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1451 - 1475 of 2123 Items << < 54 55 56 57 58 59 60 61 62 63 > >>
1451 - 1475 of 2123 Items << < 54 55 56 57 58 59 60 61 62 63 > >>
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Sandblast nozzles. From top to bottom: standard nozzle before use; Pangborn nozzle after 1,000 hours and standard nozzle after 2-1/2 hours.
2024-11-22
2024-11-22 |
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Large, metal funnels in position for a concrete pour at the left power house control bay walls. The funnels and their respective downspouts convey the concrete into narrow areas between wall forms.
1939-05-24
2024-11-22 |
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Screening and washing plant at Brett pit. Trommel secondary screens in building below raw stock pile; next is balancing pile from which two conveyors lead to top of screening and washing plant. The two clarifiers, with the capacity of 3-1/2...
1937-09-10
2024-11-22 |
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Conveyor feeders removing overburden on the east side. Two grizzlies near left edge of picture.
1937-03-12
2024-11-22 |
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Enclosure, looking northeast from west shore. 262,000 c.f.s.
1937-06-23
2024-11-22 |
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Repairing highway bridge pier No. 2. Caisson of interlocking steel piling. Wales are 36-inch I-beams.
1936-02-06
2024-11-22 |
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Lower end of concrete transfer skip to lower trestle on west side.
1936-07-01
2024-11-22 |
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West abutment, showing mixing plant, entrance of aggregate conveyor at top and the two placing trestles below ; reinforcing steel in west power house foundation.
1936-06-16
2024-11-22 |
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This is the Westside slide area as it appeared on March 26, 1934.
1934-03-26
2024-11-22 |
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A section of the scroll case for a 14,000 hp. station service turbine is lowered into position.
1940-05-07
2024-11-22 |
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4' x 4' box culvert for carrying the waters of Pingston Creek beneath the relocated Kettle Falls to Williams section of the Great Northern Railroad.
1940-11-11
2024-11-22 |
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A section of the rubble masonry retaining wall for the right abutment parking area is completed.
1939-06-20
2024-11-22 |
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Looking west over the outlet works and conduit liners at elevation 1036 during the course of installation.
1939-08-10
2024-11-22 |
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Making Tiltmeter readings through a special telescope. During foundation grouting, exacting observations were made to determine if any movement of the rock had occurred due to grout being forced into the rock seams and fissures.
1939-10-24
2024-11-22 |
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Looking east into the main unit generator room of the left power house during the course of construction. The downstream wall is near to completion for bays L-1 to 9 inclusive, and construction of the power house roof in progress at L-9, 8, and 7.
1939-10-30
2024-11-22 |
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A workman wearing wooden "snowshoes" sets a "hairpin" anchor wire in the new concrete. When the concrete hardens, a form tie rod can be fastened to the "hairpin";
1938-09-23
2024-11-22 |
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The 1938 flood waters top the spillway "A" blocks at elevation 975 and overflow the blockouts recesses prepared for future installation of the elevation 934 outlet works.
1938-05-28
2024-11-22 |
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Excavating on 1840 level in Brett gravel pit, August 4, 1937.
2024-11-22
2024-11-22 |
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Inside view of the timber crib construction of the upstream cross-river cofferdam at the east shore.
1937-02-18
2024-11-22 |
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Looking northeast along high trestle. Center section "E" of steel cofferdam at bottom. Eastmix in upper center. Diverted river at lower portion of picture.
1937-06-28
2024-11-22 |
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Columbia River flowing through diversion channel, 262,000 c.f.s. high trestle almost completed.
1937-06-23
2024-11-22 |
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Bridge pier repairs. Inside caisson (interlocking piles) showing top rows of 36-inch I-beam walers and timber bracing.
1936-01-30
2024-11-22 |
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Aerial view, looking upstream, at west end of dam after diversion.
1905-04-19
2024-11-22 |
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Catwalk across Columbia River about 1000 feet below dam site. Part of Government Camp in the Distance.
1935-06-21
2024-11-22 |
