Engineers and workers at Lake Oroville race to complete critical spillway repairs to mitigate catastrophic flood risk for downstream communities.

The joint venture of Skanska and Kiewit has withdrawn its bid for the $3.6-billion expansion of the Hampton Roads Bridge Tunnel in Virginia.

Large contractors know it can’t last, but right now the market continues to expand, and few firms see any clear signs of a slowdown.

Officials will use design-build to cut 18 months and $35 million from earlier estimates.