Stormwater management ponds function to collect runoff from nearby urban areas. Stormwater runoff typically carries large amounts of sediment and other contaminants that are then held in the ponds so they do not reach the natural environment. As sediments and other contaminants accumulate, the pond’s ability to function properly is greatly reduced.
Annual pond sediment removal is required to ensure that stormwater management ponds function properly.
Schedule
Work is scheduled to take place between July 15 and October 15.
Work Details & Locations
This maintenance work is required to reduce the potential for flooding in the surrounding areas, and to reduce the risk of sediment and other contaminants from entering Lovers Creek and the Little Lake Watershed.
Sediment Removal Process
The most efficient and cost-effective way to remove accumulated sediment from the City's stormwater management ponds is mechanical excavation after dewatering the pond. Dewatering can be done in two ways:
- Ponds constructed with a maintenance drawdown pipe can be dewatered by gravity.
- Ponds without a maintenance drawdown pipe are dewatered using a pump.
Water discharged from the dewater pipes is treated to prevent sediment discharge into the natural environment. Prior to any mechanical excavation a full wildlife survey is completed.
Wildlife Protection Works
Wildlife protection works will include relocating any fish, turtles or amphibians within the work area to nearby locations and regularly conducting bird surveys to ensure the work area did not disturbing nesting birds.
