Notice of Public Information Centre 3 - GBPS & WWTP - September 17, 2026

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September 17, 2026

Municipal Class Environmental Assessment Study

Gemmill’s Bay Wastewater Pumping Station and Mississippi Mills Wastewater Treatment Plant Expansion

Public Notice: Notice of Public Information Centre 3

The Municipality of Mississippi Mills (Municipality) is progressing on a Class Environmental Assessment (Class EA) study for the proposed expansion of the existing Gemmill’s Bay Wastewater Pumping Station (GBPS) and Mississippi Mills Wastewater Treatment Plant (WWTP). Both the facilities are closely related as all wastewater generated in the urban boundary of Almonte is routed through the GBPS and travels via forcemain to the WWTP. During the course of this Class EA study, review and analyses have confirmed that the GBPS and Mississippi Mills WWTP will require capacity expansions in the short-term to accommodate projected wastewater flows generated from population growth and new developments over the planning period. Alternative servicing strategies have been evaluated in detail, in conjunction with supporting studies, to determine the preliminary preferred alternatives that minimize overall impacts.

The Process

The Class EA study is being carried out in accordance with the requirements of the Municipal Class Environmental Assessment document (last amended in February 2024), which is approved under the Ontario Environmental Assessment Act. The Mississippi Mills WWTP Expansion Class EA is following the Schedule C process while the GBPS Expansion Class EA shall satisfy the requirements for a Schedule B process. The study will identify and evaluate alternative design concepts for the GBPS and Mississippi Mills WWTP. Preferred pumping and treatment design concepts will be selected to minimize technical, socio-cultural, natural environmental and economic impacts.

Public Consultation

Public consultation is an integral component of the Class EA process, and we value your input during the planning process. Three (3) in-person Public Information Centres (PICs) are being held in association with the Class EA study. The Municipality invites residents to the third PIC to learn about the preliminary preferred alternative solutions for the GBPS and the Mississippi Mills WWTP, and to provide input. Date, time, and location details for PIC #3 are presented below:

Date / Time: Wednesday, October 7, 2026 – 2 to 8 p.m.

Location: Almonte Old Town Hall (Multi-purpose room, Second floor) 14 Bridge Street, ON K0A 1A0

Notices for PICs will be published on the Municipality’s website (www.mississippimills.ca), social media, newsletter, and distributed to all individuals and agencies who express an interest in this project. If you wish to be placed on the Project Contact List to receive notices and information or to provide comments at any time during the process, you can do so by contacting:

Luke Harrington, B.Eng.
Engineering Coordinator
Development Services & Engineering
Municipality of Mississippi Mills
(613) 256-2064
lharrington@mississippimills.ca

Bradley Young, Ph.D., P.Eng.
Director, Partner
Water and Wastewater Infrastructure
CIMA+
(647) 614-2462
bradley.young@cima.ca