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Early Construction At Dworshak (Engineer recruitment program) Item Info

Fifty-foot high, four decked jumbo drill rig that will be used to bore the diversion tunnel at the U.S. Army Corps of Engineers' Dworshak Dam on the North For Clearwater River. Thirty air-driven "Swedish ladder drills" will be distributed along the face of the mobile drill rig and will be advanced forward yard by yard as the tunnel bore is pushed ahead. The schedule calls for the thirty borings across the face of the tunnel to be loaded with explosives, the drill frame pulled back out of the tunnel, and the charge exploded at each change of shift. The bore will be 1,573 feet in length, with a vertical height of approximately 50 feet and a horizontal width of 40 feet.
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Title:
Early Construction At Dworshak (Engineer recruitment program)
Creator:
United States. Army. Corps of Engineers.
Date Created:
1965
Description:
Fifty-foot high, four decked jumbo drill rig that will be used to bore the diversion tunnel at the U.S. Army Corps of Engineers' Dworshak Dam on the North For Clearwater River. Thirty air-driven "Swedish ladder drills" will be distributed along the face of the mobile drill rig and will be advanced forward yard by yard as the tunnel bore is pushed ahead. The schedule calls for the thirty borings across the face of the tunnel to be loaded with explosives, the drill frame pulled back out of the tunnel, and the charge exploded at each change of shift. The bore will be 1,573 feet in length, with a vertical height of approximately 50 feet and a horizontal width of 40 feet.
Subjects:
dams in Idaho engineer recruitment program
Location:
Idaho Clearwater County Ahsahka
Latitude:
46.514471
Longitude:
-116.298662
Publisher:
University of Idaho Library Digital Initiatives, http://www.lib.uidaho.edu/digital/
Source:
Army Corps of Engineers Dam Construction photographs, 1933-1965, PG 94, University of Idaho Library Special Collections and Archives
Finding Aid:
https://archiveswest.orbiscascade.org/ark:80444/xv165618
Source Identifier:
94-0-13
Type:
Image;StillImage
Format:
image/jpeg

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Source
Preferred Citation:
"Early Construction At Dworshak (Engineer recruitment program)", Columbia River Basin Project: Dam Construction in the Pacific Northwest, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/crbp/items/crbp1230.html
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Rights:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at [libspec@uidaho.edu](mailto:libspec@uidaho.edu). The University of Idaho Library is not liable for any violations of the law by users.
Standardized Rights:
http://rightsstatements.org/vocab/InC-EDU/1.0/
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