ROCK SPRINGS – None of 19 Wyoming agencies reviewing Simplot Phosphates LLC’s application to build a $350-million-plus ammonia plant near Rock Springs has found a reason to oppose the project.

ROCK SPRINGS, Wyo. — The owner of a fertilizer plant in Rock Springs is proposing an expansion that would allow the plant to produce ammonia. Right now, ammonia has to be brought in by rail car to the ...

Rock Springs senior Carlos Salcido won the 400 meters at the Simplot Games in Pocatello, Idaho, on Saturday. Salcido, who has committed to run for New Mexico, finished in 48.88 seconds. This marks the ...

Wyoming companies have long dug minerals from the earth and shipped them across the country. Few inside the state have turned those minerals into finished products. But some business leaders see signs ...

SWEETWATER COUNTY -- The ammonia plant expansion at the Simplot Fertilizer Complex east of Rock Springs is moving along, with an expected date of commissioning and startup set for December. Plant ...

SODA SPRINGS — J.R. Simplot Co. has rerouted a stream away from tainted waste rock and built a $30 million water treatment plant in its efforts to keep selenium out of the water supply near its Smoky ...