Notice of other simliar documents
Regional or Local Number: DFO-14-HCAA-01831
Notice is hereby given that pursuant to the provisions of section 74 of the Species at Risk Act other simliar documents no. DFO-14-HCAA-01831 is issued.
Activity affecting the species is incidental to the carrying out of the activity
The proposed project involves the replacement of the Argyle Street Bridge on the Grand River in Caledonia, Ontario. The existing nine-span bridge will be replaced with a five-span bridge, built adjacent to the existing bridge using piers constructed on temporary work platforms (five causeway pods) to access the existing bridge and install the temporary and permanent bridge piers. Once the new piers are constructed, the replacement bridge will be jacked up and slid over on to the piers and the causeway pods and connector bridges removed.
Start Date: 2017-05-16 End Date: 2021-12-31
Issuing Authority: Department of Fisheries and Oceans
- Species at Risk Act
- Fisheries Act
Location of Activity (province, territory or ocean):
a) Alternatives: Doing nothing would result in the bridge ultimately failing and collapsing. Closing the bridge and not replacing it would still require in-water works to remove the bridge. The road profile is too low and the crossing too long for a clear span bridge. Relocation of the bridge crossing was not feasible without significant impacts to the town of Caledonia as it runs through downtown. Water depth is too shallow to use a barge instead of installing temporary causeway pods. A continuous causeway across the river would dam the river and increase water levels and obstruct flow. A causeway with a series of culverts would have similar impacts in that culverts would not be able to convey flows during a large flow event. A causeway with a series of ‘pods’ or ‘working platforms’ linked by bridges was chosen as this design will convey flows and ensure fish movement, and have the minimum feasible footprint. b) Measures to minimize impact: Bridge footings will be embedded sub-surface and overlain with substrate to ensure habitat is maintained. Rock for the temporary causeway is sized to prevent mobilization during high flow events. Monitoring will be undertaken to confirm that mussels are able to recolonize the areas covered by the temporary working platforms. c) Effects on survival and recovery: It is expected that there will be little impact, if any, to any species at risk.
Mr. Raymond Ratynski
Regional Manager, Species at Risk Program
Freshwater Institute, Fisheries and Oceans Canada
501 University Crescent
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