Richard P. Arber Associates designed a 1.2 million gallon per day (mgd) reclaimed water treatment plant and a 10 mgd irrigation pumping station for the Inverness Water and Sanitation District. The Inverness District uses reclaimed water for landscape irrigation of the Inverness Business Park and the Inverness Golf Course. This project provides additional treatment meeting requirements of the Colorado Department of Public Health and Environment for primary contact.

Unit processes at the new treatment plant include coagulation with liquid alum, flocculation, filtration in continuous backwash filters, and disinfection with sodium hypochlorite. Sodium hypochlorite was selected as the disinfectant to meet safety concerns and reduce insurance rates. Backwash water from the filters will be discharged to a sanitary sewer. Solids in the backwash water are removed in the Inverness District's wastewater treatment plant and disposed of with biosolids from the wastewater plant.

The project was constructed in two phases. The first phase included buildings designed for the ultimate capacity of the plant, treatment equipment sized for 0.6 mgd, and pumping equipment sized for 6 mgd. The second phase of the project will include installation of additional treatment and pumping equipment to increase the treatment capacity of the facilities to ultimate capacity. Construction of the first phase of the project was completed in 1998.