For Residents

Lot Grading Plan - Residential

Lot Grading Plan, approved by Drainage Services, is required as part of the detailed engineering drawings for development servicing agreements, and as a surface drainage plan necessary pursuant to other requirements or regulations are to include the items of:

Legal descriptions with general legal designation for all existing and proposed lots.
Predevelopment topography with existing contours within the subdivision and extending to the adjacent lands.
Representation of the major conveyance system including all drainage flow directions, ponding areas and maximum depth of ponding anticipated for a 1 in 100 year return frequency rainfall event, and elevations of overflow points.
Surface slopes of roadways and other surfaces with flow direction arrows.
Property boundary elevations including proposed or existing elevations, and design elevations at all lot corners.
Lot drainage pattern for each lot indicating whether split drainage or through drainage is contemplated.
Lot grading details with detail diagrams of the various types of lot grading arrangements.
Roof drain provisions include all proposals of roof drain connections and surface discharge of roof drains.
Foundation drainage details.
Swale details.
Provisions for properties abutting stormwater management facilities.
Easements and/or restrictive covenants related to drainage provisions and development restrictions.

The example drawing provides general information of the Lot Grading Plan (for reference only).