On target: the arrowhead east and west tunnels

Article Abstract:

The Inland Feeder designed to increase the amount of state-produced water for Southern California comprises of the Arrowhead East and Arrowhead West Tunnels. The tunnels incorporate structural features like impermeable lining, unique seismic sections and extensive probing and grouting to account for earthquakes and a ground-water monitoring program with 100 monitoring sites. The use of thick-walled steel pipes in fault zones serves a means of protection for the tunnel-workers during earthquakes.

Design and construction, Underground construction, Tunnels, Earthquake damage

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Piggyback tunnels

Article Abstract:

The planned joint construction of two transportation tunnels in Boston, MA, was finally approved by the Massachusetts Bay Transportation Authority and the Massachusetts Highway Dept. after contractors proposed using advanced computer visualization in designing the project. The contractors claimed that serious problems associated with joint construction projects can easily be solved using two sophisticated computer programs, namely, the Graphic Design System and the Arris.

Software, Tunnel construction, Public works, Information management, Boston, Massachusetts, Tunneling, Structural design

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Tunnels to control flow, reduce erosion in Utah rivers

Article Abstract:

Utah's water agencies' plan to double the amount of water transferred from aqueducts to Salt Lake city and nearby areas is expected to protect the scenic environment of the state through pipelines and tunnels. The $60-million Diamond Fork system is just a part of the Central Utah Project which is aimed at a more even distribution of water to Davis, Salt Lake, Weber and Wasatch counties.

Utah, Water tunnels

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