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Until Election Day
on October 24

Reports on untreated sewage

As requested by the Province of Manitoba, we report on the incidents of untreated sewer release into the environment as a result of a disruption to our wastewater collection system. These events are usually the result of something unanticipated like a water main break or a power outage. When sewer operations are disrupted, the sewage can be released into the environment, which helps protect public health and prevent property damage like basement flooding.

2018

Date Location Estimated
amount
Estimated
duration
Cause
Jul. 3 Ravelston stormwater retention basin located at the southwest corner of Transcona Boulevard and Bradley Street 0.005 ML Unknown Blocked sewer
Incident details and response
  • On Tuesday, July 3, 2018 at approximately 12:15 PM, we received a call from one of our sewer renewal project inspectors. They found wastewater from a 250 mm wastewater sewer was trickling into a 750 mm land drainage sewer via a high level cross connection at Brewster Street and Regent Avenue West.
  • A crew attended the site at 1:10 PM and found a large accumulation of rags in the wastewater sewer at Brewster Street and Yale Avenue West. These rags caused wastewater to back up into the cross connection and enter the land drainage sewer.
  • A vacuum cleaning unit cleared the blockage in the wastewater sewer at 1:55 PM and the discharge was stopped by 2 PM.
  • The Ravelston storm retention basin collects stormwater from the surrounding area and, at a pre-determined elevation, pumps are activated to discharge the stormwater into the 2900 mm Kildare Avenue storm relief trunk sewer.
  • The stormwater then enters the floodway east of Provincial Highway 101 and Kildare Avenue East.
  • The volume of wastewater discharged to the environment as a result of the blockage is estimated to be 0.005ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Tuesday, July 3, 2018.
Jun. 25 2300 mm Tylehurst Combined Sewer Outfall located at 499 Tylehurst Street 0.15 ML Approx. 1 hour Power failure
Incident details and response
  • On Monday, June 25, 2018, at approximately 10:52 AM, a power failure occurred at the Tylehurst Wastewater Pumping Station.
  • The SCADA operator called maintenance crews to attend the station and, upon arrival, a crew closed the outfall slide gate and stopped the overflow at 11:40 AM.
  • A mobile backup generator was connected and restored power to the pumps by 12:08 PM.
  • Manitoba Hydro restored main line power to the station at 2:30 PM and the outfall slide gate was opened at 3:15 PM.
  • The amount of wastewater discharged is estimated to be 0.15 ML.
  • The incident was reported to Manitoba Conservation Accident Reporting line on Monday, June 25, 2018.
Jun. 22 1200 mm Woodhaven Combined Sewer Outfall located at 2782 Assiniboine Avenue 0.02 ML Approx. 3 hours Power failure
Incident details and response
  • On Friday, June 22, 2018 at approximately 4:36 PM, our McPhillips Control Centre received a pump fail alarm from the Woodhaven Wastewater Pumping Station.
  • A maintenance crew was dispatched and arrived at the Woodhaven station at 5 PM.
  • Upon arrival, the crew determined that the pumps were not operating due to a partial loss of power where one phase of the three phase power supply was out.
  • The crew went to retrieve the mobile generator and called in an electrician to meet them onsite to connect it to the station.
  • They returned to the site just as Manitoba Hydro restored power to the station.
  • At 8:04 PM, the station was back on line and the overflow stopped at 8:07 PM.
  • A review of our SCADA instrumentation indicates that a discharge from the Woodhaven outfall occurred between 4:47 PM and 8:07 PM.
  • The total amount of wastewater discharged to the Assiniboine River is estimated to be approximately 0.02 ML.
  • The incident was reported to Manitoba Conservation Accident Reporting line on Friday, June 22, 2018.
Jun. 14 2850 mm Aubrey Combined Sewer Outfall located at 1016 Palmerston Avenue 2.40 ML Approx. 4 hours Power failure
Incident details and response
  • On Thursday, June 14, 2018 at 11:43 PM, our SCADA operator at the McPhillips Control Centre received an alarm at the Aubrey Lift Station indicating that a loss of power had occurred.
  • Standby crews and a mobile generator were dispatched immediately and one station pump was operating by 1:30 AM, Friday, June 15.
  • Manitoba Hydro restored power at 3:30 AM and the station returned to normal operation.
