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October 9 , 2014

Cowlitz Falls North Shore Collector Request for Qualifications pre-proposal meeting design review october 9, 2014. By Kirk Kessler, P.E. October 9 , 2014. Agenda. October 9, 2014. Tacoma Power’s Cowlitz Project Overview Cowlitz Falls North Shore Collector (CFNSC) Design Review

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October 9 , 2014

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  1. Cowlitz Falls North Shore CollectorRequest for Qualificationspre-proposal meeting design reviewoctober9, 2014 • By Kirk Kessler, P.E. October 9, 2014

  2. Agenda October9, 2014 • Tacoma Power’s Cowlitz Project Overview • Cowlitz Falls North Shore Collector (CFNSC) Design Review • Construction Schedule • In-Water Work & Reservoir Operation Constraints

  3. Cowlitz Project Overview Cowlitz River Basin Cowlitz River October9, 2014

  4. Lake Scanewa Cowlitz River Cowlitz Falls Dam Cispus River October9, 2014

  5. Cowlitz Falls North Shore Collector Pumpback Discharge Structure 500cfs Pumps (Expandable to 750cfs) Upstream Face of Dam Pumpback Pipe Entrance thru Dam Primary & Secondary Screens Bypass Channel Existing CFFF Flume Tailrace Diffuser October9, 2014 Slide5

  6. Cowlitz Falls North Shore Collector Pumpback Discharge Structure Collector Location October9, 2014 Slide6

  7. Cowlitz Falls North Shore Collector October9, 2014 Slide7

  8. Cowlitz Falls North Shore Collector October 9, 2014 Slide8

  9. Cowlitz Falls North Shore Collector October 9, 2014 Slide9

  10. Cowlitz Falls North Shore Collector October9, 2014 Slide10

  11. Cowlitz Falls North Shore Collector Collector Entrance October 9, 2014 Slide11

  12. Construction schedule • Advertise for Bid …………….........................….….....December 2014 • Open Bids……………………….…………………….…..February 2015 • Commence Construction……………….…………..…..March 2015 • Complete Construction ……………………....….….December 2016 October9, 2014 Slide12

  13. In-Water Work & Reservoir Operation Constraints • Typical Reservoir Ops: • Held between elev. 860 – 862 (unless under flood condition) • Construction Constraints: • Work conducted below OHWM (elev. 862) must be conducted during two approved work windows • September 1st thru December 31st 2015 • September 1st thru December 31st 2016 • Reservoir drawdowns (below elev. 860) must be conducted during work windows • Rules regarding the scheduling, duration, and penalties for reservoir adjustments will be detailed in the general bid specification October9, 2014 Slide13

  14. Questions? October9, 2014 Slide 14

  15. Cowlitz Falls North Shore Collector October9, 2014 Slide15

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