A grading plan sets the finished levels across your site. It shows spot elevations, contours, slopes, and how surface water leaves the property.
The plan has to work with three things at once. Your building entrances, the municipal road grades at the property line, and the drainage strategy.
Overland flow routing is the part reviewers scrutinise. The plan must show where water goes during a major storm event when the pipe system is surcharged.
On park and open space projects the plan also sets sports field crossfall and pathway grades. Accessibility slopes on pathways are held within the applicable limits.
The grading plan is reviewed and sealed by a licensed Ontario Professional Engineer where required for site plan control, subdivision registration, or municipal infrastructure submissions.
Levels and storage volumes are worked out together, so the plan is prepared alongside your Stormwater Management Report. Where new services cross the site, it is coordinated with the servicing plan so cover over the pipes actually works.
For more on grading and drainage requirements, read What Is Shown on Civil Engineering Drawings? .