n2c_101-0545, photo by sgowtham.

Gowtham writes that thanks to not so good winter, scorching summer and lack of rains, water level in Portage Canal (near the dredge) was observably low (without that, he probably wouldn’t have gotten this picture).

Wikipedia says that The Keweenaw Waterway:

… is a partly natural, partly manmade waterway which cuts across the Keweenaw Peninsula of Michigan. Parts of the waterway are variously known as the Keweenaw Waterway, Portage Canal, Portage Lake Canal, Portage River, Lily Pond, and Portage Lake. The waterway connects to Lake Superior at its north and south entries with sections known as Portage Lake and Torch Lake in between. The primary tributary to Portage Lake is the Sturgeon River.

Originally a small river used by natives for transportation and fishing, the waterway was dredged and extended in the 1860s in a joint venture between the United States Government and several mining corporations. The expanded canal allowed freighters to haul copper from the rich copper mines of the Keweenaw Peninsula out through Lake Superior to larger cities. It also enabled supply boats and freighters to reach the cities of Houghton and Hancock, which supplied goods to most of Michigan’s copper region. The local mines’ stamp mills dumped large quantities of stamp sand (containing traces of copper and chemical leaching agents) into the waterway, causing significant environmental damage near the sand dumps.

It’s part of the Keweenaw Water Trail.

He has many more great photos at sgowtham.net and you can also check out his Flickriver.