  • In addition to the power failure, a rainfall event was occurring which resulted in a combined sewer overflow discharge to the Assiniboine River from approximately 9 PM, Thursday to 4:50 AM, Friday.
  • The total amount of wastewater discharged to the Assiniboine River, which can be attributed to the power failure only and not as a result of the wet weather event, is approximately 2.40 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Friday, June 15, 2018.
Jun. 3 3480 mm Ash Street Combined Sewer Outfall located at 1059 Wellington Crescent 1.50 ML Approx. 2 hours Power failure
Incident details and response
  • On Sunday, June 3, at approximately 2:10 AM, our SCADA operator received an alarm at the Ash Wastewater Lift Station due to a power failure.
  • Standby maintenance crews along with a mobile generator were immediately dispatched to the station.
  • The mobile generator was connected and the discharge to the Assiniboine River stopped at approximately 4:30 AM.
  • Power to the station was restored by Manitoba Hydro at 6 AM.
  • The slide gate was not operated to stop the flow to the river.
  • Rain events were occurring at the time the crews arrived and it was decided that the risk to basement flooding was too high.
  • The total volume of wastewater discharged to the Assiniboine River is estimated to be 1.50 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting Line on Sunday, June 3, 2018.
Apr. 28 1500 mm Land Drainage Outfall located at Rice Road and Kilkenny Drive 0.97 ML Approx. 72 hours Buildup of grease and sewage
Incident details and response
  • On Saturday, April 28, 2018 at approximately 12 PM, a maintenance crew performing flood related inspections of gated overflow points in the wastewater sewer system found that the wastewater sewer at Kilkenny Drive and Rice Road was discharging into the land drainage sewer outfall.
  • The crew followed the sewer west on Rice Road and at 2:30 PM, the crew located the overflow.
  • They determined it was caused by a blockage in the wastewater sewer located at Rice Road and Emory Road.
  • A vacuum cleaning unit was called in to clear the blockage and the overflow stopped at 6 PM.
  • The crew continued to clean the sewer until 9 PM to restore it to normal operation.
  • The cause of the blockage was reported to be a buildup of grease and "heavy sewage".
  • We will obtain a CCTV inspection of this sewer to determine whether future preventative maintenance or repairs are required.
  • After reviewing our inspection records, we estimate that the overflow started sometime on Wednesday, April 25.
  • The total volume of wastewater discharged is estimated to be 0.97 ML.
  • The incident was reported to Manitoba Sustainable Development on Saturday, April 28, 2018 at approximately 5:10 PM.
Apr. 3 2700 mm McDermot Storm Relief Sewer Outfall located at McDermot Avenue and Red River 0.60 ML 2 days Blocked sewer and pump failure
Incident details and response
  • On Tuesday, April 3, 2018 at approximately 2 PM, our crews discovered a wastewater discharge occurring from the McDermot outfall, while conducting our weekly maintenance outfall checks.
  • The crew manually activated the dewatering pump in storm relief gate chamber to contain flow by pumping into the combined sewer and the discharge to the river was stopped by 2:30 PM.
  • We inspected upstream locations to determine the source of the wastewater.
  • Crews found a developing wastewater overflow to the storm relief sewer at 907 William Avenue, which they believed was caused by a combination of a blocked wastewater sewer and a local water main break.
  • A vacuum cleaning unit was immediately called in to clear the blockage.
  • We are currently investigating why the dewatering pump did not operate automatically and why it had to be manually turned on to divert the wastewater flowing in the storm relief sewer back into the combined system.
  • We will also be inspecting the wastewater sewer where the blockage occurred to determine the cause of the blockage and what further remedial actions may be required.
  • The total volume of wastewater discharged is estimated to be 0.60 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Tuesday, April 3, 2018.
Mar. 28 1600 mm Mager Drive Combined Sewer Outfall located at 3 Mager Drive 3.16 ML Approx. 3 hours (2 separate events) Power failure
Incident details and response
  • On Wednesday, March 28, 2018 at approximately 4:49 AM, the SCADA operator at our McPhillips Control Centre received a power fail alarm from the Mager Drive Wastewater Pump Station.
  • Standby maintenance crews and a mobile generator were dispatched however, while enroute, the alarm cleared and power was restored to the station.
  • The crews were then diverted from Mager Drive Station to another station experiencing power issues at 5:55 AM.
