The Village of Johnson Wastewater Treatment Facility (WWTF) was among the first in the state of Vermont to meet newly enacted secondary treatment requirements when it began operation in 1970. After legislative changes more than two decades later called for stricter discharge limits on phosphorous, ammonia and residual chlorine, the Village of Johnson sought to increase the facility’s flow capacity—especially its ability to handle the high seasonal flows associated with storm events.
The City of Olathe, Kan., is located just outside of Kansas City and is home to a growing population of 126,000, making Olathe the fifth most populous city in the state. Residents depend on the local Cedar Creek Wastewater Treatment Plant (WWTP) to meet their water demand.
A recent $10.2-million upgrade at the regional wastewater treatment plant operated by the Portage (Pa.) Area Sewer Authority doubled the facility’s daily flow rating to 2 million gal per day (mgd) and brought the previously deficient peak rating up to 6 mgd. Added peak capacity was a primary goal of the project to correct hydraulic limitations that previously required repeated bypasses during heavy rainfall events caused by inflow and infiltration (I&I) into the collection system.
City officials in Sullivan, Mo., were notably proud in 1988 when their new aerated wastewater treatment lagoon began operation. Within five years, however, the plant was essentially obsolete due to the reclassification of the effluent-receiving stream by the state’s regulatory agency and apprehensions about the stability of the site’s underpinning geology.
The Newville Borough Water and Sewer Authority (NBWSA) in Newville, Pa., has over 6.5 miles of sewers in the borough, serving a population of 1,326. An additional 5.7 miles of gravity sewers and one pumping station serves surrounding municipalities.
The city of Portage is a former borough within Portage Township in Cambria County, Pa. Before a $10.2 million upgrade, the Portage Area Sewer Authority was operating in a facility built in 1972.