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· Dam construction / Businessmen
o Description: This page contains information about “Officials of Bureau and Six Cos., Inc., with first Assistant Secretary of the Interior Theodore F. Walters at Boulder City. Left to right: John C. Page, Office Engineer, Bureau of Reclamation; W.A. Bechtel, President, Six Cos., Inc.; Theodore A. Walters; C.F. Shea, Director of Construction, Six Cos., Inc.; Sims, City Manager, Boulder City; Frank T. Crowe, Gen. Supt., Six Cos., Inc.; Walker R. Young, Construction Engineer, Bureau of Reclamation.“
· Dam construction / Cableways
o Description: This page contains information about “Looking across canyon along cables from top of 150-ton permanent cableway head tower. Boulder Dam.“
· Dam construction / Cableways
o Description: This page contains information about “Nevada anchorages of permanent 150-ton cableway at Boulder Dam.“
· Dam construction / Cableways
o Description: This page contains information about “Movable cableway towers under construction on rim, Nevada side. Thrust rail seen in foreground.“
· Dam construction / Cableways
o Description: This page contains information about “Complete view of movable cableway tower seen in No. 1490.“
· Dam construction / Cableways
o Description: This page contains information about “Cables and sockets for permanent 150-ton cableway in storage at Boulder City yards. These are 3-1/2“ fabrications furnished by the American Steel & Wire Co., subcontracting under the Lidgerwood Mfg. Co.“
· Dam construction / Cableways / Cliffs
o Description: This page contains information about “Roosevelt Dam. General view of south spillway, looking downstream.“
· Dam construction / Cableways / Construction inspections
o Description: This page contains information about “Dead weight test on one of Six Companies' 20-ton cableways. Span is designed to a 20-ton capacity and is being tested with concrete block 26 tons in weight.“
· Dam construction / Cableways / Dams
o Description: This page contains information about “Pathfinder Dam, looking upstream.“
· Dam construction / Cableways / Dams
o Description: This page contains information about “Pathfinder Dam; upper face.“
· Dam construction / Cableways / Dams
o Description: This page contains information about “Pathfinder Dam, lower face.“
· Dam construction / Cableways / Dams
o Description: This page contains information about “Pathfinder Dam; upper face at close of 1908 season.“
· Dam construction / Cableways / Dams
o Description: This page contains information about “Lower face of Pathfinder Dam, showing location of loaded drill holes.“
· Dam construction / Cableways / Hoisting machinery
o Description: This page contains information about “Foundation of dam.“
· Dam construction / Cableways / Machinery / Valves
o Description: This page contains information about “Below Roosevelt Dam, showing the 38“ needle valves.“
· Dam construction / Cableways / Spillways
o Description: This page contains information about “Looking upstream across Arizona spillway. Cableway tail towers and fill seen at left.“
· Dam construction / Cableways / Spillways / Towers
o Description: This page contains information about “Nevada spillway and adjacent terrain as seen from Arizona rim of Black Canyon. Head towers for Six Companies, Inc., cableways Nos. 5 and 6 seen on bench above spillway structure. Downstream is to the left in the photograph.“
· Dam construction / Cableways / Structural frames
o Description: This page contains information about “Foundation framework and reinforcing steel for 150-ton permanent cableway hoist house.“
· Dam construction / Cableways / Structural frames / Forms / Laborers
o Description: This page contains information about “Placing concrete in panel forms near downstream toe in Boulder Dam foundation. An 8-cubic yard bottom-dump bucket handled over cableway is in use.“
· Dam construction / Cableways / Towers
o Description: This page contains information about “Head tower, hoist house, and anchorage of permanent 150-ton cableway at Boulder Dam. View from upper end of Hi-mix gulch.“
· Dam construction / Cableways / Towers / Machinery
o Description: This page contains information about “Typical interior view of head tower of one of Six Companies Inc., cableway installations. View from switch deck shows winches, motors and air compressors units. Operators cage seen in upper left.“
o Description: This page contains information about “Panorama of general works area taken from top of forebay slope on the east side. From left to right at top of picture can be seen the silos in the cement storage and blending plant; the 60-inch main line conveyor running to the spoil pile in Rattlesnake Canyon; the 3,000 ft. steel cellular west side cofferdam behind which is the exposed bedrock; concreting plant; bents for the high and the low concrete placing trestles; the sand and gravel conveyor suspension bridge; Coulee Dam, the Government townsite; the highway bridge, and farther down the river the combination highway and railroad bridge built by the contractor. In the near foreground is the general east side excavation area with conveyors running to the cross-river conveyor, connecting with the main line on the west side; the east cofferdam; the machine shop area of the contractor; the sand and gravel unloading arrangement, and Mason City, the contractor's camp.“
o Description: This page contains information about “Interstate Canal. Headgate at Sta. 2088.“
o Description: This page contains information about “Salt River - Power Canal - Temporary repair in fill section near mil3 12. Heavy lining is recommended through this section of canal. Sta. 698.“
· Dam construction / Canals / Concrete
o Description: This page contains information about “Interstate Canal. Lining at Mollie's fork, showing forms and partially completed concrete work.“
o Description: This page contains information about Huntley, Montana Reclamation Project, 1905-1931, Arrow Creek Crossing, showing forms up and arrangement of plant.
