Research clarifies hazards posed by harmful algal blooms tv6.news - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from tv6.news Daily Mail and Mail on Sunday newspapers.
OSU research details hazards posed by harmful algae blooms ktvz.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ktvz.com Daily Mail and Mail on Sunday newspapers.
View Comments The U.S. Army Corps of Engineers is being forced to make immediate and extensive changes to the way it operates the 13 dams in the Willamette Valley, including Detroit Dam, to give native species of fish a chance to survive. Under an order from federal District Court Judge Marco Hernandez issued July 16, the Corps will be forced to take actions such as improving fish passage and water quality, deep drawdowns of water to allow juvenile fish to pass downstream, spilling water at different times of year, and releasing adult fish above the dams. Hernandez s order laid out broad actions; a later final judgment will contain specifics.
and is republished here as part of a collaboration, Tapped Out: Power, justice and water in the West, in which eight Institute for Nonprofit News newsrooms California Health Report and High Country News; SJV Water and the Center for Collaborative Investigative Journalism; Circle of Blue; Columbia Insight; Ensia; and New Mexico In Depth spent more than three months reporting on water issues in the Western U.S. The result documents serious concerns including contamination, excessive groundwater pumping and environmental inequity. It was made possible by a grant from The Water Desk, with support from Ensia and INN’s Amplify News Project.
Algae blooms in Clear Lake are a public health risk and increase water treatment costs. Image credit: Brett Walton/Circle of Blue May 4, 2021 On a good day, usually in late winter and early spring, the magnificent waters of Clear Lake seem to live up to their name. Under the shadow of the volcano Mount Konocti, the oldest lake in North America and second largest in California sparkles in an array of blues while fishing boats ply the shallow nearshore, their anglers hoping to hook a trophy bass. From his office two miles inland, Frank Costner knows that the lake’s waters also shelter a treacherous occupant – potentially toxic blooms of cyanobacteria. As general manager of Konocti County Water District, Costner is responsible for supplying drinking water from Clear Lake to 4,500 people who live in this region a two-hour drive north of San Francisco.
Mar 16, 2021 Portland District, U.S. Army Corps of Engineers considers a plan to reduce Detroit Reservoir s maximum pool elevation by five feet beginning this summer to reduce the likelihood of overstressing the spillway gates during a large earthquake, which might impact boat ramp access in some years. Portland District invites members of the public to join a virtual informational briefing via WebEx Monday, March 22, 2021 from 5-7 p.m. on a plan to restrict Detroit Dam s maximum pool elevation to 1558.5 feet (from 1563.5 feet) in order to reduce the life-safety risk associated with large seismic events. In 2020, the District completed a seismic hazard analysis for Detroit Dam. The hazard study found the risk to be higher than Corps officials previously thought. Structural analysis has shown a possibility of the spillway gates buckling under the force of a full reservoir during a large earthquake. Even though the probability of breach is low, the Corps wants to take immediate action to reduce risk to acceptable levels because the potential impacts of a breach of the spillway gates are high with Detroit Dam located upstream of many communities including the state capital of Salem. The reservoir spans the Linn County-Marion County border in the Oregon Cascades on the North Santiam River near the city of Detroit.
Corps of Engineers may trim Detroit Reservoir maximum level, to ease quake threat ktvz.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ktvz.com Daily Mail and Mail on Sunday newspapers.
Plan To Lower Detroit Reservoir By 5 Feet | 106.7 The Eagle iheart.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from iheart.com Daily Mail and Mail on Sunday newspapers.
Concern about a giant earthquake breaching Detroit Dam has prompted the U.S. Army Corps of Engineers to lower summertime water levels in Detroit Reservoir beginning this spring, the federal agency told the Statesman Journal. The likelihood of such an earthquake is slight maybe 1 in 10,000 but the potential calamity means a reservoir adjustment is needed, and that is likely to impact recreation in an area still reeling from historic wildfires. “The chances of a breach right now is very, very low. Around 0.01 percent,” said Ross Hiner, dam safety program manager for the Corps, who said the Detroit decision followed a recently-completed safety assessment. “But we want to move it even lower.”