Water serves a variety of purposes in placer mining operations. Primarily, it is used to separate the valuable from the gangue material. Water is also used for the following associated operations; hydraulic stripping, hydraulic elevating, hydraulic...
Title taken from verso. View of Trans-Alaska Pipeline bridge pier during bridge construction at Gulkana River in Southcentral Alaska, with construction workers at right. Also from verso: "Note styrofoam insulation to protect permafrost from thawing...
Title taken from verso. View of thawing permafrost on miners' trail to Tolovana, Alaska during Trans-Alaska Pipeline construction in Interior Alaska. Also from verso: "Left thawing permafrost. Pipeline company though NOT responsible, did do erosion...
Title taken from verso. View of different insulating materials used in attempts to inhibit thawing of permafrost during road construction and Trans-Alaska Pipeline construction near Hess Creek in Interior Alaska. Sept. 7, 1970. Photographer: Steve...
Title taken from verso. View of construction workers and bulldozer building pad for Trans-Alaska Pipeline made of styrofoam layer and gravel layer at Pump Station 1, Prudhoe Bay, Alaska. Also from verso: "Styrofoam under ly [sic] of 4 feet of...
Title taken from verso. Group of archaeologists thawing earth with heaters (possibly propane) and digging at north bridge approach to Atigun River before Trans-Alaska Pipeline construction in Northern Alaska. April 26, 1975. Photographer: Steve...
Title taken from verso. Aerial view of Washington Creek after fire near Wickersham Dome was extinguished during Trans-Alaska Pipeline construction in Interior Alaska. Also from verso: "Some thawing permafrost material flowed into Washington Creek."...
Title taken from verso. Aerial view of Haul Road (later called Dalton Highway) permafrost damage at survey station during Trans-Alaska Pipeline construction in Interior Alaska. Sept. 19, 1972. Photographer: Steve McCutcheon. Original photograph...
Title taken from front. Alaska Engineering Commission Railway's electric ice thawing machine, Anchorage, Alaska, with buildings in background. Also from front: "A.E.C. G344." An Alaska Engineering Commission photo. Photographer's number G344. 1917....
Title taken from caption. Cataloguer's note: The open-cut mining which was new at the time, was generally considered as more efficient. It involved the stripping, thawing and extracting of the gravel. The surface dirt was hauled away, in...
Title from indexer. Photograph shows a system of steam pipes thawing the permafrost on what may be the Seward Peninsula. Original size is 5.25 x 3.25 in.
Title from indexer. Photograph shows a gold field being thawed by steam pipes. It is being prepared for a gold dredge. Original size is 5.25 x 3.25 in.
Title from indexer. Photograph shows a gold dredge in the distance with men working around it, with a system of pipes in the foreground. Location may be on the Seward Peninsula. Original size is 5.25 x 3.25 in.
The collection consists of 42 photographs and brief descriptions, taken during an archaeological dig in Fairbanks. Photographs depict fossils, artifacts, rock and soil formations, gold mining operations and equipment, and landscapes. Persons...
These photographs were taken between 1899 and 1911 and depict life in the region around Forts Gibbon and Egbert. Included are hunting parties, military personnel, camp buildings, scenery, dog sledding and skiing. Steamships are shown loading wood...
Title from caption: Steam points, [showin?] means of thawing the gravel. Photograph shows steam points driven into a wall of gravel in an attempt the thaw it.
Title from accompanying notes. "Yukon River before arriving in Whitehorse, Yukon Territory. Spent night in Whitehorse." A dock and walkway on the thawing Yukon River.