Duke Energy has reached a settlement with the North Carolina Attorney General, the Sierra Club and Public Staff of the North Carolina Utilities Commission over coal-ash cleanup costs.

Denver International Airport has begun the search for consultants in a plan to add a seventh runway to the nation’s fifth-busiest aviation facility.

Unforeseen soil conditions and the addition of a protective rail-operations barrier will delay a scheduled 2023 completion of the $2-billion Southwest Light Rail Transit project in Hennepin County, Minn.

Plan includes new way to calculate domestic content for construction materials, other products.