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In California, A Move To Ease The Pressures On Aging Dams

Until a few weeks ago, the McCormack-Williamson Tract in the California Delta was an island of low-lying farmland, more than two square miles protected from the surrounding rivers and sloughs by earthen levees. Today the tract is an immense lake, up to 15 feet deep, with fish prowling the water and ducks skimming the surface. The adjacent Mokelumne River, swollen by the intense storms that have drenched the state this winter, caused a levee to break, allowing the water to rush in.

Sinking Land Crushes California Groundwater Storage Capacity

Unbridled pumping of aquifers in California’s San Joaquin Valley is severely reducing the land’s capacity to hold water, according to a Stanford University study. The loss of storage is due to subsidence, which is the compaction of soils as a result of removing too much water. The study, which provides the first estimate of the permanent loss of groundwater storage space that occurred during a drought from 2007 to 2010, also shows that California lost natural water storage capacity equal to a medium-sized reservoir.

Recent California Floods Could Trigger Earthquakes, New Report Says

As if we don’t have enough trouble from flooding, extreme amounts of rain caused by back-to-back storms systems in the state could create enough pressure in the groundwater system to trigger earthquakes along California’s faults, a new report says. California has received record amounts of rain this winter, causing everything from dam failures to widespread flooding and mudslides.

OPINON: How Does California Move Forward After Historic Storm Season?

This winter’s record-breaking storms have proven a fierce test of our state and its infrastructure. It has has been particularly frightening for people in and around the city of Oroville. We’d first like to say how glad we are that hundreds of thousands of people were able to safely evacuate and the emergency spillway helped provide the necessary time to do so. And we share their relief at being able to return to their homes. Now that the immediate danger is passed, we can take a more thoughtful look at what happened.

OPINION: After California Floods, Infrastructure Is Suddenly Sexy

There is a cycle to the conversation about infrastructure and how to pay for it. And it goes like this in California: A few politicians say that infrastructure – roads, bridges, tunnels, railways, dams and more – are the lifeblood of economic prosperity. Editorial boards point out that Gov. Pat Brown and the Legislature of his era helped make California an economic power by investing in the massive California State Water Project and highways, and by making the University of California system the best in the world.

Water Bond Money To Go To Fixing Deteriorating Infrastructure Across The State

In 2014, California voters approved a $7.5 billion bond that would go to several water projects. So far, only 2 percent of the money has been used, and the rest has been sitting in a fund, untapped. In light of the Oroville Dam scare in early February, lawmakers are looking to focus their attention on flood management projects, such as fixing old dams and maybe building new ones. However, some are hoping lawmakers will look over the lowest-priority projects and instead focus on water storage with all the recent precipitation.

BLOG: Lessons Learned From Floods And Misguided Priorities

The impacts of California’s catastrophic floods will not end when the water subsides. Even as drought conditions disappear it’s a safe bet that the politics of water won’t wane. The pictures are out there to be seen on the web. Flooded farmland as far as the eye can see; homes and businesses under water; and, the damage done to the spillway and hillside at Oroville Dam are amazing but predictable.

Giant Chasm Revealed As Water Stops Flowing At Oroville Dam

Water stopped cascading down Oroville Dam’s fractured main spillway Monday, revealing a gaping wound from a beating that lasted nearly three weeks. Dam operators gradually scaled back water releases to zero over a six-hour period, providing breathing room for construction crews trying to clear debris from a badly choked Feather River channel and restart the dam’s critically needed hydroelectric plant. The shutdown is expected to last about a week, which the state Department of Water Resources hopes will be enough time to bring the plant back into operation.

OPINION: Faced With Crisis, California Water Managers Stepped Up

Operators of Oroville Dam – the nation’s highest – shut down its main spillway Monday so that debris could be cleared and the dam’s hydroelectric turbines could be restarted. It was merely the latest of many operational adjustments state and federal officials have made this year to cope with an unprecedented series of rain and snow storms that swept through the state, putting maximum pressure on its complex system of dams, reservoirs, river channels, canals, bypasses, weirs and other man-made water-control devices. By necessity, they operated on the fly as conditions changed, often suddenly, with Oroville being the centerpiece.

P.S. (Pumped Storage), I Love You

Some technologies just seem to make sense. But everything has to line up correctly for a technology to move forward. When I was in Switzerland five or six years ago, the Swiss were considering putting in pumped storage so that low-cost wind from the north and low-cost solar from the south could be stored and then delivered to the rest of the continent at peak times. In 2016, the 1000-MW Linthal pumped storage hydro power plant was successfully synchronized to the Swiss grid bringing this vision to pass.