Stormwater Master Plan

Project Summary:

From 1987 through 2009, the City of Evanston (City) successfully implemented the Long Range Sewer Improvement Program to essentially eliminate basement backups that had previously plagued the City. Today, in the face of more intense rainfalls and an uncertain future climate, the City’s stormwater challenges are changing. In 2019, the City prepared a Stormwater Management Guide (Guide) in line with the goals of the City’s Climate Action and Resilience Plan (CARP). The Guide provides the framework for developing a resilient stormwater management system. Development of a Stormwater Master Plan is a central component of the Guide.

The goal of this project is to prepare the Stormwater Master Plan by developing a hydraulic and hydrologic model of the City’s combined, relief, and storm sewer systems.  The model of the entire system will be used to analyze and define needed system improvements under existing and future storm conditions.  It will analyze flows both within the sewers (hydraulic) and overland (hydrologic). City staff will use the results to develop a high-level stormwater capital improvement plan for future consideration.

Project Address:

Entire City

Project Manager:

Bridget Nash, P.E.
For questions, please call 847-448-4311

Current Project Phase:

Planning

Project Report:

• Memo - Evanston Level Meter Monitoring - July 23, 2025
• Stormwater Master Plan - June 2023
  • Exhibit 3.1 - Catchment Delineations
• Stormwater Management Plan - Draft
• February 2022 - Flow Monitoring Report
• May 2021 - Draft Report Outline

Public Meetings:

Stormwater Master Plan Update - May 12, 2025

• City Council Presentation

Stormwater Master Plan Update - November 16, 2022 

• Public Meeting Presentation 

Environment Board Meeting – May 13, 2021

• Stormwater Master Plan Update

Council Actions:

•  Approval of Contract Award with Hey and Associates, Inc. for Stormwater Master Plan (RFP 19-68)

  • Memo – April 27, 2020