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drainage water in the winter time because of (3) above, and thus reduce Arizona' allotment for consumptive use under the anticipated Supreme Court decision, (2) above. The proposal by the United States Panel that additional wells and a bypass...

Equipment failures--scoring on brake piston

Scoring of the leading side of generator break piston #1 due to its tilting during jacking of the rotor. Top of piston is in lathe chuck--leather is removed from the bottom of piston. Unit L-1, Grand Coulee Power Plant

1946-10-16

Farm development--man lays 21 inch irrigation pipe

Laying 21 inch reinforced concrete pipe (Class A-50' head) on the burbank pump laterals EP 1.1 station 50+50. note placing of wire mesh reinforcement for band. This feature under construction by Mathews Brothers about 7 miles east of Pasco,...

1949-06-27

Bonneville Dam: 1939 Aerial Photographs: OCSW 10500 C

Aerial photograph of the Columbia River and surrounding land downstream of the Bonneville Dam. Taken in 1939 as part of the OCSW railroad survey.

2024-04-30
2004-03-09

Engineer recruitment program--flood control projects 2

A map of flood control projects in the Pacific Northwest

1965-04-30

Site preparation-- dump truck

Close up view of a dump truck dumping material during excavation operations.

2024-04-30

Powerhouse construction--powerhouse equipment

Close up view of unidentified equipment

1940-09-09

Coulee Dam irrigation pumping plant and discharge pipes-- view of the west abutment

View of the west abutment from the east parking lot showing the discharge pipes, dam pumping plant and Coulee Dam.

1950-06-01

Coulee Dam irrigation pumping plant and discharge pipes--pump plant construction

Looking north over pump plant construction

1940-06-21

Powerhouse construction--transformer deck

Transformer deck at East Powerhouse

1941-12-29

Powerhouse construction--concrete placement in powerhouse

Men working inside powerhouse

1939-01-20

Spillway and drum gate construction--upstream view of Grand Coulee [01]

Upstream view of the dam

1941-05-09

Spillway and drum gate construction--view of the spillway section [04]

View of the spillway section from the left bank

1941-02-05

Spillway and drum gate construction--east end of spillway

East end of spillway

1940-11-30

Spillway and drum gate construction--drum gate installation

Steel and Form work for drum gate installation. Steel is for spillway crest, bridge piers, and drum gate chamber

1940-06-21

Construction of pipelines, syphons and tunnels--South Coulee Dam, Main Canal Headworks...

South Coulee Dam--Main Canal Headworks--View taken from bank above west outlet transition wall looking east and upstream at the downstream end of a section of the barrels.

1948-07-15

Installation of turbines and generators--rotor being installed [02]

Lowering the L-7 rotor into place

1942-02-02

Chinook migrants

Chinook migrants in dividing box near the end of Dryden Ditch

1940-07-14

Installation of turbines and generators--lowring a shaft into place [02]

Lower face is shaft to water wheel--upper face is 74 ton shaft connecting to rotor shaft. Shaft above is being lowered into place. The two faces are being carefully cleaned and inspected to insure perfect union. There does not dare be any metal...

1941-06-04

Scale models, testing, and oddities--offset between parts

Main unit stop-log guide showing offsets between parts 1 and 2 of drawing 222-D-2204 at elevation 1025.8

1939-03-31

Scale models, testing, and oddities--drill core sample

Drill core sample against white background

2024-04-30

Scale models, testing, and oddities--concrete specimens submerged

View of concrete specimens being tested for resistance to sulfate waters in ponds at elevation 1930 southwest of the 230-Kv switchyard at Coulee Dam. View shows cylinders, bars, and posts from test batches 48-72 setting in original alkali pond...

1949-11-18

Scale models, testing, and oddities--topographic model [03]

Man works on three dimensional model

1938-11-03

Equipment for construction, transportation, and maintenance--interior view of Shasta Unit

This picture is an interior view of the Allis-Chalmers governor for Shasta unit U1 in L7 position showing the speedball motor, relay, and operating linkages

1943-02-24

Riverbanks and slope protection--anchored caisson

Specification No. 2475, March 24, 1949. When this photograph was taken the floating caisson was anchored by its ""A"" frame to the spillway bucket section. The caisson barge with machinery for operating the caisson is between the towers. At the...

1949-03-24