Indianapolis, IN

Michigan Road Wastewater Treatment Plant Expansion – Clay Township Regional Waste District

This project consisted of the planning, design, and construction phases for the Michigan Road Wastewater Treatment Plant Expansion. The planning phase created a master plan to allow up to 12 MGD treatment capacity on the existing plant site for this fast growing area northwest of Indianapolis in Hamilton County, west of Carmel, and east of Zionsville.

The $7.5 million project called for design of a 1.5 MGD plant expansion for a average design plant capacity of 2.55 MGD. The design incorporated a new state-of-the-art preliminary treatment building with odor control, vertical loop reactors to handle peak flows experienced by the District, a secondary clarifier, a return activated sludge pumping station, chemical feed system, solids handling improvements, a UV disinfection system, and post aeration. The 3 existing secondary clarifiers were retrofitted with effluent launder covers and the weirs were modified after they were found to be out of level during the planning phase. The project underwent a staggered construction sequence to facilitate the plant’s need to remain completely in service while the new facilities were constructed.

As mentioned the District service area is experiencing rapid growth and to accommodate this rapid growth strong emphasis was put into the expandability of each structure/process with many sized for the next expansion of another 1.5 MGD.

Greencastle, IN

New Wastewater Treatment Plant, Lift Station & Collection System Improvements

HWC directed this project to relieve the city of Greencastle from a sewer connection ban, helping to open the new Veteran’s Memorial Highway for new economic development, and allowing the construction of a new senior citizens center and the new Putnam County Jail.

Project Highlights:

• Project cost – $12.5 million
• Over 5,000’ of 36” gravity sewer constructed
• 3 lift stations constructed
• First Vertical Loop Reactor type of treatment facility to receive a construction permit in the state of Indiana
• Received Merit Award from Indiana Chapter of ACEC
• Plant can handle peak, wet weather flows, with documented increases of flow from 1.8 MGD to 14 MGD in a 24-hour period receiving full treatment with no bypasses or overflows
• Financed using an IDEM SRF Program
• Power consumption went down 12%
• Staff labor consolidated to one shift

Winchester, IN

Wastewater Treatment Plant Improvements 

HWC’s services for this project included a preliminary engineering study on the collection system and treatment facility. The first project completed as a result of the study was at the wastewater treatment plant. During the study, it was determined that the utility could save energy considerable energy costs by completing a secondary treatment process renovation.

The project design addressed replacement of the coarse bubble diffusers with new fine bubble diffusers and the installation of new, smaller Hp blowers. The 2.2 MGD plant originally utilized 4 – 150Hp blowers to deliver air throughout the plant. The new design utilizes 3 – 75Hp blowers.

The project was financed through an Energy Savings program. The equipment was installed in 2006.

Martinsville, IN

Wastewater Treatment Plant Renovation 

This project was necessary in order to meet the ammonia-nitrogen removal limits required by the plant’s new NPDES permit.

Project Highlights:

• Project Cost $7.5M; Construction Cost $6.6M
• Planning, design, construction engineering, construction observation
• Treatment processes designed to reduce effluent ammonia
• New peak capacity of 6.25 MGD
• Financed with low interest IDEM SRF program
• Utilized existing tanks as part of construction
• New headworks facility with fine screening and grit removal
• Conversion of the existing package plants entirely to aeration
• Two new clarifiers, a sludge return pump station
• A new inline UV disinfection system
• New parshall flume metering structure and aerobic sludge digester tanks to supplement the existing biosolids facilities (belt press)
• Major renovation of a lift station
• New laboratory and control building