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The reservoir was officially impounded in 1972 after construction of Libby Dam, which began in 1966. Treaty personnel are identified below. The Karaj Dam (Amir kabir) The initial studies for Amirkabir Dam took 22 years until 1956 when formal proceedings began and the dam was constructed in the period from 1957 to 1961 by Morrison Knudsen. The reservoir has a volume of 7.16 km3 and provides flood storage, hydroelectric power production, and recreation benefits. Kootenai River Flow: 7,000 Cubic Feet per second, 10-12 foot visibility, 57 degrees. Downstream of Libby Dam, the Kootenai River flows south for about 3.5 miles to the mouth of the Fisher River and then flows northwest through the town of Libby, Montana before entering Idaho. Libby Dam. The Corps issued a ROD for Libby Dam Flood Control and Fish Operations in June 2008. The agency designed the flows to aid the downstream movement of young salmon smolts. Libby Dam outflow is expected to remain at 7 kcfs through August. Updated computations include flow duration curves and pool elevation probability curves. Currently . Columbia Basin Trust. As you may or may not know, Lake Koocanusa is a manmade reservoir that was created 45 years ago (1975) when the Libby Dam was constructed on the Kootenay River in Montana, USA. This reduction was caused by the influence of Libby Dam on the flow regime and on the reduction of sediment in the river below the dam due to its sediment trapping characteristics. Project experience includes water control manuals for numerous Corps’ Districts, including: New Orleans District: Caernarvon Freshwater Diversion Structure . Mica Dam. Treaty Review (US) Treaty Review (Canada) Treaty (BPA) Treaty - Digital Library. Libby Dam, located on the Kootenai River 17 miles upstream from the town of Libby, Montana, rises about 422 feet above bedrock and includes a spillway with two 48-foot-wide bays, three 10- by 17-foot regulating sluices, and a powerhouse for eight 105-megawatt generators. Dam) and flow from Libby Dam (P. McGrane, USACE, pers. Reclamation's ROD for operations at Hungry Horse Dam was issued in August 2009. Figure 14: Libby Dam Inflow Forecast from Water Supply, ESP and the COE Plotted with Observed Runoff. Libby Dam is a concrete gravity dam in the northwestern United States, on the Kootenai River in northwestern Montana. Water behind the Libby dam floods back 42 miles into Canada, while the water released from the dam returns to Canada just upstream of Kootenay Lake. KOOTENAI RIVER AT LEONIA, ID. The dam was constructed as part of a treaty between the United States and Canada to cooperatively develop the water resources of the Columbia River drainage basin. Libby Dam, the fourth and last dam built under the treaty, was completed in 1975 by the U.S. Army Corps of Engineers. Libby is operated for power, flood control, and other benefits at-site and downstream in both Canada and the United States. Flows: present discharge from Libby Dam is 26,500 cfs Water managers at the U.S. Army Corps of Engineers, along with federal, tribal, and state fishery biologists, have determined that water temperature and flow are now sufficient to commence sturgeon flow augmentation operations at Libby Dam, Montana, for endangered Kootenai … Lake levels fluctuate throughout the year and are generally highest in July, August and then decrease slightly throughout the fall. Treaty Review. Today, the river is held in check by Montana's Libby Dam, creating Lake Koocanusa which backs up into British Columbia. The Libby dam reached an all time high water flow in June of 2006 since the dam was built in 1968. The spillways are 48 feet wide and 56 feet high and at full capacity water flows through at 1.2 million gallons per second–eight times greater than Niagara Falls which has a normal flow of 150,000 gallons per second. The model study of the center sluice, Libby Dam… It is the first of the dams that the Kootenay encounters durings its journey and provides further regulation of the water that flows into Kootenay Lake. Rapids and Float Notes. At maximum pool, spillway capacity will be 145,000 cfs and regulating sluice capacity will be 61,000 cfs. Kootenai River Montana Fishing Report 5-24-2015 May 24, 2015. Kootenai River bl Libby Dam nr Libby MT. The level of Kootenay Lake is vital to operating our four hydroelectric dams on the Kootenay River. The reservoir behind the dam, Lake Koocanusa, extends 90 miles upstream into British Columbia, Canada. Water temps have risen to … Figure 15 Libby Dam Inflow Forecast from Water Supply, ESP and the COE. The dam is located on the Kootenai River, 17 miles upstream of Libby, Montana. The sturgeon flow augmentation plan this year is to ramp up Libby Dam discharge over a one week period to 20,000 cubic feet per second, and then hold that flow for about three weeks. All forecasts increased after the rain events around the 6/15 time frame. Currently. • Minimum flows between Kootenai River white sturgeon flows and salmon augmentation flows are shown in Table 1 using traditional flood control at Libby and in Table 2 using VARQ flood control at Libby. Libby and Hungry Horse dams to augment flows in the lower Columbia River. The net result is a more normal spring flow regime that benefits listed species and increases the likelihood of full reservoirs and water supplies for summer flow needs. Libby Dam Outflow Update Sturgeon Flow Releases to Begin by U.S. Army Corps of Engineers June 10, 2009. Contact Us. 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