Dredging and Middle Wharf Replacement Centerville (Trout Cove) Department of Fisheries and Oceans- Small Craft Harbour, Digby County, Nova Scotia

The proposed harbour improvements project at Centreville SCH include the removal and replacement of the middle pier wharf with a new cribwork structure, construction of a services area along the northeast side of the basin and dredging of the north basin and entrance channel. 

The new cribwork wharf being will be approximately 82 meters in length and cover an area of approximately 678m2.  The new wharf will be solid cribwork structure and placed onto 300 mm thick mattress having a bottom depth of -1.8 m. The cribwork wharf would be constructed of rock-filled blocks and spans. Each cribwork wharf block would be constructed partially on land and put in place with a crane and/or floated into place.  Once in place, each block would be filled with ballast rock and the block built up to its final elevation.   

An approach would be constructed that will connect the stem of the new wharf to the existing access road for the harbour. The new approach would be created by the placement of corestone overlain with filterstone to create a rock berm on the north side of the approach lane which would extend to meet with the existing road.  This approach will be extended along the northeast side of the basin to create an additional service area and shoreline protection which will cover a total area of approximately 241 m2

The proposed project will also involve the capital dredging of a previously un-dredged section of the Centreville harbour as well a section of the entrance channel which was last dredged in 2008. This will include both class A rock removal in the Northern section of the basin (outer basin) and class B dredging in the channel.  The proposed dredge area is 4,460 m2 located directly north of the harbour's central wharf. The area will be dredged to a grade of -1.5 meters, resulting in approximately 6,690m3 of collected material.  

The method of dredging will be determined by the successful contractor however understanding the geotechnical conditions of the site, it is assumed that drilling and blasting will be required. Work may be conducted at low tide when the harbour is dry by operating machinery directly on the harbour bottom. A temporary road may also be constructed to enable work to take place during a longer period of the tide cycle. Land-based dredging could also be carried out from an excavator working off the shoreline or marginal service area. Dredging could also occur from an excavator working off a floating barge. Material would be transferred to trucks and disposed of at federal site designed to manage dredged sediment.  Due to the coarseness of the till within the sediment at Centreville, it is not expected that suction dredging would be an option for this project. 


Disclaimer

This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.

 

Latest update

End of Public Comment Period

October 15th, 2021– The public comment period on the project is closed. Fisheries and Oceans Canada - Small Craft Harbours is considering comments received to date to inform its determination on whether carrying out of the project is likely to cause significant adverse environmental effects.

Contacts

Fisheries and Oceans Canada - Small Craft Harbours, Maritime and Gulf Region
Chyann Kirby, Regional Environmental Advisor
Gulf Fisheries Centre, 343 University Avenue
Moncton, New Brunswick E1C 9B6
Telephone: 506-866-5164
Email: chyann.kirby@dfo-mpo.gc.ca


  • Location

    • The Centreville (Trout Cove) DFO-SCH (Harbour Code #1051) is located on the Bay of Fundy in Digby County, Nova Scotia (Nova Scotia)
  • Nature of Activity

    • Ports and Harbours
  • Assessment Status

    In progress
  • Start Date

    2021-09-15
  • Proponent

    Fisheries and Oceans Canada - Small Craft Harbours (DFO-SCH)
  • Authorities

    • Fisheries and Oceans Canada
  • Assessment Type

    Project on federal lands
  • Reference Number

    82994

Nearby assessments

..within 200 kilometres
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