Lora Bay Drainage Improvements

Council has directed Town staff to continue work with the developer and the Grey Sauble Conservation Authority to resolve existing drainage issues in the Lora Bay area. The previous Staff Report PDS.19.03 noted this work.

The drainage course running on the west side of Lora Bay Drive within the Town road allowance (commonly known as Boulder Creek) drains a total area of approximately 280 hectares.  Drainage is conveyed beneath Highway 26 by two 3.1 x 1.2 concrete box culverts and two 0.9 meter x 0.9 m concrete box culverts (~ 9.2 m2 total area).  Downstream of Highway 26, the system is conveyed through a boulder-lined channel to Westridge Drive, where it’s directed into a 0.9 by 2.2 (2.0 m2 area) concrete box culvert.  North of Westridge Drive, the system steepens before a sharp left turn to proceed through the Golf Course and then into the Stormwater Management Pond on the 2nd and 3rd holes. 

During Spring rain, snowmelt, or heavy rainfall events, flows have spilled from the channel South of Westridge Drive to wash out the Trail above and below the roundabout.  Additionally, driveway culvert washouts on Sunset Boulevard, just north of Lora Bay Drive, occurred when runoff from the Golf course channel inundated the Sunset Boulevard drainage system. Works have progressively been undertaken over previous years to improve the system.  The currently proposed works will create improvements from North of Highway 26 to the Stormwater Management Pond on the 2nd and 3rd holes to bring the Drainage System up to current standards.