Plum Island (Wisconsin)
The island is a bird sanctuary under control of the United States Fish and Wildlife Service and part of the Green Bay National Wildlife Refuge since 2007, and is open to the public for recreational purposes. The island also holds the unmanned Plum Island Range Lights and now-closed Plum Island Lifesaving Station.
Border Dispute
The border between Wisconsin and Michigan was originally defined as "the most usual ship channel" into Green Bay from Lake Michigan, but commercial routes existed both to the north and south of the island, which led to a border dispute. In 1936, the U.S. Supreme Court decision Wisconsin v. Michigan found that Plum and other nearby islands were part of Wisconsin.
Climate
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Lifesaving Station and Range Lights
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/33/Plum_Island_Life_Saving_station.jpg/220px-Plum_Island_Life_Saving_station.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e6/PlumRearLight.jpg/220px-PlumRearLight.jpg)
A lighthouse was built on the island in 1848 and abandoned when it was decided to move it to nearby Pilot Island in 1858. The island was re-colonized in 1895–6, when both a lifesaving station on the northeast corner and a set of range lights on the western side were built. The lifesaving station operated from 1895 to 1991, before being moved to nearby Washington Island, while the range lights were automated in 1969 and remain an active aid to navigation.
Shipwreck
The wreck of the Grape Shot is 0.18 miles (0.29 km) northwest of the lifesaving station in 8 feet (2.4 m) of water. It sank in 1867 after being driven ashore in a gale while carrying a cargo of lumber.
Nearby islands
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/61/Plum_Island_Pilot_Island_Detroit_Island_and_Southern_Washington_Island_Wisconsin.jpg/550px-Plum_Island_Pilot_Island_Detroit_Island_and_Southern_Washington_Island_Wisconsin.jpg)