Improvements to Address a 100-Year Storm Event
After severe flooding throughout various areas the Libertyville in 2017, the Village had a study prepared to address the areas hit by the flooding. As a result of that study various improvements were proposed by area to address the 100-year storm event.
Updating the Existing Storm Sewer
The improvements for this area included upsizing of over 1 mile of storm sewer to the outlet at the Des Plaines River. The sewer pipe size was 84” at the outfall. The Rockland Road storm sewer had been updated as part of the Village’s Rockland Road Reconstruction Project completed in 2019 on which Civiltech provided Phase I studies, Phase II Design Engineering, and Phase III Construction Engineering. Read more here.
Designing the Remaining Phase
Civiltech provided engineering services to complete the design for the remaining phase of the Rockland Road Corridor flood reduction program. The remaining half mile of storm sewer work was included in this project with multiple tie-ins to the Rockland Road trunk line. At the localized low points in the project, inlet capacity calculations were performed to make sure water was making it into the sewer. As the improvements are near the Des Plaines River, soil borings were evaluated to address high water table and running sand seams. Coordination of utilities was critical to avoid conflicts with the proposed sewer.
This Project Incorporates the Following:
- Designing for 100-year flood event
- Storm sewer tie-ins to the trunk line
- Inlet capacity calculations
- Evaluating and addressing high water table and running sand seams
Scope of Services
- Preparation of Contract Plans, Specifications, & Estimates
- Drainage Design
- Roadway Reconstruction
- Utility coordination
Funding
Lake County Stormwater Management Commission Grant
