Diversion Pipelines Crossing the St. Mary’s River, Montana

The water flowing out of Glacier Park into the St Mary’s River is diverted at a dam just outside the park, into a canal which parallels the river for a few miles, then crosses over it in a set of pipes, just a few miles from the Canadian Border. From there it heads eastward, to irrigate fields in the USA, via the Milk River. What remains of the St. Mary River flows into Canada, and is a source for agricultural water in Alberta, before draining into Hudson Bay.