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9/5/2014 Some Dam – Hydro News TM And Other Stuff i Quote of Note: “Defeat is not the worst of failures. Not to have tried is the true failure." -- George Woodberry Some Dam - Hydro News Newsletter Archive for Back Issues and Search http://npdp.stanford.edu/ Click on Link (Some Dam - Hydro News) Bottom Right - Under Perspectives “Good wine is a necessity of life.” - -Thomas Jefferson Ron’s wine pick of the week: 2009 Northstar Merlot "Columbia Valley" “ No nation was ever drunk when wine was cheap. ” - - Thomas Jefferson Dams: (Getting ahead of the potential failure.) DEC works to stop potential dam breach By Anna Norris, August 22, 2014, wbng.com (WBNG Binghamton) After reports of a possible dam breach in Tioga County, The New York State Department of Environmental Conservation started working on a three-step plan to stop it. On August 21, the Emerald Lake Dam was potentially endangering residents in the Richford and Berkshire areas, according to a news release sent by Tioga County emergency communications. Engineers examined the dam and proposed a three-phase plan to stop the structural deficiency of the dam, according to the release. Phase 1 has been completed and the water has been reduced to a safe level, Tioga County. (Put up or remove! It always comes down to the money!) New option emerges for Estabrook Dam problems By Lee Bergquist of the Journal Sentinel , Aug. 24, 2014, jsonline.com 1 Copy obtained from the National Performance of Dams Program: http://npdp.stanford.edu Milwaukee County officials are weighing a new option to address the aging Estabrook Dam, which has deteriorated to the point where the state has ordered that the Depression- era structure be repaired or torn down. Officials are now considering constructing a structure of boulders and large rocks that they say could satisfy concerns of two competing constituencies: ■ It would be engineered to allow fish to have the run of the river by letting them swim over the top. Environmentalists and angling groups are pushing for fish passage at Estabrook and would like to see the dam removed altogether to complement improvements in the river after removal of the North Ave. dam in 1997 and construction of a fish passage system at Thiensville in 2010. ■ It would also hold back water so motor boats could move over the river from near Hampton Ave. to north of Lincoln Park. Motorized boats have not been used on this section of the river since 2008. In 2009, the Department of Natural Resources ordered the county to overhaul the dam, or tear it down after identifying numerous safety problems dating back to 1995. The state's deadline for repairs is Dec. 31, which the county will not meet. But DNR officials say they are willing to give the county more time because they are making progress. In its order, the DNR also required the county to keep the dam gates open, allowing water to pass through it, to relieve stress on the structure until problems were addressed. With the gates open, water levels have dropped sharply. Many residents who live upstream have said they want to keep the dam, which was built by the Civilian Conservation Corps. When operating, it creates a pool of some 100 acres as deep as 9 feet. A federally mandated environmental assessment of the project, which was made available to the Journal Sentinel on Friday, concluded that refurbishing the dam would cost the most. Constructing a so-called rock ramp would cost less than repairing the dam. The cheapest alternative would be to tear it down. The cost of rebuilding the dam is estimated at $2.5 million, according to the analysis done by AECOM, an engineering design company. Constructing the rock ramp would cost $2.4 million. Tearing down the dam would cost $1.7 million. When annual maintenance costs are figured in over 20 years, the price tag of reconstructing and operating the dam rises to $5.1 million and the cost of the rock ramp would be $3.3 million, according to analysis. The County Board of Supervisors will be asked to decide which option is best. Supervisors have gone on record as supporting repair of the dam and previously voted to spend $2.1 million to fix it. However, before work could begin, officials learned the federal Bureau of Land Management would require the county to conduct an environmental assessment and evaluate other alternatives. The federal bureau has custody of an island separating two sections of the dam, and by federal law, any work would first require a review under the National Environmental Policy Act, said Kevin Haley, a landscape architect with Milwaukee County Parks who is helping oversee the project. As part of that