  • At approximately 7:26 AM, the SCADA operator at our McPhillips Control Centre received a second power fail alarm from the Mager Drive Wastewater Pump Station.
  • Standby maintenance crews and a mobile generator were dispatched again.
  • A crew arrived at 8:30 AM and observed that an overflow was occurring.
  • They began to close the outfall slide gate to store wastewater until the mobile generator could be connected.
  • At 9:12 AM, mainline power was restored before the mobile generator could be connected to the station and before the overflow could be contained by the slide gate.
  • The overflow stopped at 9:32 AM.
  • At the time of the first power failure, other stations in the area were experiencing combined sewer overflows due to what is believed to have been a rain event starting at approximately 4 AM.
  • This rain event would have contributed to the overflow volumes reported below.
  • The total volume of wastewater discharged to the Red River for both power failures at the Mager Drive Combined Sewer Outfall is estimated to be 3.16 ML. This amount is reflective of the large size of the station and by a concurrent rain event.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Wednesday, March 28, 2018.
Mar. 26 1800 mm Land Drainage Outfall located along Riviera Avenue 0.64 ML per day Unknown Incorrect sewer connection
Incident details and response
  • On Monday, March 26, 2018, at approximately 9:46 AM, a contractor performing a video inspection of the land drainage sewer, informed the City that they noticed a solid-like substance in the land drainage sewer.
  • The contractor provided the video to City personnel by 12 PM, and it was determined that there was likely a private wastewater sewer service incorrectly connected to the land drainage sewer.
  • The City then asked the contractor to perform further video inspection to determine the source of the wastewater.
  • Based on this inspection, it was determined that a private industrial wastewater sewer service was incorrectly connected to the land drainage sewer.
  • Following the discovery of the wastewater connection to the land drainage sewer, the City’s Industrial Waste Services Branch was contacted and, at roughly 4 PM, they informed the owner of the private industrial wastewater sewer service of the issue.
  • The customer ceased discharging wastewater at approximately 4:30 PM and made alternate arrangements for wastewater hauling.
  • The customer has been instructed to make a proper connection to the wastewater sewer and, in the meantime, they are being provided a Temporary Discharge Permit to run a hose to the wastewater sewer.
  • The wastewater sewer that the customer will be connecting to has been inspected and cleaned.
  • The land drainage sewer is in the process of being inspected and cleaned.
  • The duration of the discharge is unknown at this time, however, the flow rate of wastewater into the land drainage sewer is estimated to be 0.64 ML per day (MLD).
  • The incident was reported to Manitoba Sustainable Development on Monday March 26, 2018 at approximately 4:50 PM.
Mar. 24 2400 mm Lindsay Storm Relief Sewer Outfall located in Sir John Franklin Park East near Wellington Crescent at Lindsay Street 0.01 ML per day Approx. 2 hours Partially blocked combined sewer
Incident details and response
  • On Saturday, March 24, 2018 at 2 PM, a crew performing planned inspections of overflow points into the Lindsay Storm Relief Sewer (SRS) encountered a partially blocked combined sewer on Borebank Street north of Kingsway.
  • The blockage caused wastewater to accumulate and overflow into the Kingsway SRS which flows west to the Lindsay SRS, then north to the Assiniboine River.
  • A vacuum cleaning unit was dispatched, the sewer was cleaned and the overflow had stopped by 4 PM.
  • Under normal operation, wastewater flows from the Borebank Street combined sewer to the Ash pumping station and eventually to the North End Sewage Treatment Plant.
  • Wet weather flow during rain events is allowed to overflow into the Lindsay SRS and eventually to the Assiniboine River.
  • In this case, wastewater generated on Borebank Street between Grosvenor Avenue and Kingsway (one block) was directed to the Lindsay SRS and subsequently was discharged to the river.
  • The inspection crew concluded that the overflow weir at this location was not high enough to prevent dry weather overflows caused by the usual accumulation of debris in wastewater sewers.
  • On Sunday, March 25, 2018 the weir was raised approximately 150mm using hydraulic cement and bricks.
  • The flow into the Lindsay SRS at the time of discovery is estimated to be 0.01 ML per day (MLD).
  • The incident was reported to Manitoba Sustainable Development - Accident Reporting Line on Saturday, March 24, 2018.
