Promoting Watershed Security in Ontario:

ecological integrity, social wellbeing, and economic vitality

Drawings of Major Upland Headwater Areas

July 22, 2024: The OHI is pleased to release drawings of South-central Ontario’s Major Upland Headwater Areas. In addition to a Key Upland Drawing, individual drawings  depict elevation within and the direction of surface water flows from the Niagara Escarpment, the...