(2019) Limestone Creek Channel Reconstruction

As part of a 4-kilometer reconstruction of Guelph Line, EcoTec oversaw the reconstruction of a highly degraded stretch of Limestone Creek. This cold-water tributary of Bronte Creek plays a critical roll in regulating the thermal regime of native brook trout (Salvelinus fontinalis) spawning grounds downstream of Derry Road. The deteriorated section of the creek had suffered heavy erosion and debris deposition from years storm surge directed by the upstream culvert, resulting in a highly braided and obstructed channel preventing upstream fish passage and offering no suitable habitat for native species. Reconstruction consisted of a newly designed 25-meter step-pool cascade complete with a low flow channel to facilitate upstream movement and limit further bank erosion. Once completed the channel was revegetated with native plant species including live staking existing banks to promote the establishment of riparian habitat.

EcoTec worked in conjunction with professional partners, Conservation Halton and the NEC to develop a detailed environmental monitoring plan, secure permits and establish onsite environmental mitigation measures to protect valuable downstream habitat and local wildlife communities. EcoTec also provided daily monitoring including incidental wildlife removals and water quality analysis over the length of the project.