Plum Creek Water Purification Facility Advanced Treatment

We provided design and construction phase services for the addition of advanced treatment processes to the 6 million-gallon-per-day (MGD) Plum Creek Water Purification Facility in Castle Rock, Colorado. The community — taking a proactive approach to developing a sustainable, long-term water supply — set a target to meet its water demand with 75% renewable sources.

The town’s strategy to meet that goal included plans for both indirect and direct potable reuse sources from the community water reclamation facility. This project included addition of systems to provide greater removal of giardia, viruses and cryptosporium while also targeting reductions in contaminants of emerging concern.

We were the original designer of the Plum Creek facility, and the town engaged us to plan this addition of advanced treatment systems that will help the town meet its renewable source goals. Our team led the piloting, design and construction services efforts for the addition of pretreatment, ozone and biological filtration. We provided design services for the addition of raw water blending, biological filtration, advanced oxidation, ultraviolet (UV) treatment, granular activated carbon and residuals handling.