Beaver Creek Bank Stabilization
Beaver Creek Bank Stabilization Adjacent to the Augustine Subdivision
Preliminary Construction Plan
Click to view the plans (PDF)
Click to view (PDF)
$400,000 covering engineering and construction
Public Meeting to Learn More About the Project
When: Tuesday, August 8, 2017
Time: 6:30-7:30 p.m.
Where: City Hall, 6221 Merle Hay Road, Johnston, IA
Click here to view the letter to neighbors (PDF) about the meeting.
ScheduleDesign Engineering February – September 2017
Project Bidding – September 2017
Construction – October 2017 to June 2018
Joshua C. DeBower, P.E.
Foth Infrastructure & Environment, LLC
8191 Birchwood Court, Suite L
Johnston, IA 50131
Email Joshua DeBower
City Staff Project Contact
David Wilwerding, AICP
Community Development Director
City of Johnston
Email David Wilwerding
In 2010 the City of Johnston completed a Watershed Assessment and Stormwater Management and Action Plan for the entire community. This plan identified 10 priority projects that were needed to address erosion, protect public and private property and improve water quality. One of these projects identified was the Beaver Creek Bank Stabilization adjacent to the Augustine subdivision. Severe bank erosion exists along the northern edge of the Augustine subdivision on the west bank of Beaver Creek. The height of the bank is over 20 feet and this area has seen active erosion since the flooding of 2008.
The project involves the armament of an existing storm sewer outlet to correct erosion and the installation of a Longitudinal Peak Stone Tow Protection (LPSTP) with stone tie backs. This method has already been used in another area along Beaver Creek successfully and is intended to stabilize the banks at the normal flow elevations and allows for the banks to rebuild themselves over time as the area behind the LPSTP will fill with silt deposited during high water events. This method avoids the need to use excessive amount of rip rap armament up the entire embankment.
The Beaver Creek Bank Stabilization project is 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.