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determine whether zebra mussels have reached those depths, 130 feet below the surface. If left unchecked, the mussels can colonize and plug up the raw water intakes. . Davis said that when the second intake was built a few years ago, it was equipped with a feed system to inject potassium permanganate in anticipation of chemical treatment being needed to kill zebra mussel colonies. The first intake, built more than 30 years ago, is not equipped with a chemical feed, one could be built if needed. Davis doesn't anticipate any effect on water deliver Up to an inch long, zebra mussels have caused billions of dollars in damage in the Great Lakes region and elsewhere in the Midwest and eastern United States by clogging intake pipes for water supplies and ruining boat engines. They were found in Lake St. Clair near Detroit in 1988 after being transported to the region in the ballast of a ship. Bureau of Reclamation spokesman Bob Walsh said the agency staff in Boulder City will monitor intake structures at Hoover Dam to check for zebra mussels that could impact water conduits and hydroelectric power systems. The announcement by the National Park Service sent ripples of concern through water supply and wildlife agencies on the West Coast, where officials fear wide-ranging economic and ecological impacts. California officials are working on a state response to the situation should the infestation spread downstream on the Colorado River system. They are bracing for the possibility that boats from Lake Mead will carry or have carried zebra mussels to other California waterways. . Reclamation To Resume Double Peak Flows from Flaming Gorge Dam: On Dee 15, Reclamation announced that it will soon resume a double peak flow regime from Flaming Gorge Dam to better accommodate regional hydroelectric generation patterns and demand. Beginning on Monday, December 18,2006, and continuing through February 2007, Reclamation will resume double peak releases from the dam with morning and evening peaks from the dam reaching approximately 1900 cubic-feet-second (cfs). Double peak flow regimes occur when water releases from the dam are increased twice daily to meet hydroelectric power demands. Rick Gold, Regional Director of Reclamation's Upper Colorado Region, said that double peak flows have been a normal mode of operation at Flaming Gorge Dam over the course of its 40-year history. Over the past 11 years, through a combination of operational considerations and dry hydrologic conditions, double peak flows have not been scheduled at the facility." In late 2005, the Western Area Power Association (Western) requested that Reclamation consider a proposal for operations at Flaming Gorge Dam to resume a "double peak" regime to better match the load pattern of federal power customers and reduce the spot market purchases the federal power marketer must make to meet their customer's load demands. Western has estimated the cost savings ofa "double peak" regime versus a "single peak" regime to be approximately $8500 per day over a three month winter season (December through February). Releases from the dam will accommodate two peaks each day in the morning and evening reaching approximately 1900 cfs. Under a single peak operation, the peak flows reach about 1600 cfs during daylight hours. Under the double peak operation, the morning peak, beginning at 7:00 a.m., MST, will have duration of three hours and the evening peak, beginning at 5:00 p.m., MST, will have duration of four hours. Between the morning and evening peaks, releases will be reduced to about 900 cfs. . Releases are scheduled to be 800 cfs during the late evening and early morning hours. The ascending and descending ramp rates for both peaks are 800 cfslhour. These ramp rates have been agreed to by the parties of the Flaming Gorge Working Group to provide a level of safety and also to maintain habitat in the river corridor below the dam. 33