News

LARGE SEWER & OUTFALL CLEAN & CCTV
PROJECT NAME: CLEAN AND CCTV OF NEPEAN BAY
LOCATION: NEPEAN BAY AREA, OTTAWA, ON
OWNER: CITY OF OTTAWA.
START DATE: JANUARY 2009

This extremely complex project was tendered by the City of Ottawa, and CWW was the only bidder. The work consisted of cleaning and televising over 600m of 1800mm storm sewer and outfalls. The specific sewer, built in the mid 1950s, had never been maintained; and investigations determined that there was a large accumulation of sediment present in the storm sewer.

The outfall is located approximately 20 feet under the Ottawa River in the Nepean Bay area of the City.

CWW employed professional divers to install a 72-inch diameter plug to ensure that sediment would not enter the Ottawa River. Among a series of specialized equipment brought to bear to complete this complicated challenge, four 20,000 gallon Weir tanks were used simultaneously to separate the solid debris from the water. The clean water was then recycled and used by the flusher unit for cleaning operations. Over 200 tons of debris was removed from the sewer and transported to the Ministry of Environment-approved dump pad at our facility.

This project was completed in the dead of winter and on schedule, and before the spring melt.