TRCA’s Role in
Hydro One Networks Inc. Project Review
Standard Best Practices, Standard Compliance Requirements, and Permits Criteria
Conservation Ontario and Hydro One Networks Inc. (HONI) signed a Memorandum of Understanding (2025).
This memorandum details clearance and permitting protocols to be followed between HONI and conservation authorities when work activities are planned or undertaken on lands regulated under the Conservation Authorities Act, as well as on conservation authority-owned lands.
There are three types of project review considered under the HONI MOU process:
- Clearance of projects meeting the Standard Best Practices (SBP) in the MOU
- Permit under the Conservation Authorities Act and its regulations, in accordance with the agreed upon Standard Compliance Requirements (SCRs) in the MOU
- Permit under the Conservation Authorities Act and its regulations, following the regular permitting approach, for projects which do not meet the SBP or SCR criteria
PLEASE NOTE
Projects deemed an emergency by HONI follow Section 8.0 of the Conservation Ontario-HONI MOU. For Regular permits, the TRCA Emergency Infrastructure Works permitting process must also be followed.
View Specific Details Relating to Each Process
1. Projects Which Meet Standard Best Practices (SBP) Criteria
- Removal of beaver dam or other, similar obstructions
- Geotechnical and/or intrusive archaeological investigations, beyond the limits of wetland, watercourse, or valleys (steep slopes) – applies to lines and stations
- Individual distribution wood pole works beyond the limits of wetland, watercourse, or valleys (steep slopes) – applies to lines and stations
- Forestry maintenance activities in existing corridors or access routes, beyond the limits of wetland, watercourse, or valleys (steep slopes)
- Maintenance of existing access routes beyond the limits of wetland, watercourse, or valleys (steep slopes)
- Above-grade infrastructure works – applies to existing lines and stations
- Herbicide application
2. Projects Which Meet Standard Compliance Requirements (SCR)
- Exposure, cleaning, and coating of below-grade foundations
- All individual transmission pole works (excluding new transmission lines)
- Individual distribution pole works within the limits of wetland, watercourse, or valleys (steep slopes)
- Station below-grade works, excluding drainage/stormwater management works
- Maintenance of existing access route through the limits of wetland, watercourse, or valleys (steep slopes)
- Installation and removal of temporary access route, including temporary watercourse crossing above high-water mark and/or outside flood plain
- Geotechnical and/or intrusive archaeological investigations, within the limits of wetland, watercourse, or valleys (steep slopes) – applies to existing lines and stations
3. Projects Which Require a Permit
- Projects which have gone through an environmental assessment process
- Transmission line works requiring below-grade disturbance
- Submarine electrical works
- New or extended footprint for transmission corridor or station, including all activities such as forestry, construction, etc.
- Modification or installation of station drainage/storm water management works
- New permanent access route or watercourse/wetland crossing installation
- Repair or remediate slope instability or other erosion hazard impacting Hydro One Infrastructure
- Installation and removal of temporary watercourse crossing below high-water mark
How to Submit to TRCA:
Hydro One Networks Inc. Project Review
Instructions
These instructions are intended to complement
TRCA’s Role in Hydro One Networks Inc. Project Review.
Submit to TRCA
- All Hydro One Networks Inc. Project applications must be submitted through the TRCA Application Portal. As part of this process, applicants will be asked to confirm proponent and consultant contact details.
- If you have not yet created an account, you can learn more about the portal and follow the instructions provided HERE.
- Once you have created your account, follow the instructions to APPLY ONLINE.
- If your application is currently under review by TRCA staff, it is already available online. Once you have created your account (above), log in to the portal. You will be able to view the status of your application on your personal dashboard. Note: If you cannot see your application, reach out to your planner and they can assist.
- Required documents must be uploaded at the time of application and TRCA’s Approved Document Names and File Conventions for all TRCA Online Application submissions must be followed.
- Administrative review fee: Once your application is received, your TRCA planner will review its complexity, determine the fee, and send you an invoice.
Applications are based on type.
To apply, click on the appropriate button:
| Application Type | Includes | TRCA Online Application Link |
|---|---|---|
Standard Best Practices (SBP) Review
|
|
APPLY NOW |
| Note: If the incorrect category is selected then the project will be reclassified by your TRCA planner. | ||
Standard Compliance Requirements (SCR) Review![]() |
|
APPLY NOW |
| Note: If the incorrect category is selected then the project will be reclassified by your TRCA planner. | ||
Permits Review![]() |
|
APPLY NOW |
Emergency Works Permit![]() |
Emergency Permit, which follows prescribed TRCA Emergency Infrastructure Works Procedures | APPLY NOW |
Submission Requirements
- Include the following with your application:
- Covering letter (Required)
- Project location (Required)
- Drawings: Detailed design – including erosion and sediment control plans (Required)
- Report: Other (Optional)
- Site photos (Recommended)
- Landowner Authorization Form (If necessary)
- Covering letter (Required)
- Project location (Required)
- Drawings: Detailed design – including erosion and sediment control plans (Required)
- Report: Other (Optional)
- Site photos (Recommended)
- Landowner Authorization Form (If necessary)
- If you need extra time to prepare information, you can save your application as draft at any time in the process. When you are ready to complete the application, re-open your draft application and complete the final steps. Note that any uploaded attachments will not be saved.
