Community Wastewater System

Addison, Vermont | Town of Addison

The Addison Town Hall and Addison Community Baptist Church needed a centralized wastewater system to reestablish use of the historic Town Hall building, which sat vacant for nearly a decade. The structure required significant renovation, and its marginal (mostly clay) soils and a high water table made a conventional on-site wastewater system infeasible. At the same time, aging on-site wastewater systems served the nearby fire station and Town Clerk’s Office. D&K completed a PER, an environmental report, and design for a community wastewater collection system and mound wastewater treatment and disposal system to serve multiple public buildings within the village area. Our team used previous soil mapping and test pitting to identify an off-site location with well-drained loamy soil. To minimize pipe size, each building is served by a septic tank for solids collection, and effluent is directed to a mound system by gravity through smaller-diameter pipes. 

Markets:

Project Elements

• Design of an innovative collection system and an on-site disposal system with a capacity of 4,300 GPD
• Support to secure State Revolving Loan Funding (SRF)
• Completion of wetland delineation and implementation of the innovative wastewater system
• The project was featured in an Interagency Initiative collaborative presentation discussion as an example of a small Vermont village center in the context of how the state can support village centers more effectively.

Awards

Merit Award for Engineering Excellence, ACEC-VT

Sustainable Elements

To reduce energy consumption, a FLOUT (floating outlet) tank doses the mound system instead of a traditional pump.