Some Dam – Hydro News
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SSoommee DDaamm –– HHyyddrroo NNeewwss and Other Stuff i 11/07/2008 Quote of Note: “To lodge all power in one party and keep it there is to insure bad government” - - Mark Twain “Good wine is a necessity of life.” - -Thomas Jefferson Ron’s wine pick of the week: Marquis Philips S. Australia Eastern Australia Cabernet, Shiraz, or Sarah’s Blend 2007 DDaammss Conference - FERC Dam Safety Program December 5, 2008, 9:00 a.m. - 1:00 p.m. Location: Washington, DC Technical conference on FERC Dam Safety Program (AD08-11-000) (Washington, DC) (Free webcast is available) Participants will discuss the major components of the FERC Dam Safety Program as well as current state and industry assistance efforts. They will also explore the challenges facing state dam safety offices to identify needed technical and resource assistance. A free live webcast is available for this meeting. Visit our Dam Safety website The conference will be held at: Federal Energy Regulatory Commission Commission Meeting Room 888 First Street, NE Washington, DC 20426 Contact: Natalie Leech @ (202) 502-6396 Erosion could cause western Pa. river dam to fail Associated Press, By DAN NEPHIN 10.28.08, Forbes.com PITTSBURGH, PA - A dam on the Allegheny River is so eroded it could fail if it is hit by a barge or a large ice load, and the U.S. Army Corps of Engineers said it will seek bids to repair the damage. Inspectors found 1 Copy obtained from the National Performance of Dams Program: http://npdp.stanford.edu more erosion than they anticipated on a recent dive at the Allegheny River Lock and Dam No. 6 near Freeport, a concrete structure about 30 miles upriver from Pittsburgh. For now, there is no immediate threat to public safety and the lock is operational, said Corps spokesman Jeff Hawk. Should the dam fail, a 9-foot- deep pool above it that allows commercial and recreational traffic to navigate would dry up, as would some wetlands and the source of drinking water for some communities. The Corps plans to solicit bids for repairs on Nov. 10. Six contractors attended a preconstruction meeting on Tuesday, but the Corps does not have a cost estimate, Hawk said. Work is expected to be finished in January and river traffic should not be affected. The dam's problems show the need for funding to upgrade the region's aging locks and dams, the Corps said. The Monongahela, Allegheny and Ohio rivers make up a sort of water highway upon which millions of tons of coal, chemicals, metals and other cargo are shipped annually. Locks are essentially water-driven elevators that lift and lower boats so they can pass through dams that control water levels. In July, the Corps outlined its infrastructure problems in the region, saying the 100-year-old lock and dam at Elizabeth, south of Pittsburgh, and those at Emsworth northwest of the city are "critically near failure." Several others are not much better, the Corps said. Much of the work has been deferred because of federal budget constraints. (Wow, a new dam!) Wanahoo dam construction underway By Lisa Brichacek. 10/30/2008, Wahoo Newspapers.com WAHOO, NE - With the sound of dirt mover engines purring in the background, supporters of the Lake Wanahoo project gathered Thursday morning for a celebration. "It's a good day for all of us involved," Lower Platte North Natural Resources District Manager John Miyoshi told those assembled for the groundbreaking ceremony at the site just north of Wahoo. Dirt work on the main embankment for the project began on Monday. Thursday's ceremony was a chance for local officials and area residents to celebrate tangible progress on a project that started back in 1990. "It's just unbelievable this project, with all its ups and downs, has finally come about," Wahoo Mayor Daryl Reitmajer said. Saunders County, City of Wahoo and Lower Platte North NRD are the local sponsors for the dam, lake and recreation area that is expected to cost over $24 million. The Wanahoo site consists of about 1,600 acres in a 2 1/2 mile area directly north of Wahoo. Miyoshi pointed out this was truly a cooperative effort. "This is a community project," he said. "It's bigger than any one sponsor could do alone." In fact over the course of the last 10 years, additional sponsors from the state and federal level joined the project as well. Funding for the project is also being supplied by the U.S. Army Corps of Engineers, Nebraska Department of Natural Resources, Nebraska Environmental Trust, Nebraska Department of Roads, Department of Environmental Quality and the Nebraska Game and Parks. Representatives from these entities were also