Stormwater Management Requirements for Land Development Proposals

MTO Approvals

Before proceeding with the SWM report, the proponent should first determine if a SWM report needs to be submitted to MTO. SWM reports are generally required by MTO as part of the following approvals:



Determining if a SWM Report needs to be submitted to MTO

A SWM report is required with a land development proposal to support the following MTO approvals.

  1. A Public Transportation and Highway Improvement Act (PTHIA) Permit, which may be a Building and Land Use Permit or an Encroachment Permit.
    • A Building and Land Use Permit is required when a structure is to be constructed within the highway corridor control area. The control area varies depending on the type of structure (e.g. the control area for a shopping centre is 800m). To determine if a Building and Land Use Permit is required, contact the local MTO District Office.
    • An Encroachment Permit is generally required when any work is to be completed within the highway right-of-way. To determine if an Encroachment Permit is required, contact the local MTO District Office.

  2. Conditions of Approval apply to Site Plan or Draft Plan of Subdivision proposals. During the circulation process, MTO may request Conditions of Approval. Each condition must be cleared by MTO before the proposal is approved. For clarification, contact the MTO Regional Highway Planning and Design Office or the local MTO District Office.

 

To determine when a SWM report is required to support either of the above noted approvals, refer to the figures presented below.

Figure 2: Development Proposals Outside the Jurisdiction of the PTHIA


Diagram showing drainage from building and parking lot directly into receiving system upstream of the boundary of PTHIA jurisdiction

A SWM Report is required when drainage related Conditions of Approval have been requested by MTO


Figure 3: Development Proposals within the Jurisdiction of the PTHIA

Diagram showing drainage from building and parking lot directly into receiving system upstream of highway but within the boundaries of PTHIA jurisdiction

A SWM Report is required when:

  • a Building and Land Use Permit is required; and/or
  • drainage related Conditions of Approval have been requested by MTO.


Diagram showing drainage from building and parking lot indirectly into receiving system upstream of the boundaries of PTHIA jurisdiction

A SWM Report is required when:

  • a Building and Land Use Permit is required; and/or
  • an Encroachment Permit is required; and/or
  • drainage related Conditions of Approval have been requested by MTO.


Diagram showing drainage from building and parking lot directly into receiving system downstream of the boundaries of PTHIA jurisdiction

A SWM Report is required when:

  • a Building and Land Use Permit is required; and/or
  • drainage related Conditions of Approval have been requested by MTO.


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