Appendix A: BC Hydro Dams

Dam Safety Program Annual Report 2002/2003

BC Hydro Dams DAM

CC [1]

TYPE [2]

YR.

HT. (m)

Aberfeldie

H

PG

1953

32

Aberfeldie

Aberfeldie Headpond

Alouette

VH

TE

1926

21

Alouette

Alouette Lake Reservoir

Bear Creek

L

TE

1958

19

Jordan River

Bear Creek Reservoir

Buntzen

L

PG

1903

16.5

Buntzen 1 & 2

Buntzen Lake Reservoir

Cheakamus

H

TE/PG

1957

29

Cheakamus

Daisy Lake Reservoir

Clayton Falls

L

PG

1961

7

Clayton Falls

Clayton Falls Headpond

Clowhom

L

PG

1958

22

Clowhom

Clowhom Lake Reservoir

Comox

H

PG

1912

10.7

Puntledge

Comox Lake Reservoir

3000

Coquitlam

EX

TE

1914

30

-

Coquitlam Reservoir

1250

Coursier

H

TE

1963

19

Walter Hardman

Coursier Lake Reservoir

Duncan

H

TE

1967

38.7

-

Duncan Reservoir

Elko

L

PG

1924

16

Elko

Elko Headpond

-

Elliott

L

PG

1971

27.4

Jordan River

Elliott Headpond

-

Elsie

VH

TE

1958

31

Ash River

Elsie Lake Reservoir

658

Falls River

VL

PG

1930

13

Falls River

Bigs Falls Headpond

-

Heber Diversion

VL

ER/T

1958

9.8

Strathcona

Heber River Headpond

-

Hugh Keenleyside

VH

TE/PG

1968

52

-

Arrow Lakes Reservoir

51 600

John Hart

VH

TE/PG

1947

34

John Hart

John Hart Reservoir

250

Jordan Diversion

H

CB

1913

39.9

Jordan River

Jordan Diversion Reservoir

168

Kootenay Canal

H

PG/ER

1975

38

Kootenay Canal

Kootenay Canal Headpond

La Joie

VH

ER

1948

87

La Joie

Downton Reservoir

Ladore

VH

PG

1949

37.5

Ladore

Lower Campbell Lake Reservoir

Mica

EX

TE

1972

244

Mica

Kinbasket Reservoir

Peace Canyon

VH

PG

1979

61

Peace Canyon

Dinosaur Reservoir

Puntledge Diversion

L

PG

1912

5.5

Puntledge

Puntledge Headpond

Quinsam Diversion

L

PG

1957

15

Ladore

Quinsam Diversion Headpond

Quinsam Storage

L

PG

1957

9

Ladore

Upper Quinsam Lake Reservoir

Revelstoke

VH

TE/PG

1984

175

Revelstoke

Revelstoke Reservoir

Ruskin

VH

PG

1930

59.4

Ruskin

Hayward Lake Reservoir

300

Salmon River Diversion

VL

ER/T

1957

5.5

Ladore

Salmon River Headpond

-

Seton

H

PG

1956

14.4

Seton

Seton Lake Reservoir

2460

Seven Mile

VH

PG

1980

80

Seven Mile

Seven Mile Reservoir

410

Spillimacheen

L

PG

1955

14.5

Spillimacheen

Spillimacheen Headpond

Stave Falls

VH

PG

1911

26

Stave Falls

Stave Lake Reservoir

6200

Strathcona

VH

TE

1958

53

Strathcona

Upper Campbell Lake, Buttle Lake Reservoir

6680

Sugar Lake

H

CB

1942

13.4

Shuswap Falls

Sugar Lake Reservoir

2100

Terzaghi

VH

TE

1960

60

Bridge River 1 & 2

Carpenter Reservoir

4800

WAC Bennett

VH

TE

1968

183

GM Shrum

Williston Reservoir

Wahleach

H

TE

1953

21

Wahleach

Jones Lake Reservoir

Walter Hardman

L

TE

1960

12

Walter Hardman

Walter Hardman Headpond

Whatshan

L

PG

1951

12

Whatshan

Whatshan Lake Reservoir

Wilsey

H

VA

1929

30

Shuswap Falls

Wilsey Headpond

[1] [2]

