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February 07, 1887 -
ONTONAGON lost to creation of GOGEBIC.
(Mich. Acts 1887, reg. sess., loc., no. 337, secs. 1, 14/pp. 23, 25)
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March 12, 1861 -
February 07, 1887
ONTONAGON lost to HOUGHTON.
(Mich. Acts 1861, reg. sess., no. 128/p. 173)
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January 17, 1853 -
March 12, 1861
ONTONAGON gained from HOUGHTON.
(Mich. Acts 1853, reg. sess., no. 3/p. 3)
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March 19, 1845 -
January 17, 1853
ONTONAGON lost Isle Royale to creation of HOUGHTON.
(Mich. Acts 1845, ann. sess., no. 48/p. 58)
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March 09, 1843 -
March 19, 1845
ONTONAGON created from CHIPPEWA, MICHILIMACKINAC (now MACKINAC), and Non-County Area 6.
(Mich. Acts 1843, ann. sess., no. 89, secs. 5, 7/pp. 202-203)
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