Download or read book Historic American Engineering Record written by and published by . This book was released on 2014 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Bay Crossing Reach features some of the most complex and critical engineering components in the entire Hetch Hetchy Aqueduct system. In general, the Aqueduct is significant at the state level as it illustrates a pivotal shift in potable water collection and distribution in the San Francisco Bay region from reliance on local private water companies to a reliable, but distant, municipal water supply. In addition, the system utilized multiple innovative engineering structures to efficiently deliver water to the metropolitan region aprimarily by gravity flow. The scale of the water system had few peeers at the national level during the same period as only the Metropolitan System in Boston and the Catskill supply system in New York were larger. The Bay Crossing Reach utilized a unique combination of a pipleine bridge, wooden trestles, submarine pipe, valve houses, and a large concrete caisson to transmit water under and over San Francisco Bay, all concrete caisson to transmit water under and over San Francisco Bay, all while retaining sufficient hydrostatic pressure of the water line generated by gravity alone. By utilizing a complex array of structures to eliminate the need for a costly pumping station, the Bay Crossing Reach engineers, such as John Ripley Freeman and Michael M. O'Shaughnessy, conveyed their mastery in the planning and design of an efficient muicipal water delivery system. Consequently these individuals were also recognized nationally for their accomplishments"--Pages 1-2.

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Download or read book Historic American Engineering Record written by Historic American Engineering Record and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes photocopies made in 1985 of historic photographs, original photographs taken in 1985, and photographs taken in May 1989.

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Download or read book The Trans Mississippi West 1804 1912 A guide to records of the Department of the Interior for the territorial period Section 1 Records of the Offices of the Secretary of the Interior and the Commissioner of Railroads Section 2 Records of select agencies Section 3 Records of the General Land Office written by and published by . This book was released on 1997 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Subject Guide to U S Government Reference Sources written by Gayle J. Hardy (Davis) and published by Bloomsbury Publishing USA. This book was released on 1996-09-15 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revised and updated, this compendium helps readers identify and understand the scope of key government reference sources-traditional books (including publications catalogs and telephone directories); information clearinghouses; and materials in new formats, such as CD-ROMs, datafiles, and Internet sites. The authors focus on free information and depository materials-both readily available through toll-free phone numbers, mail or e-mail requests to agencies, or federal depository library collections. Materials are fully described in annotations that differentiate between similar materials, identify typical citation formats, and note common abbreviations

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