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Bow River Basin Identification of Possible Flood Storage Opportunities Presentation to the Water Collaborative Group - Calgary 17 September 2015 General Points

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Bow River Basin Identification of Possible Flood Storage Opportunities Presentation to the Water Collaborative Group - Calgary 17 September 2015 General Points Bow River Basin Identification of Possible Flood Storage Opportunities Presentation to the Water Collaborative Group - Calgary 17 September 2015 General Points ► Amec Foster Wheeler was asked to identify potential flood storage opportunities within the Bow River watershed upstream of Calgary. ► The identification process did not take into consideration: ► Economics (benefit/cost ratio) ► Land ownership or rights ► Environmental impact ► Geotechnical feasibility or potential geohazards ► Socio-political aspects ► Administrative boundaries ► Any work that is currently being undertaken or planned by the City of Calgary. ► The work was conducted at a high level to determine if, and where, flood storage opportunities exist within the Bow Basin River watershed. 2 Bow River Requirements to Mitigate the June 2013 Flood Mitigation efforts being undertaken by the City of Calgary may significantly increase this threshold and reduce the storage Approx 1,040 volume required. m3/s 200,000 dam3 flood peak flow storage required reduction required 800 m3/s flow through Calgary June 2013 before flood damage occurs Flood Hydrograph 3 General Points ► A total of 11 potential flood storage concepts have been identified. ► 4 are classified as operational opportunities using existing facilities ► 7 are classified as new project opportunities. ► Further study is required to determine concept viability and feasibility 4 Flood Storage Opportunities Location Map 5 Potential Operational Opportunities in Tributary Watersheds with Existing Facilities ► 1. Cascade River Basin Upstream of Lake Minnewanka. ► 644 km2 regulated area (8.5% of the Bow Basin upstream of Elbow River) ► 2. Spray River Basin Upstream of Spray Lakes Reservoir ► 510 km2 regulated area (6.6% of the Bow Basin upstream of Elbow River) ► 3. Kananaskis River Basin Upstream of Lower Kananaskis Lake ► 360 km2 regulated area (4.6% of the Bow Basin upstream of Elbow River) 6 Bow River Requirements to Mitigate the June 2013 Flood Effect of existing flow regulation in the basin (95,000 dam3 volume reduction) 3 Approx 1040 m /s 200,000 dam3 flood peak flow reduction storage required required 800 m3/s flow through Calgary before flood damage occurs 7 New Opportunities in Tributary Watersheds 4. & 5. North Ghost River and Ghost River ► 4. New Diversion to Lake Minnewanka ► Approx 20,000 dam3 ► 5. Dam location upstream of Waiparous Creek ► General area had previously been identified by the Flood Advisory Panel ► 50,000 dam3 to 70,000 dam3 storage potential Canmore Calgary 8 New Opportunities in Tributary Watersheds 6. Waiparous Creek ► Dam upstream of the Ghost River ► General location had previously been identified by the Flood Advisory Panel ► Approximately 30,000 dam3 to 40,000 dam3 storage potential Canmore Calgary 9 New Opportunities in Tributary Watersheds 7. Kananaskis River ► Dam on Kananaskis River upstream of Barrier Lake ► Approximately 80,000 dam3 to 90,000 dam3 storage potential Canmore Calgary 10 New Opportunities in Tributary Watersheds 8. Jumpingpound Creek ► Dam upstream of Cochrane ► Approximately 50,000 dam3 to 70,000 dam3 storage potential Canmore Calgary 11 New Opportunities on Bow River Mainstem 9., 10. & 11. Ghost, Bearspaw, Morley ► 9. Ghost Lake Drawdown (Operational) ► Approx. 50,000 dam3 to 70,000 dam3 storage potential ► 10. Dam upstream of Bearspaw Reservoir ► Approx. 60,000 dam3 to 80,000 dam3 storage potential Calgary ► 11. Dam upstream of Ghost Lake near Morley ► > 150,000 dam3 storage potential 12 Summary Table Reference Scheme Description River Storage Type of Mitigation Available or Opportunity (dam3) 1 Spray River N/A Operational Operational Spray River basin upstream of Spray Lakes Reservoir Opportunities in 2 Cascade River N/A Operational Tributary Cascade River Basin upstream of Lake Minnewanka Watersheds Kananaskis River Basin upstream of Lower Kananaskis Kananaskis 3 N/A Operational Lake River North Ghost 4 Upper Ghost River Diversion into Lake Minnewanka Est 20,000 New Project River 5 Dam on Ghost River Upstream of Waiparous Creek Ghost River 50,000 to 70,000 New Project New Projects on Tributaries to the Waiparous 6 Dam on Waiparous Creek Upstream of Ghost River 30,000 to 40,000 New Project Bow River Creek Dam on Kananaskis River near Upstream end of Barrier Kananaskis 7 80,000 to 90,000 New Project Lake River Dam on Jumpingpound Creek Upstream of Bow River Jumpingpound 8 50,000 to 70,000 New Project Confluence Creek Operational Opportunity on Bow 9 Ghost Reservoir Dam Drawdown Bow River 50,000 to 70,000 Operational River Mainstem New Projects on 10 Dam on Bow River Upstream of Bearspaw Reservoir Bow River 60,000 to 80,000 New Project Bow River Mainstem 11 Dam on Bow River upstream of Ghost Lake (Morley) Bow River >150,000 New Project 13 Questions Questions? 14 .
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