LAS VEGAS - The Federal Highway Administration says work has stopped on a portion of the Hoover Dam bypass project while authorities investigate an accident that killed a worker.
Most details of the Monday accident, including the worker's identity, haven't been made public.
Project officials released a statement Tuesday saying it occurred while workers were adjusting a cable aligning temporary concrete towers supporting construction of twin arches for the bridge.
The investigation is being conducted by the federal Occupational Safety and Health Administration and contractors Obayashi Corp. and PSM Construction USA Inc.
When completed in late 2010, the bridge will carry four lanes of U.S. Highway 93 traffic between Arizona and Nevada, bypassing a winding two-lane road across the dam.
The highway is a key route between Las Vegas and Phoenix.