are coming down is that they’ve reached the end of their useful life,” Bransom said. “The power generated from these dams is really a trivial amount of power, something on the order of 2% of the electric utility that previously owned the dams.” An additional $250 million came through Proposition 1, a bond measure passed by California voters in 2014 that included money for removing barriers blocking fish on rivers.

Crews hired by the contractor Kiewet Corp. have been working on roads and bridges to prepare for the army of excavators and dump trucks. “We have thousands of tons of concrete and steel that make up these dams that we have to remove,” Bransom said. “We’ll probably end up with 400 to 500 workers at the peak of the work…”

In addition to tearing down the dams, the project involves restoring about 2,200 acres of reservoir bottom to a natural state.