From the Grand Junction Free Press (Sharon Sullivan):

The three huge lagoons used by the former wastewater treatment plant serving Clifton no longer exist. Instead the Clifton Sanitation District, 3217 D Road, has a new system which treats wastewater in a more controlled environment, using less space, less energy, and with fewer odors. Clifton Sanitation Districts I and II consolidated to create a new wastewater treatment plant that complies with water quality standards mandated by the Environmental Protection Agency and the state of Colorado. A federal mandate to protect four endangered fish species is what drove the project, said manager Brain Woods.

More endangered species coverage here.