Plum Island (Wisconsin)

Plum Island is an island in Lake Michigan in the southern part of the town of Washington in Door County, off the tip of the Door Peninsula in the U.S. state of Wisconsin.[1] The uninhabited island has a land area of 1.179 square kilometres (0.455 sq mi) or 117.87 hectares (291.3 acres). Carp Lake is located on the northwestern side. During years when Lake Michigan's water levels are high, it is a lagoon of Lake Michigan, but it gets cut off as a separate lake during low water years.[2]

Plum Island
Plum Island is located in Wisconsin
Plum Island
Plum Island
Plum Island is located in the United States
Plum Island
Plum Island
Geography
LocationDoor County, Wisconsin
Coordinates45°18′29″N 86°57′11″W
Area0.455 sq mi (1.18 km2)
Highest elevation610 ft (186 m)
Administration
United States
StateWisconsin
CountyDoor County
TownWashington Island

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.[3] and is also open to the public for recreational purposes.[4] The island also holds the unmanned Plum Island Range Lights.

History

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
Plum Island
Climate chart (explanation)
J
F
M
A
M
J
J
A
S
O
N
D
 
 
66
 
 
−4
−9
 
 
60
 
 
−8
−10
 
 
62
 
 
0
−4
 
 
112
 
 
3
0
 
 
86
 
 
9
3
 
 
77
 
 
13
10
 
 
96
 
 
18
16
 
 
73
 
 
19
16
 
 
109
 
 
17
14
 
 
119
 
 
10
7
 
 
110
 
 
6
5
 
 
66
 
 
4
1
█ Average max. and min. temperatures in °C
█ Precipitation totals in mm
Source: [5]
Imperial conversion
JFMAMJJASOND
 
 
2.6
 
 
25
16
 
 
2.4
 
 
18
14
 
 
2.4
 
 
32
25
 
 
4.4
 
 
37
32
 
 
3.4
 
 
48
37
 
 
3
 
 
55
50
 
 
3.8
 
 
64
61
 
 
2.9
 
 
66
61
 
 
4.3
 
 
63
57
 
 
4.7
 
 
50
45
 
 
4.3
 
 
43
41
 
 
2.6
 
 
39
34
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches

View on the north side of the island
View on the north side of Plum Island

Nearby islands
Plum Island is at the lower left. Pilot Island is at the lower right with Detroit Island at center-right and Washington Island in the distance.

References
  1. "Plum Island (Wisconsin)". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
  2. Flora and Vegetation of the Grand Traverse Islands (Lake Michigan), Wisconsin and Michigan by Emmet J. Judziewicz, The Michigan Botanist, Volume 40, Number 4, October 2001, page 127
  3. Warren, Joseph. "Wisconsin's newest island destination, Wisconsin Natural Resources magazine, April 2015". dnr.wi.gov. Archived from the original on 2015-05-16. Retrieved 2018-06-26. (Archived May 16, 2015)
  4. Green Bay National Wildlife Refuge Hunt, Fish & Public Use Regulations 2021-2022, USFWS (Archived February 23, 2022)
  5. "NASA EarthData Search". NASA. Retrieved 30 January 2016.
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