· Dam construction / Canals / Flumes
o Description: This page contains information about “Interstate Canal. Cottonwood flume looking southwest, showing completed structure and basin above flume under construction.“
· Dam construction / Canals / Masonry
o Description: This page contains information about “Salt River - Power Canal - Rubble masonry spillway channel for grapevine sluiceway. Built by Government forces.“
o Description: This page contains information about “Looking upstream through Black Canyon toward Hoover Damsite showing extent to which lower level of canyon is choked with debris blasted and stripped from abutments and canyon walls. Outlet portal of diversion tunnel No. 2 and temporary backwash barrier seen in foreground.“
o Description: This page contains information about “Looking upstream through Black Canyon toward Hoover Damsite showing condition after diversion of Colorado River. Lower levels of canyon choked with material blasted and stripped from canyon walls. Downstream rock barrier seen in foreground.“
o Description: This page contains information about “Panorama of canyon rim above Hoover damsite on the Nevada side. From left to right are seen: Operating tower for 150-ton cableway, Six Companies' high level concrete mixing plant, cableway operating over damsite, cableway operating over intake towers and spillways. In the foreground are seen, left to right: riprap retaining fill over mixing plant gorge, upper abutment excavation, upper intake towers excavation.“
o Description: This page contains information about “Dam site and structure as seen from point on Arizona canyon rim roughly defined by coordinate point N 31,000, W 48,700. View looks downstream.“
· Dam construction / Canyons / Basins
o Description: This page contains information about “Cableway runway at Elev. 1360 above Arizona spillway as seen from hill above spillway basin.“
· Dam construction / Canyons / Cableways
o Description: This page contains information about “Erecting movable tower for 20-ton cableway to operate over Hoover Damsite. Note inclined rail on canyon side of structure which is designed to carry thrust.“
· Dam construction / Canyons / Cableways / Floods
o Description: This page contains information about “View from point #1, showing flood.“
· Dam construction / Canyons / Erosion
o Description: This page contains information about “Pressure structure cleavage developed along the walls of the canyon. This structure which produces thin slabs or cleavage plates nearly parallel to the free surface is believed to be due to the removal of supports, by reason of erosion of the canyon, in rock under great strain. This is an attempt at readjustment.“
· Dam construction / Canyons / Excavation
o Description: This page contains information about “Excavation for Nevada canyon wall outlet works and conduits. View looks directly against canyon wall and shows the excavation for construction adit at right.“
· Dam construction / Canyons / Laborers
o Description: This page contains information about “Operations on canyon walls“
· Dam construction / Canyons / Laborers / Drilling
o Description: This page contains information about “Drillers at work on canyon wall above power plant location.“
· Dam construction / Canyons / Rivers
o Description: This page contains information about “Pathfinder Dam site looking upstream.“
· Dam construction / Canyons / Rivers
o Description: This page contains information about “Pathfinder tunnel; Construction of grizzly at entrance, showing chute, character of rock above grizzly .“
· Dam construction / Canyons / Rivers
o Description: This page contains information about “North Platte Dam site, Wyo., from point just below the line of dam site looking upstream.“
