In-Construction Stormwater Projects

Saylor/Swain/Vallette Stormwater Improvement Project

Status: Design-Build Construction Starting July 2020

This neighborhood area was first identified in the original 2012 Comprehensive Flooding Plan by Christopher B. Burke Engineering, LTD. (CBBEL).  Approximately 94 homes were identified as having possible overland flooding with an estimated street flooding depth up to 1.6 feet.  Options for flood reduction in this area involved either creating new large detention basin site(s) in the neighborhood or large-scale infrastructure improvements in combination with increased pumping at Salt Creek.  The large-scale infrastructure option was estimated to cost approximately $13.5 M.  The City also investigated the possibility of new detention in the neighborhood, which could reduce the project cost by almost $5 M, but the fact that this area has no available open space (schools, parks, churches, etc.) between the problem area and Salt Creek meant that residential property buyouts would be needed.

In an effort to further investigate large-scale infrastructure improvements, the City hired CBBEL to complete conceptual engineering analyzes.  Because the infrastructure improvements would require increased pumping along Salt Creek (Creek), City staff and CBBEL staff met with DuPage County stormwater officials multiple times.  Pumping more water into Salt Creek would not be allowed by the County unless mitigation would occur with the project or if the increased pumping would not raise flood elevations downstream on the Creek.  CBBEL completed the County’s requested stormwater modeling and the County reviewed the submitted information.

Additionally, in 2018, CBBEL completed a topographic survey of both McKinley Avenue and Crescent Avenue, between Swain Avenue and Sunnyside Avenue/Rex Boulevard, which would be the likely “route” of any future infrastructure improvements between the problem area and the Creek.  CBBEL staff then reviewed the survey data, defined the best and most cost-effective route, and analyzed the cost estimates. 

City staff and CBBEL staff then presented the findings to the Public Works and Buildings Committee and the City Council in 2018 and 2019.  Because of the excessive cost of the large-scale infrastructure improvements the City began to seriously consider residential property buyouts for neighborhood detention as an alternative.  Over the course of 2019 the City was able to acquire 5 properties in the neighborhood.  The City then hired CBBEL to complete engineering design. 

In 2020 the CBBEL and the City agreed to a Design-Build Construction contract that will facilitate the installation of 7.3 ac-ft of underground detention, along Crescent Avenue and also at 633-645 Swain Avenue, and associated storm piping along Saylor, Crescent, and Swain.  The $4.73 M Design-Build contract will facilitate flood-reduction benefits for the entire neighborhood. 

Construction is expected to start in July of 2020 and be completed by the end of 2020.

Comprehensive Flood Plan - Southwest Infrastructure Improvements Presentation(08.24.15)

Saylor/Swain/Vallette Flooding Area Project Update Presentation (08.12.19)

Saylor/Swain/Vallette Stormwater Improvements Project Updates