U.S. Infrastructure Improves, but Cuts May Imperil Progress, Report Says
A report card from an engineering group found that American roads, ports and other infrastructure got better last year but could be hurt if federal funding is reduced.
Levees and Dams
This Tiny Fish’s Mistaken Identity Halted a Dam’s Construction
Scientists say the snail darter, whose endangered species status delayed the building of a dam in Tennessee in the 1970s, is a genetic match of a different fish.