A final design consideration is an emergency spillway or diversion structure. The total retention volume of these filters should be designed to treat the surface runoff of a particular design storm ...

A drone panoramic view of Oroville Dam and main spillway at Lake Oroville in Butte County, Calif. Photo taken March 11, 2025.

A Critical Metal Jumps 500% After Xi Replies to Trump Tariffs Columbia University yields to Trump admin demands over revoked $400M in federal funding The S-72 X-Wing! A Flying Experiment with ...

More than a mile long, the Grand Coulee Dam is the largest concrete structure in the U.S. In the fall of 2011, dam operators agreed to open the spillway just for American Experience. "It was very ...

The storm is expected to dump 1 to 2 inches of rain along the coast and up to 4 inches in the valleys at rates that could cause problems. Some roads will be closed starting Wednesday.

Editor's note: The Asheville Citizen Times will answer your Helene-related questions in our newly launched Sunday "Asheville Answers" column. We will also answer other burning questions.

A storm carrying heavy rains felled the Penelec ... because “there was more water than the spillway could handle” after about 3 inches of rain, Blake said. Everyone at the scene agreed the ...

A plan has been devised to unleash the Wairoa River in periods of heavy rain through land near North Clyde, fixing a troublesome kink in the river that failed the suburb in Cyclone Bola and Gabrielle.