Statistics for occurrence #1 of “Cascade county” in entry united-states-of-america-montana of Harper's Encyclopedia of United States History:
...issouri River above Great Falls is launched at Townsend......1886
Territorial legislature passes a localoption act, and provides for the observance of Arbor Day......1887
Coal-mining begun in Cascade county ......1888
Montana admitted to the Union by act of Congress......Feb. 22, 1889
Legislature passes an Australian ballot act......1889
Laying of the corner-stone of the new capitol building ...
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† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.