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The large rain event that occurred on June 30, 2018 did set the project back a bit, for two reasons. One the wet weather prevented work on the site for nearly a week and two the heavy water flows through the corridor did do some minor damage to work that had previously been completed, primarily in areas that has been started but not fully completed and stabilized. All in all, the vast majority of the work that was previously completed functioned as designed and withstood the tremendous amount of water without issue or damage. The City and contractor are currently working through the schedule changes this event will have on the overall project, but repair work is currently underway both east and west of Foxboro Road.
Once the repair work is completed, final soil lifts/erosion control will be installed on the area immediately around the storm sewer outlet east of Foxboro Road. Additionally, west of Foxboro Road work will continue with the installation of rip rap and check dams working west to east through the project area and an installation of a retaining wall on the western end of the channel. As this is occurring, grading activities continue to occur and will be followed by construction of soil lifts. Construction traffic in this area will continue to access this site from Hatfield Circle.
Design Engineering: December 2016-Fall 2017
Project Letting: November 2017
Construction: November 13, 2017 to September 2018
Contractor: Synergy Contracting, LLC of Bondurant, Iowa
Kyle Riley, P.E., CFM
5525 Merle Hay Road, Suite 200
Johnston, IA 50131
This drainage channel is located on outlots owned by the Green Meadows West Homeowners Association, and runs between Hadfield Circle and Heather Bow west of Foxboro Road and Heather Bow and Tiburon Circle east of Foxboro Road. The purpose of the project would be to correct erosion and to stabilize the stream banks from the outlet of the storm sewer project completed in 2010 easterly to Beaver Creek.
The Green Meadows West Central Channel Stabilization stormwater improvements are funded by the Johnston Stormwater Utility, which was implemented in July 2012 to create a dedicated funding source for projects that reduce erosion, protect properties and infrastructure from flooding and to improve water quality within the City of Johnston, for more information on the stormwater utility, visit the stormwater projects page.