GENERATING STATION

RESERVOIR/HEADPOND

RES. AREA (ha) 1600 75 185 4300 800

200 7150

2400 3700 42 500 890 564 11530

-

117 000 490 1700 -

This overall Consequence Category is assigned for purposes of planning and scheduling activities of the Dam Safety Program. Main dam at site: PG concrete gravity, CB concrete buttress, VA concrete arch, TE earthfill, ER rockfill, ER/T rockfill timber crib

Dam Safety Program Annual Report 2002/2003

Appendix B: Advisory Boards

Dam Safety Program Annual Report 2002/2003

Dam Safety Advisory Boards PROJECT

NAMES

MEETING NO.

DATE

Coquitlam

Dr. N. Morgenstern, Alberta1 Mr. A. Williams, Australia2

1 2

July 2001 June 2002

Elsie

Mr. J. Gordon, Quebec Dr. N. Morgenstern, Alberta

1 2 3

June 2000 February 2001 July 2001

Hugh Keenleyside

Mr. J. Farrell, British Columbia3 Dr. K. Hoeg, Norway4 Dr. J. McQuaid, UK5

1 2

April 2000 June 2002

John Hart / Ladore

Mr. J. Gordon, Quebec Dr. C. Guillaud, Quebec

1

November 2002

Mica

Mr. U. Norstedt, Sweden6 Dr. P. Vaughan, UK7

1 2

October 2001 June 2002

Dr. E. Hoek, British Columbia Dr. W. Riemer, Luxembourg

1 2

September 2001

Ruskin/Stave Falls

Dr. R. Hall, USA

1

September 2002

Seton

Mr. J. Gordon, Quebec

1

November 2002

Seven Mile

Mr. D. Coulson, Quebec Mr. J. Gordon, Quebec Mr. L. McDonald, Australia8

1 2 3 4 5 6

March 2000 November 2000 June 2001 November 2001 February 2002 November 2002

Strathcona

Dr. J. France, USA Dr. Y. Ghanaat, USA

1

January 2003

• Rip Rap

Dr. J. van der Meer, Netherlands

1

November 2002

• Weir R1

Dr. R. Benson, British Columbia

1

July 2002

• Dam Performance Surveillance

Dr. E. DiBiagio, Norway (External Reviewer)

1 2

September 2001 December 2002

Revelstoke Dam • Checkerboard Slope

WAC Bennett

1 Professor Emeritus, University of Alberta 2 Vice Chairman, New South Wales Dam Safety Commmittee; former Vice President Austral-Asia, International Commission on Large Dams (ICOLD) 3 Former Dam Safety Regulator, British Columbia 4 Former President, ICOLD 5 Former Chief Scientist, Health and Safety Executive; member, Board of Governors of the European Commission’s Joint Research Centre 6 Manager of Dam Safety, Vattenfall Vattenkraft, and Chair President’s Advisory Committee, ICOLD 7 Professsor Emeritus, Imperial College, London 8 Chairman, New South Wales Dam Safety (Regulatory) Committee Dam Safety Program Annual Report 2002/2003

Appendix C: Capital Projects

Dam Safety Program Annual Report 2002/2003

Table 1: Dam Safety Improvement Projects

$ Thousands Actuals (Current Year)

Total Actuals (To Date)

44 591 3,635 130 21 849 694 72 17 60 12,024 23 369 342 119

46 633 10,800 130 60 854 694 171 17 156 23,249 23 1,356 342 119

Total Project Forecast

Active System Wide Coursier Elsie John Hart Kootenay Canal Mica Mica Ruskin Ruskin Seton Seven Mile Stave Falls Terzaghi WAC Bennett WAC Bennett

Strong motion accelerograph (SMA) upgrade Decommission dam Remediate seismic deficiencies; dam and intake structure Spillway reliability improvements Penstock improvements Dutchman's drainage adit portal structure replacement Instrumentation improvements Install ADAS Strengthen concrete dam, anchors Spillway remediation Dam anchoring, spillway and system improvements Strengthen Blind Slough spillway Upgrade seepage cutoff) Weir 1 foundation grouting Riprap

