• LOCATION: Stillman Valley, Illinois
  • CLIENT: Village of Stillman Valley
  • CONSTRUCTION COST: $6,633,000
  • SCOPE OF WORK: Preparation of the Preliminary Engineering Report to assist the Village in obtaining funding through the USDA Rural Development Loan program, Preparation of Construction Drawings, Specifications, and Permits required to construct the new WWTP and Sanitary Sewer Extension, On-site Construction Inspection, Shop drawing review and other project administrative duties for the construction phase of the project
  • PROJECT SCHEDULE: Completed – 2015
  • WHA TEAM: Matt Hansen, P.E., Corey Buck, P.E., Dale Hamilton, P.E., Luke Dixon

The Village of Stillman Valley hired Willett, Hofmann & Associates, Inc. (WHA) to design a new water reclamation plant, to replace their aging and deteriorating plant.  The new facility needed to meet current effluent standards and the future needs of the community.  The new facility is designed for a 0.2 MGD and utilizes the following processes: influent lift station, influent grinder, influent filter screening, an activated sludge process, final clarification, aerobic sludge digestion, a belt filter sludge press and a 3,360-square foot administration/process building.  WHA incorporated the activated sludge process, final clarification and aerobic digestion into a package plant design that utilizes common wall construction which in turn reduces the concrete tank construction cost and the overall footprint of the facility.   The project also included the construction of 4,386 feet of 18” diameter sanitary sewer and 265 feet of 36” diameter steel casing pipe bored underneath the Stillman Creek and ICE railroad tracks to connect the existing sanitary sewer system to the new water reclamation plant.

Project engineers at Willett, Hofmann & Associates, Inc. worked closely with the Village and USDA Rural Development during the planning, financing, design and construction of the new water reclamation plant.  WHA prepared a Preliminary Engineering Report to obtain grant and loan funding for the project from USDA Rural Development.