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New York water-tunnel section finished after 22 years

Article Abstract:

The construction of New York, NY's third water tunnel aims to provide additional water supply facilities to meet the city's water demands. Two water tunnels are presently supplying the city with water but failure on any one of these will cause water shortage. The project engineers have completed stage one of the concrete-lined pressure tunnel and are also building a new permanent water chlorination facility for all three tunnels. The city plans to rehabilitate Tunnels 1 and 2, after which they will rotate the use of the three tunnels to effectively monitor their condition and performance.

New York, New York, Water tunnels

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Dallas light-rail tunnel breaks new ground

Article Abstract:

The construction of Dallas' first light-rail starter system features the largest drilled shaft tunnel. The project team is utilizing new management practices to ensure the success of the project. These include a geotechnical design summary which outlines probable design and construction conditions, escrow bid documents with provisions for costs of claims and disputes, and an arbitrary body for resolving conflicts between owner and contractor. Partnering techniques are also being used wherein all concerned parties discussed the project at the onset.

Methods, Management, Project management, Transportation, Light rail transit, Dallas, Texas

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Wind tunnel takes off

Article Abstract:

Engineers repaired the wind tunnel at the NASA Ames Research Center in Moffett Field, CA. Facilities inspectors found that the original windtunnel had already failed and this was demolished in 1989. Project engineers are now constructing a new tunnel but will fit this structure with the old foundation to reduce construction costs. The latter needed seismic reinforcement and this was done by adding piles and grade beams. As-built layouts were cross-checked for accuracy to ensure that the new structure will fit onto the old foundation.

Buildings and facilities, United States. National Aeronautics and Space Administration, Wind tunnels

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