COUNCIL REPORT. Clear Creek Drain Open Ditch Cleanout Project

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1 COUNCIL REPORT Clear Creek Drain Open Ditch Cleanout Project Report No. DD Council Date: March 21, 2017 Recommendation: BE IT RESOLVED that Council directs the Drainage Superintendent to carry out Option #1, as set out later in this report, on the Clear Creek Drain (Open Ditch Portion). All work would be pursuant to section 74 of the Drainage Act, as well as in compliance with the Fisheries Act. Purpose: The purpose of this report is to provide sufficient information so that Council can prescribe direction to staff as it relates to the open ditch cleanout of the Clear Creek Drain to allow for a better outlet for properties within the Clear Creek Drain watershed. Background Information: Since the last report to council, further onsite investigation has been conducted on the condition of the Clear Creek Drain. It has been noted that the large outlet pipe at the top end is nearly 50% blocked by frozen corn stubble and debris stuck to the grate. Regardless of which option is selected, this grate should be cleared. There is a considerable amount of fine sediment that has settled in and around this area as well, which stretches to another 305 metres (approx) of the open ditch. This sediment has become a breeding ground for cattails, dogwood, and other unwanted brush/growth. The next immediate area (from the 305 metre mark, heading downstream) has very little sediment. In fact there are many areas in this stretch which have exposed gravel substrate, meaning that the bottom of the engineered channel is still visible. At the rear of the Cattle property ( Culloden Line), there begins to be another area with built up sediment and tall grass growing in the bottom of the channel. These conditions continue, heading downstream with varying depths of sediment, for approximately 505 metres (to the large tree at the roadside). This is where the ditch starts to turn away from Ostrander Road and heads South behind the residences. The ditch for the most part, from there on, is a fairly straight channel with a few minor bends. The ditch bottom is generally down to the original engineer s specifications, likely due to the amount of gradient change, allowing the flow to increase. There is a pond at the laneway of (Vandenbrink s) that allows any sedimentation to settle without being deposited downstream. This is a nice feature to have as it does a good job at minimizing the movement of particles. Landowners report that from this point on, there are periodic blockages due to tree branches and debris/garbage particularly after storms and heavy rainfall (which have historically been removed by the landowners) are not of major concern. Otherwise, A leader in the development and delivery of municipal services for the growth and well being of our community.

2 there are no issues to report, as it appears that the drain is capable of handling the rainfall events that it was originally designed for. Considering the information given, we are left with 2 options for the maintenance of the Clear Creek Drain Open Ditch: 1. Remove the sediment (full bottom cleanout) and obstructing brush from the first 305m (approx), as well as create a sediment trap at the outlet of the upstream tiles. Observe the conditions along the route and remove any spots that have blockages or heavy sedimentation. Further full bottom cleanout from the back of the Cattle building ( Culloden Line), removing sediment, and all growth in the stream, to a point approximately 505m downstream, and ending at the large tree at the roadside. Monitor the performance of the Drain in the following year to determine whether additional work should be done. 2. Do a full bottom cleanout from the outlet of the closed tile, 4km downstream to the outlet, bringing the entire length of open ditch to the original specifications of the engineer s report. As previously stated, regardless of which option is chosen, debris should be removed from the tile outlet at the top end of the drain, and ALL guidelines given from the Conservation Authority and the Department of Fisheries and Oceans Canada shall be adhered to. Respectfully submitted by Reviewed by Jason Brunt Drainage Superintendent Mary Ellen Greb CAO Attachments - Photos A leader in the development and delivery of municipal services for the growth and well being of our community.

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