The City of Holyrood’s 3-cell sanitary treatment facility had extreme algae growth, resulting in frequent TSS violations and a schedule of compliance from KDHE. The City wanted a system that was low maintenance and would reliably meet permit. EBH determined building an additional wetlands cell to make the system non-discharging was the best way to do that. By working with City personnel, KDHE regulators, and local landowners, EBH was able to provide a long-term solution at minimal cost to the City.

Since there was no seepage limit for this wetlands cell, no clay liner was constructed. Erosion of the inside slopes is prevented by vegetation growth. The cell is designed with three different water depths to encourage a healthy ecosystem with a variety of wetlands plants.