Sta. 0+290. The steel channel segment is approximately 3.5m deep and 6m wide, with a 1m thick rock-lined channel bottom. The rock-lined channel bottom is required to ensure a stable channel base, to stabilize the sheet piling, and to enhance fish habitat function through this reach.
e) Two bridges/culverts were needed to maintain access to lands that are located south of the new Broadway Drain – one to service the WPA lands and another to service lands owned by the City of Windsor. Due to the separation distance between the required crossing locations, it was not feasible to install a single, shared crossing.
Culvert 1: STA. 0+202 – Windsor Port Authority Access:
The WPA crossing was constructed wide enough to accommodate industrial-type traffic (i.e., large trucks, etc.). The culvert consists of a 3.0m-wide by 2.5m-high by 16m-long cast-in-place concrete box culvert with composite headwalls consisting of steel sheet piling and precast concrete blocks.
Culvert 2: STA. 0+516 – City of Windsor Access:
The City of Windsor crossing was constructed with sufficient width to accommodate standard vehicles and maintenance equipment. The culvert consists of a 3.0m-wide by 2.5m-high by 10m-long cast-in-place concrete box culvert with composite headwalls consisting of steel sheet piling and precast concrete blocks.
f) The invert of the new drain emerged into the Detroit River at an elevation below the nearshore river bottom. In order to provide proper outlet, the excavated channel was extended beyond the original water’s edge to Sta. 0-015. To mitigate the potential for the drain outlet to become fouled with shoreline sediments, a rock jetty was constructed along the projection of the south channel bank.
g) Once the new drain was excavated, all newly constructed channel banks and areas disturbed by the construction process were re-vegetated with desired ground cover seed mixes and erosion blankets at the locations depicted in the Drawings. It is intended that the north bank of the new channel be maintained substantially free of woody vegetation in order to maintain hydraulic capacity and to facilitate access for proper maintenance of the drain. The south bank has been planted with desirable native tree and shrub species, in order to promote establishment of desirable native plant communities. The benched areas were planted with aquatic species and grasses to promote the establishment of diverse water’s edge within the backwater areas. It is intended that the south bank within the benched areas will not be maintained except to remove potential flow obstructions that may fall into the drain from time to time. Obstructions only need to be removed if they encroach into the main conveyance portion of the drain. The conveyance portion of the drain is defined by a trapezoid that has a 1.5m bottom width and 3(hor.):1(vert.) side slopes.