COWLITZ FALLS NORTH SHORE COLLECTOR REQUEST FOR QUALIFICATIONS PRE-PROPOSAL MEETING DESIGN REVIEW...
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Transcript of COWLITZ FALLS NORTH SHORE COLLECTOR REQUEST FOR QUALIFICATIONS PRE-PROPOSAL MEETING DESIGN REVIEW...
COWLITZ FALLS NORTH SHORE COLLECTORREQUEST FOR QUALIFICATIONS
PRE-PROPOSAL MEETING DESIGN REVIEW
OCTOBER 9, 2014
Slide 1 October 9, 2014
BY KIRK KESSLER, P.E.
AGENDA
Tacoma Power’s Cowlitz Project Overview
Cowlitz Falls North Shore Collector (CFNSC) Design Review
Construction Schedule
In-Water Work & Reservoir Operation Constraints
Slide 2 October 9, 2014
COWLITZ FALLS NORTH SHORE COLLECTOR
October 9, 2014 Slide 5
Upstream Face of Dam
Pumpback Discharge Structure
Primary & Secondary Screens
Existing CFFFFlume
Bypass Channel
Entrance thru DamTailrace Diffuser
500cfs Pumps (Expandable to 750cfs)
Pumpback Pipe
COWLITZ FALLS NORTH SHORE COLLECTOR
October 9, 2014 Slide 6
Pumpback Discharge Structure
Collector Location
CONSTRUCTION SCHEDULE
Advertise for Bid …………….........................….….....December 2014
Open Bids……………………….…………………….…..February 2015
Commence Construction……………….…………..…..March 2015
Complete Construction ……………………....….….December 2016
October 9, 2014 Slide 12
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
October 9, 2014 Slide 13