Mar. 22 2300 mm Tylehurst Combined Sewer Outfall located at 499 Tylehurst Street 0.072 ML Approx. 45 minutes Pump failure
Incident details and response
  • On Thursday, March 22, 2018 at approximately 2:17 PM our SCADA operator received an overflow alarm at the Tylehurst Wastewater Pumping Station.
  • A standby crew arrived at the station at 3 PM to investigate the cause of the alarm. It was determined that only one pump was in operation so an electrical and instrumentation (E&I) crew were called to investigate. In the meantime, workers onsite proceeded to manually start the remaining pumps to lower the level in the wet well.
  • The station returned to normal operation by 3:25 PM and the E&I crew did not observe any issues on their preliminary visit. Upon further investigation during a second visit on March 23, 2018, they found a level sensor that needed replacement.
  • The overflow from the Tylehurst outfall is believed to have occurred between 2:37 PM and 3:25 PM and released an estimated 0.072ML of wastewater was discharged to the Assiniboine River.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Thursday March 22, 2018.
Mar. 8 Aubrey Storm Relief Sewer Outfall located at 1020 Palmerston Avenue Unknown Unknown Snow melt and water main break
Incident details and response
  • On Wednesday, March 7, 2018 at 11:30 AM, an employee performing an inspection of Aubrey Lift Station observed open water on the Assiniboine River. At the time of the inspection, however, there was no flow from the outfall.
  • A maintenance crew was called out to investigate the cause of the open water.
  • Due to the characteristics of the overflow, it is believed to have been caused by a combination of snow melt and a water main break which occurred on Saturday, March 3, 2018 near the intersection of Wolseley Avenue and Dominion Street.
  • The volume of the overflow is unknown.
  • The incident was reported to Manitoba Conservation Accident Reporting line on Thursday, March 8, 2018.
Mar. 4 1200 mm Woodlands Land Drainage Sewer Outfall located adjacent to 3011 Portage Avenue 0.04 ML Approx. 1.5 hours Blockage due to grease buildup
Incident details and response
  • On Sunday, March 4, 2018 at approximately 9:30 AM, a crew was performing preventative maintenance of the gate controlling overflows, from the wastewater sewer on Portage Avenue to the land drainage sewer on Woodlands Crescent.
  • Upon arrival they noticed that the 250 mm Portage Avenue wastewater sewer was backed up and overflowing into the Woodlands Crescent land drainage sewer.
  • The blockage was located and a vacuum cleaning unit arrived on site at 10:15 AM, the blockage was liberated and the overflow stopped by 11:00 AM.
  • The cause of the blockage was reported to be "grease".
  • We will monitor this location and add this location to our preventative maintenance program.
  • The amount and duration of wastewater discharged to Sturgeon Creek from the time it was discovered until the blockage was cleared is 0.04 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Sunday, March 4, 2018.
Mar. 3 3480 mm Ash Street Combined Sewer Outfall located at 1059 Wellington Crescent 0.35 ML Approx. 1 hour Power failure
Incident details and response
  • On Saturday, March 3, at 3:05 PM our SCADA operator received an alarm at the Ash Wastewater Lift Station due to a power failure.
  • Standby maintenance, electrical and instrumentation crews, along with a mobile generator were dispatched to the station.
  • An overflow alarm was received by SCADA at 3:30 PM.
  • The crews arrived on site and began to close the outfall slide gate and investigate the cause of the power failure at 3:49 PM.
  • The power to the station was restored at 4:12 PM and by 4:15 PM the overflow to the Assiniboine had stopped.
  • The power failure is believed to have been caused by the 600V main breaker tripping inside the station.
  • The breaker was possibly tripped by an issue with one of the three station pumps.
  • As a result, the pump has been taken out of rotation as a precaution while the cause of the failure is fully determined and repaired.
  • The total volume of wastewater discharged to the Assiniboine River is estimated to be 0.35 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting Line on Saturday, March 3, 2018.
Feb. 22 1675 mm Cockburn Combined Sewer Outfall located at 905 Cockburn Street 0.12 ML Approx. 4 hours Slide gate failure
Incident details and response
  • On the evening of Wednesday, February 21, 2018 various Wastewater Services Maintenance Crews began a planned shutdown of the Cockburn Pumping Station to replace a leaking valve on the station discharge pipe.
  • To perform this work, it was planned that the station flows would be backed up in the system to a location on Rosedale Avenue where a submersible pump would intercept the station flows and would discharge downstream of the station.
