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March 10, 1892 -
WASHINGTON lost to IRON.
(Utah Terr. Laws 1892, 30th sess., ch. 45, p. 47)
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January 01, 1883 -
March 10, 1892
WASHINGTON gained from KANE, exchanged with IRON. Act passed 9 Mar 1882; took effect 1 Jan 1883.
(Utah Terr. Laws 1882, 25th sess., ch. 52, pp. 98-101)
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February 16, 1872 -
January 01, 1883
WASHINGTON gained all of RIO VIRGEN (Utah Territory, extinct); RIO VIRGEN eliminated.
(Utah Terr. Laws 1872, 20th sess., ch. 19, sec. 2/p. 28)
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August 01, 1869 -
February 16, 1872
WASHINGTON lost to KANE. Act passed 19 Feb 1869; took effect 1 Aug 1869.
(Utah Terr. Laws 1869, 18th sess., ch. 18/p. 17)
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February 18, 1869 -
August 01, 1869
WASHINGTON lost to creation of RIO VIRGEN (Utah Territory, extinct).
(Utah Terr. Laws 1869, 18th sess., ch. 10/p. 7)
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May 05, 1866 -
February 18, 1869
WASHINGTON lost to the state of Nevada when Nevada gained from Utah Territory.
(U.S. Stat., vol. 14, ch. 73[1866]/p. 43; Van Zandt, 158-159)
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January 10, 1866 -
May 05, 1866
WASHINGTON gained from IRON.
(Utah Terr. Acts 1865, 15th sess., ch. 146, sec. 2/p. 207)
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January 16, 1864 -
January 10, 1866
WASHINGTON lost to creation of KANE.
(Utah Terr. Laws 1863, 13th sess., pp. 18-19)
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July 14, 1862 -
January 16, 1864
WASHINGTON lost to Nevada Territory in present Nevada when Nevada Territory gained from Utah Territory.
(U.S. Stat., vol. 12, ch. 173 [1862], p. 575; Van Zandt, 158-160)
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January 17, 1862 -
July 14, 1862
WASHINGTON gained from ST. MARY'S (Utah Territory, extinct), lost to IRON.
(Utah Terr. Laws 1861, 11th sess., sec. 1/p. 46)
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February 28, 1861 -
January 17, 1862
The United States created Colorado Territory from Nebraska, New Mexico, and Utah Territories, and from the former Kansas Territory; WASHINGTON lost to Colorado Territory and was eliminated from present Colorado.
(U.S. Stat., vol. 12, ch. 59[1861]/pp. 172-177; Van Zandt, 141)
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January 18, 1861 -
February 28, 1861
WASHINGTON lost to HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct).
(Utah Terr. Laws 1861, 10th sess., p. 19)
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January 05, 1856 -
January 18, 1861
WASHINGTON gained from IRON all along its northern line when the boundary was shifted slightly from 30 degrees, 30 minutes north latitude to four miles north of Fort Harmony.
(Utah Terr. Laws 1855, 5th sess., sec. 10/p. 7)
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March 03, 1852 -
January 05, 1856
WASHINGTON created by Utah Territory from non-county area; included parts of present Utah, Colorado, and Nevada.
(Utah Terr. Laws 1851, 1st sess., sec. 13/p. 164)
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