Final Dam Decommissioning Plan

The final Coats Marsh Dam Decommissioning Plan is complete and has been submitted and approved by Province. The final dam decommissioning design includes several key elements:

• Complete removal of the existing concrete weir structure;
• Placement of fill material to the west of the existing berm;
• Removal of accumulated sediment near the weir;
• Construction of a 1.2 m high concrete grade control structure at the marsh outlet. The structure does not enable storage or diversion of water within the marsh and is not considered a dam;
• Widening a portion of the outlet channel to mitigate beaver activity and improve flood conveyance capacity in the event of an upstream beaver dam failure.

Construction will occur in the late summer/early fall, with instream works being carried out during the least risk timing window of August 15 to September 15.

The final plan can be found in the Documents tab of this page.