· Dam construction / Canyons / Rivers / Bridges
o Description: This page contains information about “View looking into Black Canyon from rim of the Arizona wall showing operations in the early stages of the upper cofferdam construction. Temporary cofferdam diverts river flow through Arizona side of channel. Nevada side inside temporary cofferdam is partially unwatered and muck is being removed by dragline, shovel, and truck. Upstream slope of cofferdam proper is indicated by white paint line on Nevada wall above truck road. Temporary barrier will be dumped from bridge near which pile driver barge is anchored, and will divert entire river flow through Diversion Tunnels Nos. 2, 3 and 4 during cofferdam construction. First diversion will be through Tunnel No. 4 during the latter week of October.“
· Dam construction / Canyons / Roads
o Description: This page contains information about “Looking downstream through Black Canyon. View shows downstream cofferdam and rock backwash barrier. Construction roadways seen against canyon sides.“
· Dam construction / Canyons / Steam shovels / Trucks
o Description: This page contains information about “Preliminary cofferdam construction. River is diverted through Arizona side of channel by temporary cofferdams the area within which is being mucked out. View looking downstream from Nevada side.“
· Dam construction / Canyons / Tunnels
o Description: This page contains information about “Looking down on the inlet portals of Arizona diversion tunnels Nos. 3 and 4 from near the top of the Nevada canyon rim.“
· Dam construction / Canyons / Water pumps
o Description: This page contains information about “Pathfinder Dam; centrifugal pumps in foundation.“
o Description: This page contains information about “Pathfinder Dam; method of piling cement; looking northwest.“
o Description: This page contains information about Los Angeles District - Prado Dam Subproject No. 210 - Work Done Under Contract - Regular Funds - Taken March 11, 1939. Vol. XIV, No.8. View Upstream Toward Left Abutment Showing Rock Drain Under Construction.
· Dam construction / Channels / Machinery
o Description: This page contains information about “Stewart Mountain Dam. General view of spillway channel looking toward left abutment of dam. Note left wall completed from sta. 0+0.0 to sta. 4+0.0.“
· Dam construction / Channels / Machinery / Trucks
o Description: This page contains information about “Stewart Mountain Dam. View looking downstream, new spillway channel. Left counterfort wall in lower left corner.“
· Dam construction / Cities & towns
o Description: This page contains information about “View of a portion of Boulder City from Upper Tank Hill showing residences under construction by Babcock & Wilcox through middle school and Municipal Building are seen in near background.“
· Dam construction / Cities & towns
o Description: This page contains information about “General view of operations at Grand Coulee Dam showing damsite, government town and contractor's town as seen from hill above gravel plant.“
· Dam construction / Cities & towns
o Description: This page contains information about “A three-view panorama of the development from top of east abutment.“
· Dam construction / Civil engineering / Excavation / Progress photographs / Reclamation of land
o Description: This page contains information about Looking from north side. General view of construction work on Vandalia diversion dam. Milk River in foreground. Excavation of south abutment in distance.
o Description: This page contains information about Lower Yellowstone Project.
o Description: This page contains information about Lower Yellowstone Project.
