| Pointe du Bois Spillway Replacement Project EIS| June 2011 1.1

1.0 INTRODUCTION

1.1 Need and Purpose

The Pointe du Bois Generating Station1

Despite extensive repairs and upgrades that have been conducted over the years, the spillway facilities at Pointe du Bois require replacement in order to maintain public and dam safety and provide a safer working environment for staff. Accordingly, Manitoba Hydro has decided to undertake the Pointe du Bois Spillway Replacement Project (the Project). With these improvements, the current Canadian Dam Association Dam Safety Guidelines (2007) will be addressed.

is the oldest hydroelectric plant operating in Manitoba. The station was constructed between 1909 and 1926 with the first unit put into service in 1911. The existing spillway facilities consist of ninety-seven spillway/sluiceway bays. With the exception of six remotely controlled bays, they are manually operated. In 2002, Manitoba Hydro acquired the station as part of the purchase of Winnipeg Hydro. Figure 1.1 illustrates the general location of the Pointe du Bois facilities.

1.2 Scope of the Spillway Replacement Project

The Project will be constructed just downstream of the existing spillway and rockfill dam. It will consist of the following activities and components:

♦ Construction and operation of the following permanent structures:

• Primary spillway including approach and discharge channels;

• Secondary spillway;

• Transition structures and wing walls; and

• Earthfill dams.

♦ Construction and operation of the following permanent infrastructure:

• Construction/permanent power; and

• Townsite access roadway.

♦ Construction and decommissioning of the following construction infrastructure:

• Work areas;

• Buildings;

• Concrete batch plants and crushing operations;

1 Words shown in bold contain a definition that is described in greater detail in the Glossary found in Chapter 13.0.

| Pointe du Bois Spillway Replacement Project EIS| June 2011 1.2

• Construction access (includes barge landings, winter ice roads and lower spillway shelf road);

• Construction roadways;

• Stabilization of the east gravity dam;

• Material source areas;

• Excavated material placement area;

• Cofferdams;

• Stormwater management ponds;

• Water, wastewater and waste management;

• Fuel storage and transportation; and

• Explosives storage.

♦ Decommissioning of the following existing structures:

• Existing spillway and water retaining structures (not including the powerhouse).

The existing powerhouse will continue to be operated and maintained. The operation and maintenance of the powerhouse is not within the scope of the Spillway Replacement Project.

The general arrangement of the Project is outlined on Figure 1.2.

307

317

315

213

435

313

314

302

214

520

408 309206 212

302

Whiteshell Provincial Park

Nopiming Provincial Park

Birds Hill Provincial Park

Grand Beach Provincial Park

Beaudry Provincial Park

Camp Morton Provincial Park

Whitemouth Falls Provincial Park

Patricia Beach Provincial Park

Winnipeg Beach Provincial Park

Duff Roblin Park Reserve

Poplar Bay Provincial Park

Norris Lake Provincial Park

Hyland Provincial Park

Lockport Provincial Park

Memorial Provincial Park

River Road Provincial Park

Netley Creek Provincial Park

Pinawa Provincial Park

Libau

Pinawa

Dugald

Warren

Rosser

Inwood

Gimili

Teulon

Selkirk

Narcisse

Stonewall

Powerview

Birds Hill

Pine Falls

Fraserwood

Clandeboye

Headingley

Whitemouth

Beausejour

Grand Beach

Milner Ridge

Lac du Bonnet

Winnipeg Beach

Stony Mountain

Victoria Beach

St. Francois Xavier

Winnipeg

Selkirk G.S.

McArthur G.S.

Pine Falls G.S.

Great Falls G.S.

Slave Falls G.S.

Seven Sisters G.S.

Pointe du Bois G.S.

Pinawa Dam Provincial Park

DATA SOURCE: Pointe du BoisSpillway Replacement Project

File L

ocati

on:

Manitoba Hydro, Government of Canada,Province of Manitoba

DATE CREATED: CREATED BY:

REVISION NO: REVISION DATE: QA/QC:

VERSION: 1.0 RHP, MWZ0 3 6 Miles

0 8 16 Kilometres 02 FEB 2010 HPP - GIS & Special Studies

31 MAY 2011

Legend

ROAD - GENERAL

RAIL LINE

Generating Stations (G.S.)

Pointe du Bois G.S

Provincial Parks

Reserve Land

Project Location

Project Location MapFigure:

1.1

GillamThompson

Winnipeg

Churchill Hudson Bay

Flin Flon

LakeManitoba

Brandon

LakeWinnipeg

The Pas

Dauphin

90°W

90°W

95°W

95°W

100°W

100°W

105°W

105°W60°N

55°N55°N

50°N50°N

DATA SOURCE: Pointe du BoisSpillway Replacement Project

File L

ocati

on:

Manitoba Hydro, KGS Acres

DATE CREATED: CREATED BY:

REVISION NO: REVISION DATE: QA/QC:

VERSION: 1.0 RHP, MWZ, BMP0 0.05 0.1 Miles

0 0.1 0.2 Kilometres12 MAY 2011 HPP - GIS & Special Studies

Principal Structures Figure:1.2

East MainDam

Discharge Channel

Primary SpillwayEast Abutment Dam

Approach Channel

West MainDam

Powerhouse East AbutmentTransition Wall

South Dam

31 MAY 2011

Secondary Spillway