In this project for my Masters of Geomatics in Environmental Management, I examined the availability of accessible and suitable salmon spawning habitat as related to dam placement on Vancouver Island, BC. The methodology involved creating a stream network from a DEM in order to quantify criteria for salmon spawning habitat and topological analyses to identify stream-dam and stream-ocean junctions. The criteria for suitable spawning habitat used were being unobstructed by dams, at a slope of less than 20%, and of a stream order lesser or equal to 2. I used a common linear referencing system to query streams that met these criteria. I found that approximately 26% of the potential salmon spawning habitat in the Chinook Salmon Conservation Area was no longer accessible due to dam placement. While shocking, this value likely does not reflect actual conditions since suitable and functional spawning habitat depends on a multitude of other factors (including water temperature, quality, depth, surrounding land use and cover).