TOTAL

733 5,262* 16,850 375 84 950 1,661 192 13,472 † 1,766 83,606 6,321 9,317 1,270 11,973 153,832

In-service La Joie Revelstoke Ruskin Strathcona Sugar Lake

Weir instrumentation upgrade Checkerboard Creek slope performance and ADAS Provide emergency power source for spillway gates Repair riprap Flood and earthquake stability improvements

8 14 15 296 485

167 355 280 610 570

TOTAL

172 355 280 610 570 1,987

Future†† Coquitlam Falls River Hugh Keenleyside Hugh Keenleyside John Hart La Joie Peace Canyon Ruskin Seton Strathcona Strathcona Strathcona Terzaghi WAC Bennett WAC Bennett

Seismic improvements Discharge facility reliability improvement Concrete dam anchoring Seismic improvement of earthfill dam Spillway capacity improvements Dam safety improvements Early attention items Right abutment seepage Canal instrumentation upgrade Embankment dam improvements Intake tower stabilization Spillway gate improvements Emergency Warning system Observation well instrumentation grouting Peace River early warning system

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

200,298

TOTAL

Total (Active, Planned and Future)

39,546 109 4,825 81,304 9,887 33,000 327 11,731 436 11,523 5,091 436 436 714 933

$356 million

∗ Plus asset book value of $4.9 million not included herein †

Large range in total project cost depending on final upgrade option selected. Currently, evaluating various options.

††

There is significant uncertainty in costs for future projects where final designs have not been developed.

Dam Safety Program Annual Report 2002/2003

Table 2: Deficiency Investigations

$ Thousands Priority

Actuals (Current Year)

Total Actuals (To Date)

Total Project Forecast

1, 8 2 3 4 5 6 7, 9 10, 13 11 12 14

1,746 141 283 52 73 269 1,036 257 300 203 126

2,525 1,067 543 52 226 822 1,370 454 3,799 283 150

3,943 1,682 560 1,552 676 872 1,792 529 3,850 725 1,113

15, 17 18 19 20 21 23

321 79 43 302 66 26

2,122 210 43 900 66 224

4,214 1,194 392 1,200 114 497

Active Coquitlam La Joie Mica Mica Mica Strathcona Ruskin John Hart WAC Bennett WAC Bennett Terzaghi Hugh Keenleyside Peace Canyon Revelstoke Seton Seton John Hart

Seismic performance and remedial options Seismic stability; shotcrete facing leakage Core and inner shell filtering Performance assessment (seepage model) Flood and seismic capacity; slopes; evacuation Riprap; power outlet seismic stability; gate P&C; PBS pilot Ruskin Dam and Stave Falls (Blind Slough) Spillway gate operation after seismic event – JHT & LDR Embankment dam, sinkhole, riprap, perf. monitoring Fines migration Performance assessment, emergency warning system, seismic stability Seismic evaluation of earthfill and concrete dams Seismic stability and reservoir evacuation Checkerboard Creek slope performance Power canal; spillway capacity Performance assessment of power canal Stability of Big Slide, Small Slide

TOTAL

24,905

Future Revelstoke Duncan WAC Bennett Alouette Kootenay Canal Jordan Diversion Aberfeldie Puntledge Diversion Clowhom Heber Diversion Spillimacheen John Hart Mica Strathcona

Transition wall seismic stability, and other issues Seismic stability and other issues Non embankment dam Seismic stability of dam and spillway Saddle dams; concrete dams; gate closure Seismic stability Spillway and river bank stability Seismic stability x-stream overflow spillways Seismic stability and Spillway gate reliability Dam stability Structural stability Spillway capacity issues (Campbell River system) PMF and inundation study Embankment dam and power outlets – seismic stability

16 22 24 25 26 27 28 29 30 31 32

0 0 6 0 0 0 0 0 0 0 0 0 0 0

TOTAL

0 0 18 0 0 0 0 0 0 0 0 0 0 0

500 200 328 140 100 50 100 30 250 25 100 300* 332* 880* 3,335

______________________________ * Potential new projects identified during F2003, and not yet assigned a priority.

Dam Safety Program Annual Report 2002/2003