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    • Mining camp, west of Eldora

    • View of the Happy Valley Placer Co. mining camp in the Grand Island Mining District, Boulder County, Colorado with tents and a buggy. John H. Kemp leans on the fence to the left; Engineer August Mathez stands with a transit instrument and tripod...
    • Happy Valley Placer Company (Colo.)--Facilities--1890-1900.; Mining camps--Colorado--Boulder County--1890-1900.; Boulder (Colo.)--1890-1900.; Mining--Colorado--Boulder County--1890-1900.; Tents--Colorado--Boulder County--1890-1900.; Kemp, John H.;...
    • Summer 1892

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