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 PROJECT OVERVIEW

Cowlitz River

Slide 3 October 9, 2014

Cowlitz River Basin

LAKE SCANEWA

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Cispus River

Cowlitz Falls Dam

Cowlitz River

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

COWLITZ FALLS NORTH SHORE COLLECTOR

October 9, 2014 Slide 7

COWLITZ FALLS NORTH SHORE COLLECTOR

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COWLITZ FALLS NORTH SHORE COLLECTOR

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COWLITZ FALLS NORTH SHORE COLLECTOR

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COWLITZ FALLS NORTH SHORE COLLECTOR

Collector Entrance

October 9, 2014 Slide 11

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

QUESTIONS?

October 9, 2014 Slide 14

COWLITZ FALLS NORTH SHORE COLLECTOR

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