California’s “once-in-a-generation” reservoir plan runs into a costly complication

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California is pushing its most significant new reservoir in decades

I’ve covered plenty of water projects, but Sites Reservoir is being framed as a once-in-a-generation bet on storage. The plan would create a 13-mile-long reservoir in rural Colusa and Glenn counties, about 70 miles northwest of Sacramento.

It would pipe water in from the Sacramento River rather than sit on a major waterway, and it’s positioned as California’s largest new reservoir in nearly 50 years.

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The price tag is rising, and the timeline is tight

The total cost of Sites is now estimated at roughly $6.2 billion to $6.8 billion, and the project team wants to break ground this year or early next year.

The main construction contract alone is valued at around $3 billion and includes design assistance, construction of two large and several smaller dams, roads, and bridges. Officials are targeting completion by 2033, leaving little room for surprises.

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Choosing a contractor is becoming complicated

Just as the project inches toward construction, a labor dispute is landing at the worst possible time. Montana-based Barnard Construction is expected to be selected as the main contractor following a competitive process that included three finalists…

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