Excavation for the $700M Lake Mead Intake No. 3 Project was put on hold after tunneling encountered a fault carrying groundwater that flooded the excavation and submerged equipment. The flooding occurred over about 4-days, so there were no injuries reported. The Southern Nevada Water Authority ‘Third Straw’ project will secure the Lake Mead water supply for thirsty Las Vegas in the face of declining lake levels. The contractor will drill into the fault and grout it so the water can be pumped out and work can proceed. Check out this interesting SNWA project overview video for the ‘Third Straw’ project. [Source: Las Vegas Sun via ASCE SmartBrief. Image: Southern Nevada Water Authority]
Related Articles
Golder Wins Bentley YII Award for Hong Kong Tunnel Project
October 29, 2020
rockman
Miscellaneous
Comments Off on Golder Wins Bentley YII Award for Hong Kong Tunnel Project
Viaduct Inspections Show Settlement Problems Long Before Tunneling
February 19, 2015
rockman
Project Related
Comments Off on Viaduct Inspections Show Settlement Problems Long Before Tunneling
Rising Costs and Delays in Seattle Area Wastewater Plant and Tunnels
February 25, 2008
rockman
Project Related
Comments Off on Rising Costs and Delays in Seattle Area Wastewater Plant and Tunnels
In keeping with our theme of rising costs on tunnel projects, the Brightwater sewage-treatment plant and treated waste pipeline project in King County Washington (Seattle area) is now up to at least $1.84 billion according to the lead consultant on the project. The treated waste pipeline is 13 to 14-miles long and at depths of 40 to 440-ft! It is being constructed nearly entirely by TBM. One source of delay was due to a tunneling subcontractor not being able to get parts (ball bearings?) because they were all being requisitioned by the US War Department for use in military equipment in Iraq and Afghanistan. Click through for information sources and links.