on hand for the groundbreaking ceremony. Following the ceremony, all in attendance had a chance to watch as crews from Commercial Contractors of Lincoln continued to move dirt from area of the site to the footprint of the dam. Construction on the embankment is scheduled to be completed by Aug. 31, 2010. Other activities going on at the Wanahoo site include the construction on a breakwater levee and a sediment trap/wetlands basin. Both of these structures are being contracted by the Corps. The levee will sit about mid-point in the lake. It will help to control wind erosion on the lake as well as provide a path for walking trail. The trap/basin is being constructed at the upper end of the lake and will help filter dirt and other sediment from the Sand Creek watershed before it can get into the lake. Bill Mulligan, Chief Civil Works Manager for the U.S. Army Corps of Engineers - Omaha Division, said the Corps is pleased to be a part of the project. "This is a unique project for us," he said. "We're building not just a project with a dam, it's an ecosystem." Mass. sues over safety of 2 Taunton dams Associated Press - October 31, 2008 BOSTON (AP) - Concerns over the structural integrity of 2 Taunton dams has sparked a lawsuit from Attorney General Martha Coakley's office, who said the dams' owner has failed to comply with various safety orders. The complaint, filed in Suffolk Superior Court Thursday, seeks an injunction requiring the owner of the Morey's Bridge Dam and a temporary dam to fix the problems and to pay civil penalties. The two adjacent dams hold back the waters of Lake Sabbatia. Jefferson Development, the registered owner of the Morey's Bridge Dam, and the company's principal, David L. Murphy, of Chestnut Hill, are named in the lawsuit. Messages left at Jefferson Development and for Murphy were not immediately returned Friday. 2 Copy obtained from the National Performance of Dams Program: http://npdp.stanford.edu Dworshak Dam in N. Idaho a little leaky, but safe By ERIC BARKER | Lewiston Tribune • Published November 01, 2008 OROFINO, Idaho – It's made up of 6.5 million cubic yards of concrete, weighs more than 26 billion pounds and holds back more than 1 trillion gallons of water. At 30 years old it leaks a little bit and has been declared "unsafe or potentially unsafe." That might sound frightening but officials at the U.S. Army Corps of Engineers say there is little to worry about - Dworshak Dam is solid and not in danger of failing. "It's as safe now as when it was built," said Dworshak Operations Manager Greg Parker. Then why the rating with such alarming language? Because Dworshak is so large and holds back so much water, a failure would wreak massive damage to life and property in downstream communities like Orofino, Lewiston and beyond. And while the chances of Dworshak failing are deemed low, the consequences are massive. So when corps officials completed a risk assessment of the dam last February, they rated Dworshak a 2 on a scale of 1 to 5, with 5 being the safest. "If the economic consequences are there, it's going to be rated a 2," Parker said. The safety assessment of Dworshak was conducted by a corps team from outside of its Walla Walla district. Members of the team did not visit the dam. Instead they looked at reams of data produced by local engineers. "It's an outside set of eyes," said Bob Hollenbeck, chief of structural design for the Walla Walla district. He said members of the team did debate rating Dworshak a 1 on the 1-to-5 scale. Such a rating would have meant the dam would not be able to operate at full pool. In the end, Hollenbeck said a rating of 2 was arrived at because the uplift pressures beneath the dam were not out of line with design criteria. "I believe it's a very appropriate rating," he said. "We need to be cognizant of everything that is downstream of us." But since the rating was made public earlier this year, the corps has fielded numerous calls from concerned citizens. Joe Saxon, a spokesman for the corps' Walla Walla district, said the agency is aware of the concerns and is trying to be as transparent as possible. "If folks are concerned we'd like to know about it because we'd like to address those concerns," Saxon said. "If we need to talk to service clubs or through the media, we need to do that. We want to be up front as we can to assure the people of the safety here at Dworshak." The dam that blocks the North Fork of the Clearwater River near its mouth does have some issues. Water is squeezing through flex joints, known as water stops, on the front of the dam and even though that leakage doesn't immediately threaten the dam, it needs to be fixed.