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The purpose of lot grading is to provide control of stormwater runoff with slope down and away from buildings on private property in a manner that eliminates impact on abutting properties and City right-of-ways. The Drainage Bylaw and approved Grading Plans also require inspection and approval by the City Manager on all new developments.
Along with an application for a Development Permit for any land zoned Commercial, Industrial, Multi-Family, Apartment, or Row Housing, the developer must submit a proposed Lot Grading Plan for review and approval.
The Lot Grading Plan must be approved by the City Manager prior to the construction of any buildings, additions to buildings, or alterations of surface drainage. This plan specifies design elevations, surface gradients, swale locations, and a relationship between adjacent properties; its approval is an effective basis for the control of surface drainage.
The Commercial Lot Grading Guidelines provide the procedures and requirements for surface drainage.