Tag Archives: The Clarifier Project

Introducing the Clarifier Project


One cement wastewater tank, circa 1950.

Two visionary artists.

11 years.

13 birds.

325 volunteers.

450 buckets of water.

800 pounds of grout.

60,000 tiles.

Together they add up to the Clarifier Project, a community-based public art collaboration along the St Vrain river in Lyons, Colorado.


The Clarifier Project was organized by Lyons artists Priscilla Cohan and Cathy Rivers, who approached the town about using the abandoned wastewater tank near the river for community art. Rather than view the outdated concrete structure as an obsolete edifice in need of demolition, the artists envisioned it as the basis for an ambitious cooperative mosaic.


The design of the mosaic is based on the cycle of life symbolized by four trees made of Lyons redstone representing the four seasons along our Front Range of the Rocky Mountains. As you stroll around the clarifier tank, you can follow seasonal changes through various progressions, including the zodiac, evolving shades of flora, and varieties of birds seen at particular times during the year.


Elementary and high school students created the ceramic leaves for the trees; local elders in The Golden Gang crafted the pottery sun; one family intricately pieced each glass-tiled bird. Individuals donated tiles, broken dishes, and many unique items to the design—a doll’s head, blown-glass paperweights, and a lipstick tube are just a few of the items among the 60,000 pieces covering the tank’s 96-foot circumference of concrete.


The clarifier tank was the original wastewater treatment facility for Lyons. As local historian and institutional memory-keeper LaVerne Johnson reminded us at the opening, before the clarifier was built in 1950, every one had an outhouse. LaVerne quipped that the outhouses that are still around came in handy during the flood (I happen to know that the one in the old cemetery got some use, much to a patrolling police officer’s surprise).


In fact, one of the reasons the town was evacuated was because of the loss of the entire septic system. As folks grimly joked, “People had to go because people had to go.” While operational today, the current wastewater treatment plant located just beyond the old tank is still in the process of rebuilding following the flood (a mirror in the mosaic provides a bridge between the old clarifier and the new, modern facility).


Begun nine years before the 2013 flood that evacuated the town amidst tremendous damage, the Clarifier Project has come to symbolize the power of community to heal itself. While the rushing floodwater did reach the tank (the high water mark is commemorated with its own tile), the mosaic, which was still in process, was not significantly destroyed. Instead, the disaster strengthened the public commitment to the project’s completion.


This past weekend marked the two-year anniversary of the Front Range flood, the perfect time to gather as a community in celebration of this amazing structure. Even our governor showed up to congratulate the artists and volunteers for the perseverance required for a project of this scope.


The project isn’t finished; landscaping is the next phase, with plans to integrate the Clarifier into the natural riverscape.


Our town’s healing isn’t complete, either—178 homes were lost, many of which still await demolition, and many friends and families won’t be returning to the community.


This project, though, reminds us that beauty lies along the same river that created chaos and destruction just two years ago. I’m grateful to Priscilla and Cathy for their vision of collaborative, place-based art and to the volunteers for their hours of work. I only spent one afternoon grouting tiles at The Clarifier, but it was enough to help me recognize the power of fulfilling a dream, one tile at a time.





Filed under ecobiography