o Description: This page contains information about “A part of the west abutment.“
· Dam construction / Cliffs / Canyons / Laborers
o Description: This page contains information about “Scaling crew on Nevada wall of Black Canyon above power plant location.“
· Dam construction / Cliffs / Springs
o Description: This page contains information about “One of the hot springs issuing from a crevice in the side of a large pot-hole ten feet above the floor of the middle gorge. This spring registered a temperature of 88 degrees F. Sample No. 2 of the water taken for analysis.“
· Dam construction / Coffedams / Excavation / Walls
o Description: This page contains information about “Steel piling cells under construction between the north end of 'Block 40' and cofferdam section 'G.' In the lower left corner are some of the timber struts in place between the two steel walls between which excavation is under way removing bedrock overburden.“
· Dam construction / Cofferdams
o Description: This page contains information about “Evaporation tower for Boulder Dam precooling system located on downstream cofferdam. View from Nevada outlet valve house bench.“
· Dam construction / Cofferdams
o Description: This page contains information about “Construction of Upper Cofferdam“
· Dam construction / Cofferdams
o Description: This page contains information about “View from east tailrace slope - east and center conveyor suspension bridge towers - cofferdam, and in center of picture is railroad trestle to the west mixing plant.“
· Dam construction / Cofferdams
o Description: This page contains information about “Back of the west cofferdam, under construction. Sand and gravel bridge overhead.“
· Dam construction / Cofferdams
o Description: This page contains information about “A general view of the damsite from the west bank showing concrete placing trestles on lower right, construction at block 40 and west cofferdam across the center, east cofferdam and exposed bedrock in the lower background and the suspended conveyor extending across the picture.“
· Dam construction / Cofferdams / Bridges
o Description: This page contains information about “Another view of operations behind the cofferdam section 'E' (see 702). The men overhead are placing the floor on the suspension bridge that will carry the sand and gravel conveyor.“
· Dam construction / Cofferdams / Excavation
o Description: This page contains information about “View inside of west cofferdam showing heavy timber bracing across the special box type structure in excavating for block 40. East side cofferdam across the river, main span of suspension bridge for aggregates conveyor and M.W.A.K. shops on left.“
· Dam construction / Cofferdams / Excavation / Bridges
o Description: This page contains information about “Inside of west cofferdam showing whirley cranes excavating in block 40.“
· Dam construction / Cofferdams / Machinery / Canals
o Description: This page contains information about “Interstate Canal. Driving sheet steel piling for coffer dam at the heading or intake of the main Interstate Canal.“
· Dam construction / Cofferdams / Machinery / Shipping
o Description: This page contains information about “Behind the Wakefield piling cofferdam under construction on the west side. In the foreground are some of the 60-inch belts coming up from the conveyor feeders below. A portion of the cellular steel piling cofferdam on the west side is shown at the top and to the right is the government field office, the warehouse and a part of Coulee Dam, the townsite for government employees.“
· Dam construction / Cofferdams / Rivers
o Description: This page contains information about “Uncovered rock at east abutment - east side Wakefield piling cofferdam conveyor crossing Columbia River to west side spoil pile in Rattlesnake Canyon. In the near foreground, sections E, D, and C of west cofferdam.“
· Dam construction / Cofferdams / Rivers / Excavation
o Description: This page contains information about “Typical muck moving equipment. Photo shows dump buggy hauled by tractor dumping load onto grizzly for transportation to spoil bank by belt system.“
· Dam construction / Cofferdams / Roads / Excavation
o Description: This page contains information about “A general view looking west across the damsite - east excavation pit with conveyor feeder in foreground, cofferdams on both sides of river, conveyor bridge crossing river and main conveyor leading up the hill to spoil dump in Rattlesnake Canyon, also the Westmix concrete plant, placing trestles and aggregate conveyor on suspension span to the right.“
· Dam construction / Cofferdams / Roads / Excavation
o Description: This page contains information about “An upstream three-view progression picture showing development of the east bank area.“
· Dam construction / Cofferdams / Structural frames
o Description: This page contains information about “East cofferdam under construction.“
· Dam construction / Cofferdams / Water pumps / Holes
o Description: This page contains information about “Deep hole in block 40-A. Note the small amount of seepage water with the pump sump located about 100 feet from the cofferdam and 113 feet below the surface of the river.“
o Description: This page contains information about “Panorama of upstream face of upstream cofferdam. Crest of fill at maximum elevation 720. Concrete surface in progress.“
o Description: This page contains information about “Roosevelt Dam. South spillway. Note concrete excavation at crest.“
o Description: This page contains information about “Roosevelt Dam. View of downstream side of north spillway, showing new concrete aprons and crests.“
· Dam construction / Concrete / Cableways / Forms
o Description: This page contains information about “Placing concrete in panel or column forms near downstream toe in Boulder Dam foundation. An 8-cubic yard bucket handled over cableway is in use.“
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