  • As a safeguard, the slide gate on the outfall pipe was also closed in order to store any flows in the system should the by-pass pump fail.
  • In addition, a vacuum cleaning unit was staged on site to assist the pump in diverting the station flow should it be required.
  • The station pumps where locked out at approximately 11:00 PM on Wednesday evening and work immediately began to remove the valve and fourteen feet of discharge pipe.
  • At 12:05 AM Thursday morning, despite all planned efforts to contain the flow, wastewater began to overflow the weir at the outfall.
  • The level of wastewater in the system did not reach the required level for the pump at Rosedale to be able to divert flows around the station as was expected.
  • Furthermore, it was observed that the closed slide gate was not containing the flow and wastewater began to discharge to the Red River.
  • As the work had already begun on the valve replacement, the station could not be put back in operation.
  • The overflow continued until 4:05 AM Thursday morning when the valve replacement work was completed and the station pumps were put back in operation.
  • We will be inspecting the slide gate today to determine the cause of its failure to contain the discharge and whether repairs are required.
  • The total volume of wastewater discharged to the Red River is estimated to be 0.12 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Thursday, February 22, 2018.
Feb. 15 2100 mm Hawthorne Combined Sewer Outfall located at 1178A Kildonan Drive 0.05 ML Approx. 1 hour Water main break
Incident details and response
  • On Thursday, February 15, 2018 at approximately 1:46 AM, the SCADA operator at McPhillips Control Centre received a high wet well and overflow alarm from the Hawthorne Wastewater Pump Station.
  • A standby crew arrived at the station and had the positive gate closed by 2:10 AM, stopping the overflow.
  • However, levels in the sewer reached a critical point (where basement flooding was a risk) shortly thereafter, and the crew opened the positive gate at 2:20 AM to relieve the system.
  • The crew subsequently closed the positive gate by 2:45 AM, stopping the controlled overflow, and the overflow alarm cleared at approximately 3:10 AM.
  • The overflow is believed to have been caused by a water main break, which occurred at the intersection of Edison Avenue and Broad Bay.
  • The flow from the water main break entered the combined sewer system and subsequently overwhelmed the pumps at the Hawthorne station.
  • It is estimated that the overflow due to the water main break was approximately between the hours of 1:46 AM and 2:10 AM, and 2:20 AM and 2:45 AM, on Thursday, February 15, 2018.
  • The total volume of wastewater discharged to the Red River is estimated to be 0.05 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Thursday, February 15, 2018.
Feb. 14 Manhole located in front of 1389 Waller Avenue 0.022 ML Unknown Unknown
Incident details and response
  • On Wednesday, February 14, 2018 at 2:06 PM, 311 received a report that wastewater was coming out of a manhole located at 1389 Waller Avenue.
  • A crew attended the site at 6:00 PM and confirmed wastewater was trickling out of a wastewater sewer manhole and flowing into the adjacent land drainage catch basin.
  • A vacuum cleaning unit arrived on site and the wastewater sewer was cleared by approximately 6:00 AM Thursday morning.
  • The volume of wastewater discharged to the environment as a result of the blockage is estimated to be 22 cubic metres or 0.022 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Thursday, February 15, 2018.
Feb. 14 1980 mm Canora Storm Relief Sewer Outfall located at Canora Street and Assiniboine River 2.8 ML Approx. 18 hours Water main leak
Incident details and response
  • On Wednesday, February 14, 2018 at approximately 3:26 PM, a report was received that "a dark colored discharge was coming from a sewer pipe or culvert at the edge of the riverbank near Canora Green".
  • At approximately 4:15 PM, a crew arrived at this location and started to investigate and discovered that the discharge was clear in colour and appeared to be caused by a water main leak upstream in the system.
  • The crew immediately contacted the Water Services Division, and both Water Services and Wastewater Services staff worked to locate the leak in the water distribution system.
  • At 10:40 PM, a potential leak was identified at Palmerston Avenue and Aubrey Street.
  • The water main was then shut down, however, flow continued at the storm relief sewer at Canora Street.
  • Crews continued to work through the night to locate the source and, by 9:45 am on February 15, 2018, the flow at the outfall stopped.
  • The source of the water has not yet been determined, therefore, crews will continue to monitor the outfall for flow throughout the day and into late next week.
  • The total volume of wastewater discharged to the Assiniboine River from the time it was reported until the time the flow stopped was approximately 2.8 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Wednesday, February 14, 2018.