- Administrative review fee: Once your application is received, your planner will review its complexity, determine the fee, and send you an invoice.
- Resubmission requirements: If TRCA advises that additional information is required, materials must be submitted online:
- The Applicant (or Lead Contact) should be responsible for managing the application.
- All resubmission materials must be uploaded at the same time.
- Once a submission is made, the system will change the application status to “awaiting review” and no additional information can be uploaded.
- Additional instructions are provided HERE.
- Additional information is available at: TRCA Application Portal: Frequently Asked Questions.
Standard Best Practices (SBP) Review
Standard Compliance Requirements (SCR) Review
Permit Applications
Receipt by TRCA
- Once the application is submitted, a TRCA planner will be assigned to your project.
- Your planner will:
- Guide you through the review process.
- Be responsible for all communications with applicants and consultants, including the coordination of meetings and site visits, and obtaining information from TRCA technical staff.
- Ensure that legislation, regulation, and policy obligations are implemented.
- Ensure technical review comments are cohesive and integrated.
- You should expect confirmation from your planner within two (2) business days of application receipt.
TRCA Application Review
- The TRCA planner will review the complexity of the application, determine the administrative review fee, and send an invoice.
- The TRCA planner will circulate the application to TRCA technical staff for review.
- The TRCA planner will work directly with the applicant to clarify submitted information and comments.
- The TRCA planner will identify if a meeting or site visit is required to clarify comments or responses:
- An agenda is required for these meetings.
- Meetings are generally held between the proponent or consultant and the TRCA planner only:
- At their discretion, the TRCA planner may also invite TRCA technical review staff to the meeting. The agenda is used by the planner to inform this decision.
- The TRCA planner will then advise the applicant if they should also bring their technical team to the meeting.
- Meetings are generally 30 minutes in length but may be extended depending on the scope of the agenda.
- Meetings generally occur between 2 and 15 business days of receipt of request, depending on the scope of the agenda.
- All meetings are generally conducted in a virtual environment.
- The TRCA planner will ensure timelines are met in accordance with prescribed standards. Application review status is tracked in real time in the TRCA Application Portal.
TRCA Response
Once the TRCA review of your SCR or SBP application is complete, TRCA will advise one of the following:
Application Status and TRCA Communications
- Application Status is visible to the registered contacts for a particular application. It can be found on the application dashboard, located on the menu bar of your homepage.
- On the dashboard, applicants will be able to see the name of the planner working on your file (“Assigned to”), all documents submitted for review, file status, fee balance and payment link, the project description, and a Client Access tab.
- All TRCA communications will be available in the Client Access tab. The client will be notified via email when there is new information available for download.
- For proponent-led meetings, depending on the scope of the agenda, it is generally only the TRCA planner who will attend.
Need More Information Before You Apply?
Click on the links below for additional information:
For All Applicants
- Government of Ontario: Permits under the Conservation Authorities Act
- How to Submit to TRCA:
- Learn More About:
- Resources for Applicants: Policies, Guidelines and Checklists
- TRCA Administrative Review Fees
- Regulation, Permits and Planning Act Review: Frequently Asked Questions
- TRCA Application Portal: Frequently Asked Questions
For Infrastructure Builders
- How to Submit to TRCA:
- Learn More About:
- Infrastructure Planning and Permits
- Who is Responsible for Infrastructure Project Review at TRCA
- Municipal Infrastructure Project Review
- Provincial and Federal Infrastructure Project Review
- Institutional, Private, and Partially Private Infrastructure Project Review
- Oil, Gas and Utility Infrastructure Project Review
- TRCA’s Service Level Agreements with Infrastructure Partners
- Permission to Enter TRCA-Owned Lands and Request for TRCA Archaeological Review
- Telecommunication Tower Project Inquiries
For additional information, see Quick Links for Infrastructure Proponents and Consultants.
If you have any questions about the Infrastructure Planning and Permitting review services, please email infrastructureplanningpermits@trca.ca.
Please note that it is the responsibility of the proponent to undertake due diligence to determine all required planning and permitting approvals.

