The Aberdeen development in Porter County, Indiana comprises approximately 700 residential and commercial units. There was a pressing need to develop a way to collect and dispose of their sewage. The initial plan involved a system requiring septic tanks to be located on each property, small diameter sewers and 25 acres of constructed wetlands and septic drain fields. The costs were prohibitive and NIES Engineering was called upon to engineer a more cost-effective mechanism.

NIES proposed a conventional gravity sewer system and a highly efficient small wastewater treatment plant. The initial cost savings were approximately $1,000,000. The long term savings resulting from avoiding the maintenance of 700 septic tanks were also substantial.

Cost savings aside, the treatment plant performance has consistently adhered to all IDEM requirements. The collection system was designed for minimal leakage and resulting treatment plant flows have been substantially below expectations. Because of this there is no significant increase in plant flowrate is experienced during rainfall events, which means that the client has not paid for any plant capacity that they do not fully need.

By working together, the Nature Works Conservancy District and NIES Engineering have created a high performance sewage collection and treatment system which has proven cost effective to build and to operate.

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