Feb. 5 1800 mm Ferry Road Combined Sewer Outfall located at 40 Ferry Road 1.80 ML Approx. 3 hours Firefighting
Incident details and response
  • On Monday, February 5, 2018 at approximately 7:45 PM, the SCADA operator at our McPhillips Control Centre received an "overflow" alarm from the Ferry Road Wastewater Pump Station.
  • A standby maintenance crew was dispatched to investigate and arrived at the station at 8:30 PM.
  • The crew observed that an overflow was occurring and attempted to close the outfall slide gate but a layer of ice would not allow the gate to completely close.
  • The crew continued to attempt to close the gate using steam to clear the ice however by 10:50 PM the flow to the river appeared to have stopped.
  • The overflow is believed to have been caused by a large amount of water that entered into the system as a result of firefighting efforts on a significant fire which was located on Roseberry Street, south of Ellice Avenue.
  • The total volume of wastewater discharged to the Assiniboine River is estimated to be 1.80 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Monday, February 5, 2018.
Jan. 22 1400 mm Despins Combined Sewer Outfall located at 455 Tache Avenue 0.30 ML Unknown Water main break
Incident details and response
  • On Monday, January 22, 2018 at approximately 1:26 PM, the SCADA operator at our McPhillips Control Centre received a "Seal Water Loss" alarm from the Despins Flood Pump Station, which is adjacent to the wastewater pumping station.
  • A maintenance crew was dispatched to investigate and arrived at the station at 1:35 PM.
  • The crew ascertained that a large water main break had occurred at the intersection of Rue Despins and Tache Avenue and was overwhelming the Despins Wastewater Pumping Station.
  • They immediately proceeded to close the combined sewer outfall slide gate in order to prevent wastewater from overflowing the diversion weir and discharging to the river.
  • The slide gate was closed at 2 PM however at 3:15 PM levels in the sewer had reached a point where flooding of basements was a concern and the maintenance crew opened the slide gate to relieve the system.
  • Subsequently the water main break was controlled and levels in the sewer subsided enough to close the slide gate again at 3:45 PM.
  • The total volume of wastewater discharged to the Red River is estimated to be 0.30 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Monday, January 22, 2018.
Jan. 12 2400 mm Burrows Storm Relief Sewer Outfall located at Burrows Avenue and Red River 0.16 ML Unknown Buildup of grease
Incident details and response
  • On Friday, January 12, 2018, at approximately 10:12 AM, we received a report that "sewage was leaking into the Red River at Burrows Avenue".
  • At approximately 11 AM, multiple crews started to investigate the source of the discharge and at 3:25 PM, discovered a partial blockage in the combined sewer.
  • This blockage subsequently caused an overflow into the storm relief sewer at Main Street just south of Aberdeen Avenue.
  • A vacuum cleaning unit was called in to clear the blockage and the overflow was stopped by approximately 10:05 PM.
  • The overflow was caused by a buildup of grease in the combined sewer.
  • The total volume of wastewater discharged to the Red River from the time it was reported until the blockage was cleared is estimated to be 0.16 ML.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Friday, January 12, 2018.
Jan. 10 2100 mm Hawthorne Combined Sewer Outfall located at 1178A Kildonan Drive 0.16 ML Approx. 1 hour Water main break
Incident details and response
  • On Wednesday, January 10, 2018 at approximately 11:56 PM, the SCADA operator at our McPhillips Control Centre received a high wet-well alarm from the Hawthorne Wastewater Pump Station, and ten minutes later at 12:06 AM on Thursday, January 11, 2018 received a weir overflow alarm.
  • A standby crew arrived at the station and had the positive gate closed by 1 AM, stopping the overflow.
  • The overflow alarm cleared at approximately 1:16 AM.
  • The overflow is believed to have been caused by a water main break, which occurred at the intersection of Edison Avenue and Macaulay Crescent.
  • The flow from the water main break entered the combined sewer system and subsequently overwhelmed the pumps at the Hawthorne station.
  • It is estimated that the overflow discharged 0.16ML of wastewater to the Red River between the hours of 12:06 AM and 1 AM, Thursday, January 11, 2018.
  • The incident was reported to Manitoba Sustainable Development Accident Reporting line on Thursday, January 11, 2018.
Last updated: July 5, 2018