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Columbia River Treaty Review - Koocanusa/Kootenay

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Columbia River Treaty Review - Koocanusa/Kootenay Columbia River Treaty Review - Koocanusa/Kootenay Presented at Public Consultation Sessions Spring, 2012 1 OVERVIEW Koocanusa . Libby and the Columbia River Treaty . Libby operations . VarQ versus Standard flood control . Interests on Koocanusa reservoir Kootenay Lake and River . Kootenay Lake operation and the IJC order . Known interests on Kootenay Lake Libby and the Columbia River Treaty Review 2 Libby and the Columbia River Treaty Columbia River Treaty: . Provided the US with the option to build Libby Dam in Montana . Koocanusa reservoir floods 42 miles into Canada . Libby Dam provides flood and power benefits for Canada. Power generated at Libby belongs to the US Power benefits downstream in Canada on the Kootenay river stay in Canada . Coordination on Libby operation continues even if Treaty is terminated. Canada can request a change in operation. If it is not to the US disadvantage the US shall agree 3 Libby Operation Oct-Dec: . Libby drafted to reach the flood control level of 2411 ft on 31 Dec (Full pool = 2459 ft). Jan - Apr: . Ave/high snow pack years - continue drafting to stay on flood control curve . Low snow pack years - the flood control curve rises after 1 Jan May - Jul: . Maintain sufficient flood control space (typically 10-15 ft on Jun30) . Release “VarQ” flows (for bull trout and sturgeon) . Sturgeon release volumes increase in high snowpack years. For low water year there is no flow release for sturgeon. Typically reservoir peaks (within the top 5 to 10 ft) in mid-July. In low water years, the reservoir will not reach this range Aug – Sep (operation for downstream salmon) . Top 80% of runoff years - target 10 ft from full on 30 Sept . Bottom 20% of runoff years - target 20 ft from full on 30 Sept 4 VarQ versus Standard Flood Control . Since 2003, Corps has used VarQ flood control curves . VarQ curves are generally higher than Apr-Aug Libby forecast CRT63 VarQ standard flood control curves, except 0 4.5 MAF 3.5 under very high runoff conditions 1 4.5 5.5 MAF 2 . Higher Koocanusa levels between Jan 5.5 6.5 MAF 3 and July 4 6.5 7.5 MAF . Sturgeon Flows affect timing of release 5 7.5 8.0 MAF in May – Jul, not volume Requiredstorage (MAF) space 6 Oct Nov Dec Jan Feb Mar Apr . VarQ results in power losses in Canada, and may cause higher peak levels on Kootenay Lake . Libby Coordination Agreement allows BC to compensate itself for power loss. Discussing further mitigation measures for VarQ 5 Known Koocanusa Interests Recreation: . Boating access . Beach area . preferred range 2445-2455 ft Fish and Aquatic Resources: . Abundance and diversity . kokanee, trout Wild life and vegetation: . Grassland at northern end of reservoir . Nesting and wildlife habitat Archeological sites: . Identification and protection of sites Commercial Interests . Tourism, guide outfitters . House boat operators 6 Kootenay Lake and the IJC Order Kootenay Lake: . Operates under the International Joint commission (IJC) order. Influenced by Duncan and Libby operation . Controlled by Corra Linn Dam (FortisBC) . Discharge is limited by hydraulic constriction at Grohman Narrows 7 Treaty Flood Control Benefits - Kootenay Lake Kootenay Lake Levels (at Queens Bay) annual maximum & minimum 1765 1761.95 1961 1760 Duncan (1967) & Libby (1972) reservoirs reduce spring inflow to Kootenay Lake 1755 1750 Maximum Levels Lake level (feet) level Lake 1745 1740 Minimum Levels 1737.41 1944 1735 1931 1936 1941 1946 1951 1956 1961 1966 1971 1976 1981 1986 1991 1996 2001 2006 2011 Year 8 Known Kootenay Lake Interests Flooding of Private Property: . Localized flooding above 1750 ft. Significant flooding above 1755 ft . Dyke erosion with higher levels and flows Fish and Aquatic Resources: . West arm shoal spawning kokanee . White sturgeon adult and juvenile rearing habitat . Nutrient restoration program Wild life and vegetation: . Wetlands and Duck Lake Archeological sites: . Identification and protection of sites Commercial Interests . Tourism, guide outfitters Ferry Navigation on West Arm . Levels below 1738 ft can impact Harrop-Proctor and Balfour ferries 9 Libby and the CRT Review Called Upon flood control . Could require deeper draft more frequently at Libby . Coordinated Flood Risk Management within the Treaty Framework may be able to mitigate deeper drafts. Canadian Domestic Trade off . Higher Koocanusa levels May – Jul may increase peak levels at Kootenay Lk US Domestic Law . Sturgeon spring flows and Aug/Sep salmon releases from Libby are court ordered . US will not agree to an operation that violates their domestic law. Treaty Review Work plan . Investigate Coordinated Flood Risk Management . Investigate Libby alternatives that are within US and Canadian laws . Will analyse impacts on Koocanusa and Kootenay interests 10 .
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