Fish Park Plan and Stream Restoration

Project Details

Client

North American Development Group

Location

Halifax, Nova Scotia

Year(s)

2009

Status

Completed

Project Overview

As planner and project coordinator for Dartmouth Crossing, EDM began reclamation of the quarry lands with extensive water modeling to improve the quality of both watercourses. Approvals were required over the course of the project from more than half a dozen regulatory agencies at three levels of government.

Two watercourses flowed through the Dartmouth Crossing site, Grassy and Frenchman Brook, both of which had been impacted by previous quarry operations on the site. EDM consulted with habitat specialists to improve and create fish habitat. Sections of the brooks that had been buried in culverts were brought to the surface, or “daylighted” in a 200-foot wide corridor to restore the stream. Artificially straightened channels were adjusted to meander in a natural manner. Poorly installed or failed culverts were replaced to allow a natural stream bed to exist, and pools and riffles were established where there had been only shallow and even flows.

Trout spawning beds were installed on both watercourses: one, on Frenchman Brook with great success, and a second spawning bed is located on Grassy Brook at Fish Park. “Clean” water is collected from the roofs and nearby buildings and fed into Grassy Brook at various points. “Dirty” water from roads and culverts is fed into sedimentation ponds where it is filtered before going into the brook. Heavy storm water overflows are directed into the brook against the current so fast flowing water does not destroy the natural stream.

Fish Park is the “crown jewel” of Dartmouth Crossing. As the main public space within the development, it provides an opportunity to present solution for these waterways that is socially responsible, environmentally sensitive, and financially feasible.

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