analysis, a technical team that includes experts from the county, the DNR, an engineering consultant and the Southeastern Wisconsin Regional Planning Commission evaluated strategically piling rocks to keep the river flowing while also creating a lake-like pool that would stretch nearly a mile north of W. Silver Spring Drive. Parks officials see promise in piling rock 6 feet high that would cover a section of the dam on the east side of the river. A rehabilitated spillway would continue to hold back water on the west side of the river, located south of Hampton Ave. It seems like a positive solution — a compromise," said Haley, who said the Parks Department has been briefing supervisors on developments for several months. "You will have one big curtain of water." One advantage of the rock structure is that the pool created by it would be open year around. With the dam, the DNR would require dam gates opened, lowering water levels in all but the summer months, Haley said. "I don't think people have quite grasped that yet," he said. If the dam is rebuilt, county officials would add a fish passage because of a grant from the U.S. Fish and 2 Copy obtained from the National Performance of Dams Program: http://npdp.stanford.edu Wildlife Service, Haley said. The county has scheduled a public meeting to discuss the project from 6 to 8 p.m. Sept. 3 at Nicolet High School in Glendale. Haley said the board's Parks, Energy and Environment Committee is tentatively planning to review the assessment on Sept. 9, with the full board voting Sept. 18. Calls and emails on Friday to Gerry Broderick, chairman of the parks committee, and Theodore Lipscomb, a supervisor whose district includes residents affected by the dam, were not returned. Two groups with differing views have been tracking the project for years. The Milwaukee River Preservation Association has favored maintaining the dam while Milwaukee Riverkeeper has pushed for tearing down the dam. Glen Goebel of the Milwaukee River Preservation Association said his group hadn't yet digested the entire report, but he raised concerns about the long-term integrity of a rock structure. While hydrology analysis has shown that the river's pool would be about a foot shallower than a dam, Goebel disagreed. "The only thing that will ply that river is canoes and kayaks," he said. Cheryl Nenn of Riverkeeper said she had not seen the report. She was willing to consider the rock structure, but said, "we still think that removal is the best way to go. “Removing the dam is the cheapest alternative and best for the environment, she said. She questioned whether the county would fund upkeep of a dam or rock ramp in future years. (No vegetation, more runoff and flooding) After Wildfires, Dams Fail In North Central Washington By Anna King, boisestatepublicradio.org, 8/25/14 The State of Washington and residents in Okanogan County are concerned that more small dams could be at risk of failing after three of them burst in a thunderstorm event last week near Twisp in northcentral Washington. The tallest dam that went last week was 35 feet high. The longest was 400 feet across. These small public and private reservoirs are mainly for irrigation water for the lush canyon farms below. Last Thursday’s storm dropped only a couple of inches of rain in that area. But the amount of water running down barren hillsides and funneling into several canyons dwarfed the water let go from the failed dams. State dam experts have been pulling long hours to shore up two, much-larger remaining dams near the ones that failed. And there could be more problems to come. In wildfire-struck Okanogan County 45 small dams hold back more than 3 million gallons of water. If they were to fail in another storm it could threaten lives, farms -- and the irrigation systems they depend on. (Oh well! It’s amazing what a little flower can do!) Reservoir would destroy habitat of 2 rare plants Two species thought to exist only in Lone Mesa State Park By Jim Mimiaga Journal staff writer, August 25, 2014 5:52pm Lone Mesa snakeweed (Gutierrezia elegans), a globally rare plant discovered by local naturalist Al Schneider, is being threatened by a proposed reservoir north of McPhee Reservoir. (Oh oh, we want a dam!) War(n)ing: Local engineer weighs in on Hope Mills dam fayobserver.com, August 27, 2014 3 Copy obtained from the National Performance of Dams Program: http://npdp.stanford.edu No one would like to see the return of Hope Mills Lake, NC any more than Wilbur Dees. Dees, whose mother and father both worked in the mill, grew up in a small wood-frame house in what is now Hope Mills Lake Park. "We rented that house for 25 cents a month," Dees said.