High Water Table

(1)  Where a foundation bears on gravel, sand or silt, and the water table is within a distance below the bearing surface equal to the width of the foundation, the allowable bearing pressure shall be 50% of that determined in Article 9.4.4.1.

Article 9.4.4.3 Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.