The Clam Lake Canal is a man-made long canal between Lake Mitchell and Lake Cadillac in Cadillac, Michigan. It was made by George A. Mitchell, the founder of the city of Cadillac, in the 1870s. The main purpose of the man-made canal was to facilitate the movement of logs to sawmills. Mitchell was a businessman, merchant, railwayman, lumber baron, and real estate developer who needed lumber to build the village and saw the potential for further sawmill development. Sometimes called the Cadillac Canal, it is primarily used today for recreation boaters travelling between the two lakes. In 1919, the area was reorganized as Mitchell State Park; the canal itself was dedicated as a Michigan State Historic Site on March 16, 1989. The canal displayed an unusual mystery soon after it was constructed. It was frozen over in the first part of the winter when the lakes on each side of it were unfrozen. Then when the adjacent lakes froze over with thick ice this canal in-between was unfrozen and flowed freely all winter long.
Background
In 1873, George A. Mitchell paid $2,000 to purchase a strip of land between Little Clam Lake and Big Clam Lake. The strip already connected these lakes via the small Black Creek, which Mitchell envisioned as an efficient transportation route for logs once the canal was constructed. Mitchell first persuaded the Grand Rapids and Indiana Railroad to change their original route layout between the lakes to be redirected to go to the eastern end of the Little Clam Lake in the southeast corner of Wexford County, Michigan. He then formed the Clam Lake Improvement and Construction Company and developed a canal there by widening the stream. There was a construction permit taken out as was required by the state of Michigan. Mitchel widened the long connecting stream to some. The main reason for the canal's development was to be able to float logs from one lake to the other and collect fees for the usage of the waterway. The logs were taken to the railroad and sawmills for processing into lumber. The Clam Lake Canal has been widened additionally six times to about wide and is used in the present time as a recreational passage between the lakes for the local boaters.
Clam Lake Canal mystery
The Clam Lake Canal displays an unusual event most winters. It is out of the ordinary of what usually happens to canals in the Northern Hemisphere of the world in the winter time where temperatures are consistently well below the freezing point. It is such an unusual event that it has been written up in Ripley's Believe-It-Or-Not books series. The phenomenon is when the canal is frozen over in the first part of the winter, the lakes on each side are unfrozen. The canal freezes over first during the winter months, while the lakes on either end of the canal are unfrozen during a typical winter in Northern Michigan. After the lakes freeze over during the mid-winter months, the canal thaws out and flows with unfrozen water. According to Department of Natural Resources, the explanation for the canal unfrozen phenomenon concerns the physical properties of water. It starts with the fact that water is heaviest and most dense at 39 degrees Fahrenheit and lighter above and below this temperature because it is less dense. Therefore, in the early winter months, the lighter water molecules float to the top. Then as the weather gets colder the water closest to the top freezes first and turns to ice. In addition, since the canal is shallower and has less volume than the adjoining lakes it freezes quicker, and this is the reason why ice forms on Clam Lake canal before lakes Mitchell and Cadillac. As the winter advances and the temperatures drop more the lakes catch up and start the hard freezing process. The warm water of the lake under the ice is forced to leave as the ice becomes thicker on top. The warm water moves toward the canal, thawing the canal and causing the canal water current to flow. It stays open for the length of the winter. On rare occasions, when the temperature goes below zero Fahrenheit, there will be some ice formed on the shoreline of the canal.
