Recent Flooding and Flood Mitigation in Manitoba • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Eugene F. Kozera, P. Eng. Director, Water Control System Management Branch Water Stewardship Saskatchewan R.
Souris Winnipeg Red 250,000 Red River: 1826 natural in 200,000 Winnipeg 1997 2 1852 0 2 0 150,000 0 9 1 1 1950 1979
100,000 Flow (cubic (cubic Flowfeet second) per
50,000
0 50,000
45,000 Assiniboine River 1882 2011 40,000 at Brandon
35,000 1904 1995 30,000
25,000 1923 1955 1976 20,000
15,000 Flow (cubic (cubic Flowfeet second) per
10,000
5,000
0 30,000 Souris River at Westhope
25,000 2011
20,000 1882
15,000 1976
10,000 Flow (cubic (cubic Flowfeet second) per
5,000
0 Assiniboine River dikes east of Portage Assiniboine R. dikes 1950 flood
Damages: over $700 M 100,000 people evacuated 10,000 homes flooded Winnipeg’s •Built in 1950 and 1951 Primary Dikes •Top of dikes: 4 ft below 1950 peak water level
Cost: $4.6 million (Canada, Manitoba, City of Winnipeg) Winnipeg Portage Brandon Portage Winnipeg Portage Brandon Diversion Winnipeg Portage Brandon Assiniboine
River
River Red Elm Creek Channel
River Bryson Drain E. Red Floodway Seine River
La 1966 Red River Valley flood Salle Seine River Diversion River St. Adolphe Manning
Canal 11 - A Drain
Norquay Channel Brunkild D - 20 Drain
Tourond Creek
Rat
Morris R.
R. Rosenort Morris L.
River River
Tobacco Creek Creek Red Graham Morris Creek 1967-72: $5.4 M non Creek Shan
River Shannon St. Jean Baptiste Marsh Deadhorse Creek 1980-89: $5.4 M R. Deadhorse Creek
Plum Drain River Hespeler Roseau
Drain Letellier Dominion
Ck Main Rosenheim
Dr. City Buffalo Morris Emerson 1997 Red River Valley flood Morris
Flood preparation, fighting, damages: $500 M
Ste. Agathe Evacuations: 28,000 people Assiniboine
River
River Red Elm Creek Channel
River Bryson Drain E. Red Floodway Seine River
La Salle
Seine River Diversion River Community flood protection Manning
Canal 11 - A Drain Niverville 14 new or expanded Norquay Channel Ste. Agathe D - 20 Drain communities dike Tourond Creek
Rat Morris Rosenort Aubigny R. $35.5 M R. Morris L.
River River St. Pierre Tobacco Creek Riverside Creek Red Jolys Graham Creek non Creek
Shan Lowe Farm
River
Shannon
Marsh Deadhorse Creek R. Deadhorse Creek Rosenfeld Plum Drain River Hespeler Roseau
Drain Dominion
Ck Main Rosenheim
Dr. City Buffalo Gretna Emerson Raising Diking
Individual flood protection: 1,750 structures; $59 M Retaining wall Structural dike Winnipeg secondary ring dikes
– 23 sites considered
– 9 sites short-listed
– $10.4 M Existing Stations Enhanced hydrometric network Upgraded Stations Reactivated Stations New Stations
Manitoba Floodway Expansion - Channel Excavation
$665 M - bridges - Inlet control structure - west dike % of normal soil Moisture at freeze-up
5th wettest September through February May 2011: % of normal precipitation June 19: major rain storm June 2011 Precipitation: % of normal
175
171
165
310 215 324 191 142 172 50,000
45,000 Assiniboine River (330-year) 1882 2011 40,000 at Brandon
35,000 1904 1995 30,000
25,000 1923 1955 1976 20,000
15,000 Flow (cubic (cubic Flowfeet second) per
10,000
5,000
0 30,000 Souris River at Westhope 25,000 (213-year) 2011
20,000 1882
15,000 1976
10,000 Flow (cubic (cubic Flowfeet second) per
5,000
0 9,000,000 Total Volume of Water Flowing Down the Assiniboine River Total VolumeBetween of April Water and July Flowing Annually Down the 9,000,0008,000,000 Assiniboine River Between April and July 2011: 8,000,0007,000,000 8.3 M ac-ft 7,000,000 6,000,000
6,000,000 5,000,000 ac-ft 5,000,000 1976 4,000,000 4,000,000 1995 3,000,000 3,000,000 2,000,000 2,000,000 1,000,000 1,000,000
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-
1969 2007 1961 1963 1965 1967 1971 1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005 2009
1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2011
Upper portion of Souris River Basin Gets Slammed cfs Minot, North Dakota Brandon Brandon: major dike raising (earth and super sand bags) Souris Wawanesa
Melita Capacity = Design = 25,000 cfs 18,000 cfs 2011: 34,000 cfs
Winnipeg Brandon
2011 peak flow near 53,000
Portage Diversion Assiniboine River Dikes – Massive Effort to Reinforce
Canadian Armed Forces Called in to Help cfs Portage Diversion: reinforcing drop structures
Portage Diversion: raising dikes along channel Capacity = Design = 25,000 cfs 18,000 cfs 2011: 34,000 cfs
Winnipeg Brandon Hoop and Holler release: 400 cfs 2011 peak flow near 53,000
Portage Diversion Controlled release at Assiniboine River dikes (at Hoop and Holler)
Lake Winnipegosis
Waterhen R.
Dauphin Lake
Whitemud Portage Diversion May 31st: Lake Manitoba at 815.3 ft, and major wind storm Lake Manitoba peaked at 817.15 ft btwn July 12 - 25 (wind
eliminated) cfs Peak: 817.15 ft.
May 31 Storm cfs Waterhen R.
Lake St. Martin
Portage Diversion Lake St. Martin Ralls Island diking Saskatchewan R.
Carrot River temp dikes
Souris Winnipeg Red At height of flooding, 840 municipal and provincial roads closed or affected
Total evacuees: 7,165
Local states of emergency: 70
Long flood!! Man. Emergency Coordination Centre was open 103 days (44 in 1997) Flood Mitigation
• Individual Flood Protection – $75M in financial assistance • For raising, diking, terracing or moving • Homes, and farm and business buildings: 86%, up to $100,000 project • Cottage: 86%, up to $40,000 project • Lake Manitoba: first $20,000 is 100% grant • 1,600 applications to date
• New community flood protection • 2010: 8 feasibility studies • 2011: application deadline is November 30th • Construction: $30M in 90% grants
• Converting emergency dikes into permanent dikes • $20M for 17 projects • Communities such as Souris, Melita, Wawanesa, Lake Manitoba Narrows, Peltz Drive/St. Peter’s Road Flood Mitigation
• Community diking • Brandon: grant for raising to new design level • Petersfield: grant for construction/raising to new design level
• Shellmouth: install gates on the spillway ($8 M)
• Portage Diversion: assessment and upgrading ($7.4 M)
• Lake St. Martin emergency channel - $100M • Fairford Control Bypass - $60M Lake Dauphin R. Winnipeg Flood Mitigation Continues...
Emergency outlet channel
Lake St. Martin Emergency Channel from Lake St. Martin Lake Manitoba to Big Buffalo Lake N Fairford R. Fairford Bypass Projected Lake Manitoba water levels
Thank You
Questions?