Map of the Portage Lake mining district : Michigan College of Mines yearbook.

Map of the copper mining region in the vicinity of Portage Lake on the Keweenaw Peninsula in Michigan. Shows incline and vertical shafts, stamp mills, and railroads.

Bibliographic Details
Uniform Title:	Senate document (United States. Congress. Senate) ; 61st Congress, 2nd session, no. 633.
Corporate Authors:	United States. Immigration Commission (1907-1910) (Cartographer) United States. Congress Senate United States. Congress. Senate. Committee on Immigration Michigan College of Mines
Language:	English
Published:	[Washington, D.C.] : [Government Printing Office], [1911]
Edition:	[United States congressional serial set edition].
Series:	Senate document (United States. Congress. Senate) ; 61st Congress, 2nd session, no. 633.
Subjects:	Copper mines and mining > Michigan > Keweenaw Peninsula > Maps. Copper mines and mining > Michigan > Portage Lake Region (Houghton County) > Maps. Keweenaw Peninsula (Mich.) > Maps. Portage Lake Region (Houghton County, Mich.) > Maps. Maps.
Genre:	Maps.
Physical Description:	1 map ; 38 x 34 cm.
Other Uniform Title:	Reports of the Immigration Commission. United States congressional serial set. 5677.
Cartographic Data:	Scale approximately 1:100,000 (W 88°47ʹ32ʺ--W 88°20ʹ07ʺ/N 47°19ʹ07ʺ--N 46°57ʹ21ʺ).
Format:	Map

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