The reservoir was officially impounded in 1972 after construction of Libby Dam, which began in 1966. flows from Libby Dam (measured at USGS gauge on the Kootenai River below Libby Dam): • Year-round instantaneous minimum flow of 4,000 cfs (already in the proposed action). A stilling basin below the spillways and sluiceways helps slow the water’s velocity to prevent downstream erosion. Kootenai River Montana Fishing Report 5-24-2015 May 24, 2015. Currently. Updated computations include flow duration curves and pool elevation probability curves. Today, the river is held in check by Montana's Libby Dam, creating Lake Koocanusa which backs up into British Columbia. 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. Figure 14: Libby Dam Inflow Forecast from Water Supply, ESP and the COE Plotted with Observed Runoff. Treaty Review. 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. Sometimes being under water is a good thing, especially for Columbia River salmon nests, called redds. Water Temp: 41.72 ° F; Flow: 5620 ft³/s; Water Level: 11.02 ft. USGS. BUILDING STRONG ® BUILDING STRONG ® BUILDING STRONG ® BUILDING STRONG ® BUILDING STRONG ® BUILDING STRONG ® BUILDING STRONG ® 2280 2290 2300 2310 2320 2330 2340 2350 2360 2460 2450 2440 2430 2420 2410 2400 2390 2380 2370 … KOOTENAI RIVER AT LEONIA, ID. DTIC Archive, Dortch,Mark S, ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS, *DAMS, *CONDUITS, WATER FLOW, PRESSURE, ELECTRIC DISCHARGES, RIVERS, HYDRAULIC MODELS, WATERWAYS, RESERVOIRS, FLOOD CONTROL, MONTANA, AERATION, CAVITATION, WATER JETS, Collection dticarchive; additional_collections Language English. The dam is located on the Kootenai River, 17 miles upstream of Libby, Montana. The model study of the center sluice, Libby Dam… Kootenai River Flow: 7,000 Cubic Feet per second, 10-12 foot visibility, 57 degrees. 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. Mica 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. Water temps have risen to … comm.). At maximum pool, spillway capacity will be 145,000 cfs and regulating sluice capacity will be 61,000 cfs. For up-to-date… The level of Kootenay Lake is vital to operating our four hydroelectric dams on the Kootenay River. 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 … Technical questions may be referred to the Permanent Engineering Board. Dedicated on August 24, 1975, it is west of the continental divide, seventeen miles (27 km) upstream from the town of Libby. Water Temp: 43.34 ° F; Flow: 4120 ft³/s; Water Level: 17.86 ft. USGS. Lake levels fluctuate throughout the year and are generally highest in July, August and then decrease slightly throughout the fall. Provisional Data Warning Hydrologic Data: [8 Days Hourly] [Prior Month] Water Quality Data: Water Quality Data: Power: [Monthly Power Report] Project Description. The reservoir behind the dam, Lake Koocanusa, extends 90 miles upstream into British Columbia, Canada. Libby Dam and Lake Koocanusa. 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. Notice the departure from normal runoff starting 5/16 caused by above normal snow melt rates. The flow of two generators (700 m3/s each) is roughly equivalent to the average flow of the Iguacu Falls (1500 m3/s). All forecasts increased after the rain events around the 6/15 time frame. Dam) and flow from Libby Dam (P. McGrane, USACE, pers. Keenlyside Dam. Duncan Dam. • 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 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. The hydro electric turbine capacity is designed to handle 24,000 cubic feet per second (cfs), however due to heavy snow melt off and unexpected heavy spring rains the Libby dam had to release an additional 31,000 cubic feet per second (cfs) across the spillway as can be seen in the photos below. The Corps issued a ROD for Libby Dam Flood Control and Fish Operations in June 2008. Libby Dam Outflow Update Sturgeon Flow Releases to Begin by U.S. Army Corps of Engineers June 10, 2009. Treaty personnel are identified below. Kootenai River flows are augmented with additional releases of water from Libby Dam. Currently. Kootenai River bl Libby Dam nr Libby MT. That was 17 years ago, when the nearby Libby Dam was finished and the waters of the once-wild Kootenai River began backing up in this valley … Columbia River Treaty. Libby and Hungry Horse dams to augment flows in the lower Columbia River. This fall, like every fall since 2000, federal agencies have increased Columbia River flows below Bonneville Lock and Dam to ensure the redds of spawning chum salmon are created in areas that stay covered with water until the juvenile salmon emerge. Some water from the dam was released to enhance spawning. Dept of State - Treaty. Figure 15 Libby Dam Inflow Forecast from Water Supply, ESP and the COE. Currently . Contact Us. We monitor the lake levels throughout the year, which are governed by the 1938 International Joint Commission order on Kootenay Lake. Fisher River Flow: 177 cfs Yaak River Flow: 313 cfs Thompson River: 281 cfs Fishing Report: The River has stabilized at 7k, and most of the glacial silt has settled out. Basin Water Management. 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 . Reclamation's ROD for operations at Hungry Horse Dam was issued in August 2009. The river, named for the nearby Kootenai people (Kitunahan), still experiences fluctuations in water flow, but often allows for a leisurely rafting, canoeing or kayaking float trip for 20 miles below Jennings Rapid. The reservoir has a volume of 7.16 km3 and provides flood storage, hydroelectric power production, and recreation benefits. It called for a 20-foot draft from full pool at both Montana dams by the end of August, which adversely impacted resident fish growth during the critical period, summer and fall. Columbia Basin Trust. Currently. Libby Dam is a concrete gravity dam in the northwestern United States, on the Kootenai River in northwestern Montana. Libby Dam was authorized by Congress in the 1950 Flood Control Act for hydropower and flood protection, and construction was completed in 1973. 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. Treaty Review (US) Treaty Review (Canada) Treaty (BPA) Treaty - Digital Library. A proposed new dam on the Canadian side of Lake Koocanusa could cost hundreds of millions of dollars, according to a feasibility study that was done following concerns over water management.. Rapids and Float Notes. 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. The profile of Libby Dam is a right triangle. Seattle District: Lake Washington Ship Canal; Libby Dam; Hungry Horse Dam; Howard Hanson Dam 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. 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. The agency designed the flows to aid the downstream movement of young salmon smolts. Libby Dam, constructed in 1972, modified the flow and temperature regime of the river, which affected spawning and recruitment of white sturgeon. In 1994, flow in the Kootenai River at Banners Ferry, during white sturgeon migration and spawning, comprised primarily unregulated flow originating from tributaries below Libby Dam (local inflow). Modeling the Effect of Flow and Sediment Transport on White Sturgeon Spawning Habitat in the Kootenai River, Idaho Richard McDonald1; Jonathan Nelson, M.ASCE2; Vaughn Paragamian3; and Gary Barton4 Abstract: Kootenai River white sturgeon spawn in an 18-km reach of the Kootenai River, Id. Libby Dam. Currently. Libby Dam 16 May 2016 Libby Dam Water Management Overview 2016 Kootenai River White Sturgeon Libby Dam Flow Augmentation Operation . Outflow will further increase to full powerhouse capacity (approximately 27,000 cfs) at 6:00 am on Thursday morning, June 11. Outflow from Libby Dam will increase from the current rate of 13,500 cfs to 23,500 cfs on Wednesday evening, June 10 over a 2-hour period from 6:00 pm to 8:00 pm. The Libby dam reached an all time high water flow in June of 2006 since the dam was built in 1968. Libby Dam, the fourth and last dam built under the treaty, was completed in 1975 by the U.S. Army Corps of Engineers. 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