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  • All fields: 1951-05
(3 results)



Display: 20

    • Augering holes for explosives

    • History; Maintenance; Wildlife refuges; Fishes; Employees (USFWS);
    • Orlan E. Hall, maintanance man, augering hole for TNT charge to removes beaver dam to permit run of spawning grayling to ascend.
    • Work of the Service

    • History; Wildlife refuges; Maintenance; Fishes; Dams;
    • Beaver dam outside refuge boundary, before opening with TNT (dynamite) to permit run of spawning grayling to ascend - Actual preparation for removal of this dam
    • Work of the Service

    • History; Wildlife refuges; Maintenance; Fishes; Dams;
    • Beaver dam after opening with TNT to permit run of spawning grayling to ascend.

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