Sewer service interruptions
Untreated wastewater discharges from the wastewater collection system to the river system:
2006
| Date |
Location |
Estimated
discharge |
Estimated
duration |
Cause |
Incident details and response |
| October 18 |
Assiniboine River - Ash sewage pumping station |
18000 litres |
8 minutes |
Water main break |
- High level alarm received at 3:32 p.m.
- Crew arrived at 3:40 p.m. and determined flow to the station exceeding pumping capacity due to large volume of drinking water draining into the Ash combined sewer from water main break at Niagara and Fleet.
- Crew immediately began closing gate on outfall pipe but observed start of discharge of diluted raw sewage to the river at 3:47 p.m.
- Gate completely closed at 3:55 p.m. and discharge stopped.
- Water main break isolated and sewer levels began dropping.
- Alarm ended at 5:23 p.m. and gate opened at 6:15 p.m.
- Incident reported to Manitoba Conservation, Manitoba Environmental Accident Reporting Line and Environment Canada.
|
| August 22 |
Red River - Ducharme land drainage sewer |
7300 litres |
45 minutes |
Installed sewer plug |
- High level alarm received around 12:15 p.m.
- Estimate overflow began at 12:20 p.m.
- Responding crew discovered that a contractor working in the Ducharme sanitary sewer had installed a sewer plug, which caused sewage to back up into the Ducharme land drainage sewer.
- Contractor called and plug removed.
- Sewer levels returned to normal and discharge of sewage stopped at 1:05 p.m.
- Incident reported to Manitoba Conservation, Manitoba Environmental Accident Reporting Line and Environment Canada.
|
| July 19 |
Red River - Syndicate sewage pumping station |
Unknown |
6 hours and 15 minutes |
Water from fire fighting |
- Water used by firefighters to put out a fire at 65 Higgins drained into combined sewer.
- Syndicate station pumping capacity exceeded and high level alarm received about 7 a.m.
- Responding crew decided not to close gate due to basement flooding concerns.
- Around noon, crew partially closed gate and, with reducing flows, completely closed gate at 1:15 p.m., stopping discharge of diluted raw sewage to river.
- Incident reported to Manitoba Conservation, Manitoba Environmental Accident Reporting Line and Environment Canada.
|
| July 1 |
Red River - Cockburn sewage pumping station |
Unknown |
1 hour and 40 minutes |
Water main break |
- 500 mm feeder main (major distribution water main) break at Grant Ave. and Nathaniel St. caused large volume of drinking water to drain into combined sewer.
- Cockburn station pumping capacity exceeded and high level alarm received at 1:50 a.m.
- Crew arrived around 2:15 a.m. and decided not to close gate due to basement flooding concerns.
- Flow from water main break was reduced and discharge of diluted raw sewage stopped by closing gate at 3:30 a.m.
- Volume of discharge unknown but sewage flows are lowest during the night.
- Incident reported to Manitoba Conservation, Manitoba Environmental Accident Reporting Line and Environment Canada.
|
| May 3 |
Red River - Crescent Dr. to St. Vital Park river crossing pipe |
2160 litres |
9 minutes |
Joint separation |
- During routine monitoring, crew found evidence of river water entering river crossing pipe on Crescent Dr. side.
- Inflatable plug installed at 3:45 p.m. to allow for pipe to be televised.
- Pipe determined to have a separated joint.
- When plug removed around 3:59 p.m., backed up wastewater in upstream pipe surged, causing pipe to temporarily discharge from separated joint into river.
- Estimated average discharge of 4 litres per second from 3:59 p.m. to 4:08 p.m.
- River water resumed entering pipe at 4:08 p.m.
- Manitoba Conservation on site at the time of discharge. Incident reported to Manitoba Environmental Accident Reporting Line and Environment Canada.
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Last updated: January 26, 2012 |
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