Stormwater Management Master Plan

The Town is developing a Stormwater Management Master Plan (“SWM Master Plan”) to understand the stormwater system needs through to the year 2051, and recommend solutions where needed. It will consider opportunities to improve water quality and reduce urban flooding and recommend improvements to the reliability, efficiency, and capability of the Town’s stormwater system.

Background

According to the June 2021 Census, the Town has a population of 51,400. Most residents live within the community of Stouffville. By 2051, the population will be about 103,500 residents and 28,400 jobs (2.4% growth every year). This growth increases the demand on the existing stormwater management systems.

The Town of Stouffville is approximately 220 km square and supports a diverse range of land uses. There are many environmental features through the community, including the Oak Ridges Moraine. Protection of these environmental features is important as the community grows.

Project Goals

  1. Help us understand the current performance of the stormwater network in the Town. It will also consider future stormwater needs as the community grows.
  2. Identify and rank different stormwater management solutions over the short-term and long-term. It will recommend solutions to improve existing conditions and to use in new developments.
  3. Help the Town schedule and budget for additional projects between now and 2051. It will provide cost estimates and suggest funding opportunities for these projects.

How To Get Involved

The Town of Stouffville hosted a Public Information Centre on Thursday, May 28, 2026 to discuss the Town’s Stormwater Management Master Plan. This plan is a comprehensive strategy to manage stormwater, which includes rain and melted snow that runs off streets and properties into creeks and streams, and eventually into rivers and the Great Lakes. Feedback was welcomed as the Town continued to shape this important Stormwater Management Master Plan Study.

Town staff and their consultants shared the project goals and objectives, details on the field investigations completed to date, and information on the existing conditions impacting stormwater management. Town staff and project team members sought input on the project, answered questions, and received feedback from attendees.

Contact:

Chris Denich, M.Sc., P.Eng.

Director of Water Resources
Aquafor Beech Limited
Phone: (647) 993-2267
denich.c@aquaforbeech.com 

Timeline:

Data Collection, Review, and Analysis

  • Background Data Review and Gap Analysis
  • Develop Study Purpose, Problem Statement, Goals, Objectives, and Targets
  • Policy Review and Synthesis

Assessment of the Existing and Future Conditions

  • Stormwater Management Facility Review
  • Stormwater Monitoring Program
  • Study Area Characterization Summary
  • Stormwater Model Development
  • Existing Conditions Assessment
  • Future Forecasting Scenarios

Operation and Maintenance Manual Requirements

Development and Assessment of Alternative Solutions

  • Alternatives Development
  • Development of Evaluation Criteria
  • Evaluation of Alternatives

Green Infrastructure Alternatives

  • Green Infrastructure Implementation

Financing and Implementation Plan

Communication and Stakeholder Engagement

Preparing the Draft Reports and Final Report to Council

Accessible formats available upon request. Contact 905-640-1900 or customer.service@townofws.ca for assistance.
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