Box 7

Container

Staff Only

Contains 4 Results:

Specifications HH-166 for Furnishing and Installing Chlorine and Ammonia Equipment for the Tesla Portal Chlorinating Plant in the Coast Range Division of the Hetch Hetchy Aqueduct, 1936

File — Box: 7, Folder: 1

Identifier: Subseries 1_2:

Dates: 1936

Found in: California Historical Society / MS 980, William W. Helbush collection of water project records / Hetch Hetchy water supply project records / Project records / Tesla Portal Chlorinating Plant, Hetch Hetchy Aqueduct

Specification for Manually Operated Gate Valves for the Crystal Springs Pipe Line No. 2 (P.W.A. Docket 1510-6d), 1935

File — Box: 7, Folder: 2

Identifier: Subseries 1_2:

Dates: 1935

Found in: California Historical Society / MS 980, William W. Helbush collection of water project records / Hetch Hetchy water supply project records / Project records / Crystal Springs Pipe Line No. 2

Specification No. 112 for the Construction of the Crystal Springs Pipe Line No. 2, Crystal Springs Dam to Burlingame (Federal Public Works Docket 1510-5C), 1936

File — Box: 7, Folder: 3

Identifier: Subseries 1_2:

Dates: 1936

Found in: California Historical Society / MS 980, William W. Helbush collection of water project records / Hetch Hetchy water supply project records / Project records / Crystal Springs Pipe Line No. 2

San Francisco Water Department Specification No. 156, Construction of the Palo Alto Pipe Line (San Mateo and Santa Clara Counties), 1937-1938

File — Box: 7, Folder: 4

Identifier: Subseries 1_2:

Dates: 1937-1938

Found in: California Historical Society / MS 980, William W. Helbush collection of water project records / Hetch Hetchy water supply project records / Project records / Palo Alto Pipe Line