Columbia River Dams Map

The before and after images below give you a sense of the change. A map of the columbia river watershed with the snake river highlighted in yellow and the columbia river highlighted in blue the columbia river basin covers 258,000 square miles and includes parts of seven states and one canadian province. Small circles are 50 meters or less, medium are 50 to 150 meters and large are over 150 meters.

15 rows there are more than 60 dams in the columbia river watershed in the united states and canada. Downloadable maps (.pdf) beacon rock state park download cascade locks marine park download T he dalles dam, in the foreground, was built between 1952 and 1960.

This map shows the columbia river drainage basin and the river with dark purple line.

This map was created by a user. Two fifth of the river's course, some 500 miles (800 km) of its 1,240 miles (2,000 km) length, lies in canada, between its headwaters in british columbia and the us border. The prescient observation of the oregonian in 1933, that the river would be transformed at the hands of man, came true. Many of the dams in the columbia river watershed were not created for.