From the USACE Sacramento District website – The U.S. Army Corps of Engineers, Sacramento District awarded a $4.2 million construction contract August 8 to Odin Construction Solutions, Inc., of Rocklin, California, to raise Dike 8 at Folsom Lake by 3.5 feet. The Dike 8 raise is part of the larger Folsom Dam Raise project, which will raise the height of Dikes 1-8, the Left and Right Wing Dams, and the Mormon Island Auxiliary Dam. The dam raise project also includes modifications to the main spillway and emergency spillway gates and piers to prevent water from overtopping the gates during a large flood event. The Folsom Dam Raise project will reduce the flood risk for 440,000 residents and $58 billion of assets in the greater Sacramento metropolitan area by enabling the Bureau of Reclamation to operate the Folsom Dam and its auxiliary spillway with a greater capability to route large flood events. Groundbreaking for the Dike 8 raise, located about 1.5 miles southeast of the main dam adjacent to E. Natoma Street in Folsom, is expected to take place in fall 2019 with construction to be complete in 2020. Built by the Corps of Engineers in 1956, the multipurpose Folsom Dam is operated by the Bureau of Reclamation primarily for flood control but also provides recreation, water supply and power generation benefits.
From California Water News Daily – Californians are intimately familiar with the Richter scale, the gauge for measuring an earthquake’s magnitude based on its seismic movement. Additionally, an earthquake early warning system is being refined to provide the rapid detection of earthquakes, real-time assessment of the shaking hazard, and, hopefully, the notification of people prior to the shaking. But what about the atmospheric storms…(more)
From the OakdaleLeader & CA Fish & Wildlife – CDFW is seeking a regulatory change from the Commission in order to prevent further spread of this persistent invasive species. In California, nutria pose a significant threat as an agricultural pest, a destroyer of critical wetlands needed by native wildlife, and a public safety risk as their destructive burrowing jeopardizes the state’s water delivery and flood control infrastructure. Nutria cause various kinds of damage through burrowing, intense herbivory, and carrying pathogens and parasites. Nutria do not construct dens, they burrow, frequently causing water-retention or flood control levees to breech, weakening structural foundations, and eroding banks. They can consume up to 25% of their body weight in above- and below-ground vegetation each day, but they waste and destroy up to 10 times as much, causing extensive damage to the native plant community and soil structure, as well as significant losses to nearby agricultural crops. (more). Read more about Nutria: https://www.wildlife.ca.gov/Conservation/Invasives/Species/Nutria