runoff

"This suggests that efforts to control phosphorus pollution from sources like agricultural runoff are not as effective as we thought," Li said.

In addition to direct application, stormwater runoff and snow melt can contribute to these chemicals in ground and surface water.

Firefighters were working with environmental officials to “contain as much of the runoff as possible,” Humphrey said, citing “chemicals, motor oil and cleaning” products in the auto parts store.

If no one wins a majority straightaway, an instant runoff will occur.

After that will come a “giant mattress of gravel” 12 inches deep, Rock said, laced with perforated pipes to collect runoff and direct it into Liberty Canyon Creek.