Stormwater management pond with Escarpment in the background

Town-Wide Master Drainage Plan Environmental Assessment

Please Note
If you're experiencing imminent flooding on your property, please submit a Municipal Service Request via the Town's Online Services page.

On this page:
1. Project Updates
2. Public Consultation
3. Related Documents

The Town of The Blue Mountains is undertaking a comprehensive Town-wide Drainage Master Plan following the Municipal Class Environmental Assessment Planning Process to serve as a long-term strategy for the Town to manage stormwater in existing and new growth areas. The purpose of the Drainage Master Plan is to:

Identify existing and future drainage infrastructure deficiencies and areas of flooding;
Develop drainage solutions to address these deficiencies, reduce flooding, resolve public safety concerns and improve maintenance opportunities;
Evaluate the drainage solutions through a risk assessment considering costs, impacts on the environment, and input from the public and interested stakeholders;
The selection of a set of preferred solutions to be implemented moving forward;
Prioritization of the preferred solutions considering available funding, planned development, capital works budgets, infrastructure condition assessments and coordination with other infrastructure (roads, bridges, sanitary and water main) improvement projects; and
The development of a policy framework for the management of stormwater in existing and future growth areas.

The Drainage Master Plan will be focused on the settlement areas in the Town including Lora Bay, Thornbury and Clarksburg, Camperdown, Craigleith and Swiss Meadows, the Blue Mountain Village Area and Caste Glen.

Why Now?
The Town is completing this assessment now to create a long-term strategy for the management of stormwater in existing and new-growth areas.

Project Updates

November 12, 2025 - Follow-up Staff Report

At their meeting on Tuesday, October 28, Committee of the Whole requested more information about the Drainage Master Plan EA process, risks, benefits and historical context in response to Staff Report OPS.25.003. Staff have prepared a follow-up report focused on these subjects, and are scheduled to present it to Committee on Tuesday, November 18.

View Follow-up Staff Report

View Final Report (for review)

To accompany the presentation for Public Information Centre #3, the 90% Draft Master Drainage Report is now available for public review, along with Appendices and Maps. Links to these files can be found in the Public Consultation section of this page. Members of the public can send any questions to the project team by email, or attend the in-person Q&A Session scheduled for Tuesday, October 29 at Town Hall.
View Public Consultation
Staff Report CSOPS.24.028 was presented to Committee of the Whole on Tuesday, April 30, 2024. The report requested Council approval to increase the consulting contract with Tatham Engineering by $106,000. These funds will support the calibration of a stormwater hydraulic model direction, the facilitation of a third Public Information Centre, an increase to the project contingency budget and various other miscellaneous tasks.
Committee voted 6-0 in favour of the staff recommendations. The motion is scheduled to be adopted by Council at their meeting on Monday, May 13. Discussion of the Staff Report begins at the 2:11:40 mark of the meeting recording.
View Meeting Recording

Public Consultation

Please Note: Fullscreen playback is not enabled on the Town's website. If you'd like to watch the video on fullscreen, please click the "Watch on YouTube" or the video title.
Public Engagement
Residents are asked to submit questions to the contacts included in the presentation, or to attend the in-person Question & Answer Session scheduled as follows:
In-Person Question & Answer Session
Tuesday, October 29, 2024
5:00 p.m. to 7:00 p.m.
Town Hall
32 Mill Street, Thornbury, ON
View 90% Draft Report
View Appendices
View Maps

Public Information Centre #2 - March 2023

Please Note: Fullscreen playback is not enabled on the Town's website. If you'd like to watch the video on fullscreen, please click the "Watch on YouTube" or the video title.

Public Engagement

Residents were asked to submit feedback and comments through a comment sheet, and also through virtual and in-person Question and Answer Sessions.

View Virtual Question & Answer Session Recording

Related Documents and Maps

Title	File Size
Draft Master Drainage Report - 60%	100 MB
Appendix A: Existing Conditions Report	1.2 GB
Appendix B: Background	8 MB
Appendix C: Fluvial Geomorphology Study (contact for details)	N/A
Appendix D: Natural Heritage Study	37 MB
Appendix E: Stage 1 Archaeological Assessment	17 MB
Appendix F: Future Conditions Analysis	62 MB
Appendix G: Public Information Centre 1	14 MB
Appendix H: Conceptual Design Drawings	94 MB
Appendix I: LID Design Drawings and Analytical Results	0.9 MB
Appendix J: Construction Cost Estimates	1 MB
Appendix K: Alternative Solutions Digital Model Files (contact for details)	N/A

Please Note: Fullscreen playback is not enabled on the Town's website. If you'd like to watch the video on fullscreen, please click the "Watch on YouTube" or the video title.
Public Engagement
Residents were asked to submit feedback and comments through a comment sheet, interactive survey and virtual Question and Answer Session.
View Virtual Question & Answer Session Recording
Related Maps
Detailed maps of the Minor and Major Drainage System deficiencies, as well as the Existing Floodplain Maps.
View Minor Drainage System Deficiency Maps
View Major Drainage System Deficiency Maps
View Existing Floodplain Maps

Canadian Union of Postal Workers Strike Impacts

Town-Wide Master Drainage Plan Environmental Assessment

Please Note

Why Now?

Project Updates

November 12, 2025 - Follow-up Staff Report

Public Consultation

Related Documents