Wastewater Treatment Plant Improvements

City of Greenfield, Indiana

Project Need

  • Originally constructed in the 1960s, updated and expanded through the 2000s
  • Includes one (1) main activated sludge wastewater treatment facility and two (2) trains of Actiflo high-rate settling processes
  • Peak flow was designed to be 10.0 MGD and is exceeded during wet weather events
  • This overall situation is unsustainable as the aeration system will need a major service in the future
  • The laboratory, office, and locker facilities are old or generally not available as well

Project Description

The purpose of the project was to document operational issues and analyze the function of the existing wastewater treatment plant (WWTP) with respect to common design standards and provide alternative improvements and recommendations for the WWTP improvements for a 20-year planning period.

The selected solution included the replacement of the existing WWTP with a new plant consisting of the raw sewage lift station, valve vault, and controls building; headworks building with screening, grit, and odor control equipment; SBR treatment system with blowers, mixers, and decanters; UV disinfection system; low-profile cascade aeration system; non-potable water system; sludge processing system including a sludge holding tank, blowers, mixers, decanters, sludge pumps, centrifuge dewatering, polymer feed, and conveyor system; chemical feed system for phosphorus removal, septage receiving station, vac truck screenings drying beds, lab and office building, emergency generators; and demolition of existing plant equipment, process tanks, and buildings.

Project Update – January 2023

The new WWTP for the City of Greenfield is just three months into a 24-month schedule and progressing nicely. The base mat for the SBR is complete, and the walls are moving along quickly. Once complete, this will be the largest SBR in the State of Indiana and will include a new Influent Pump Station, Headworks with grit removal, four (4) SBRs with a sludge holding tank, UV disinfection, a sludge dewatering building with a centrifuge, and a new administration building. To date, through collaboration between Commonwealth Engineers, Inc., and the contractor F.A. Wilhelm Construction, the project cost has been reduced to less than the original bid amount.

Additional Projects

Wastewater
Wastewater Treatment Plant Improvements – Greenfield, Indiana
Project Need Originally constructed in the 1960s, updated and expanded through the 2000s Includes one (1) main activated sludge wastewater treatment facility and two (2) trains of Actiflo high-rate settling… Read More
Wastewater
West Side Interceptor Improvements – Richmond, Indiana
Project Highlights Replace gravity sewers Collection system improvements Reduce combined sewer overflows Project Description The Richmond Sanitary District recently finished constructing over $6 million in collection system improvements, which involved… Read More
Wastewater
Wastewater Treatment Improvements – Syracuse, Indiana
The Problem Commonwealth was hired to investigate and provide solutions to an underperforming wastewater treatment system for their oxidation ditches, which was also impacting performance in their clarifiers, requiring frequent… Read More
Potable Water
Water System Improvements – Flora, Indiana
Water System Improvements Town of Flora, Indiana Commonwealth Engineers worked with the Town of Flora on a two-part project to make improvements to their water system. Division “A” – Water… Read More
Wastewater
Long Term Control Plan Improvements – Crown Point, Indiana
Commonwealth Engineers performed a Long Term Control Plan improvements for the City of Crown Point. It included: ANDERSON POND PROJECT The Crown Point Anderson Pond Project is a Long Term… Read More
Wastewater
Long Term Control Plan & Sewer System Modeling – Madison, Indiana
Long Term Control Plan & Sewer System Modeling City of Madison, Indiana Commonwealth Engineers performed a Value Engineering / Alternatives Assessment of the City’s CSO Collection System Improvements Project. Coordinated… Read More
Potable Water
Water System Improvements Project – West Terre Haute, Indiana
A Preliminary Engineering Report and Environmental Report were conducted to address West Terre Haute’s water system concerns.  Reports were completed in compliance with USDA Rural Development/State Revolving Fund Standards to… Read More
Wastewater
Long Term Control Plan Improvements Project – Nappanee, Indiana
Long Term Control Plan Improvements Project City of Nappanee, Indiana CSO Interceptor and Wet Weather Treatment and Storage Facilities Project This project provides collection and treatment of excessive combined sewage… Read More
Wastewater
Wastewater Treatment Plant Improvements – Fairmount, Indiana
Wastewater Treatment Plant Improvements Town of Fairmount, Indiana Commonwealth Engineers, Inc. performed value engineering and construction oversight/inspection for the noted WWTP Improvements Project. Efforts commenced with our Value Engineering (VE)… Read More