The first fall storm of 2017 is expected to dump up to 2 1/2 feet of snow across the Sierra region over the weekend. The National Weather Service in Sacramento is predicting 24 to 30 inches of snow in Lassen Park and 12 to 18 inches in Donner, Carson, Ebbets, Tioga and Sonora passes. Several inches are also expected in the Shasta National Forest.
Last week I attended a town hall meeting in Fresno where the topic was new dams and, more importantly, water in general. The five-member panel included two California assemblymen and one state senator, all from the San Joaquin Valley. The politicians were all on their game with answers and non-answers depending upon the questions.
A recent study by NASA and several partners has estimated, for the first time, the global impact of atmospheric rivers on floods and droughts, as well as the number of people affected by these atmospheric phenomena. Atmospheric rivers are relatively long, narrow, short-lived jets of air that transport water vapor across significant portions of Earth’s mid-latitude oceans, onto the continents and into Earth’s polar regions.
The California Department of Water Resources announced Wednesday it has completed the first phase of its massive reconstruction of Oroville Dam’s shattered main spillway — just in time for the first significant rainfall of the season. The agency also announced that in the wake of the spillway’s failure last February — and several reports that found the concrete chute appeared to have been poorly designed, built and maintained — it will conduct a “comprehensive needs assessment” for the dam and its reservoir.
California’s five-year drought taxed the state’s water supplies like never before, especially its groundwater. Many areas of the state saw huge drops in aquifer water levels, with resulting surface subsidence and even damage to infrastructure such as roads and canals. As a result, water agencies and scientists began looking for ways to monitor groundwater more closely. One that emerged uses sensors mounted on Earth-orbiting satellites.
Additionally, the San Francisco Public Utilities Commission said it has earmarked some $700 million to invest in expanding sewer infrastructure over the next 15 years. Ahead of rain expected this weekend, various department heads gathered at Chan Kajaal Park, located near one of The City’s most flood-prone intersections at 17th and Folsom streets, to announce a new strategy that focuses on working with residents and business owners around flood prevention.
The Oroville Dam flood control spillway has been fixed. Eight and a half months after the gravest emergency in the dam’s history forced 188,000 residents to flee, state officials said Wednesday that Oroville’s structures have been largely rebuilt and can withstand a rainy Northern California winter. A second phase of work will be completed next year. “Lake Oroville’s main spillway is indeed ready to safely handle winter flows if needed,” said Grant Davis, director of the Department of Water Resources, in a conference call with reporters.
California is launching an overall safety review of the nation’s tallest dam to pinpoint any needed upgrades in the half-century-old structure, water officials said Wednesday, launching the kind of overarching review called for by an independent national panel of experts in September following the collapse of two spillways at Oroville Dam. Experts from the national Association of State Dam Safety Officials and the U.S. Society on Dams concluded that state officials would have been able to catch the problems that led to the collapses if they had reviewed the 1960s’ design and construction of the dam using modern engineering standards.
After a massive construction effort, the main flood control spillway at Oroville Dam is up and running in time for the rainy season and on point for its Nov. 1 target for repair, officials with the California Department of Water Resources announced today. DWR set Nov. 1 as its goal for repairing and reconstructing more than 2,270 feet of the 3,000-foot-long main, gated flood control spillway at Lake Oroville so it could handle flows of 100,000 cubic-feet per second this winter.
The State Water Resources Control Board today released its draft proposed regulation to implement permanent prohibitions against certain wasteful water use practices, as directed by Gov. Jerry Brown under executive orders B-37-16 and B-40-17. According to the State Water Board, the agency is conducting the rulemaking process under its “Waste and Unreasonable Use” authority as part of the Administration’s framework to make conservation a “California Way of Life.”
