Wastewater Treatment Facility Improvements Project

This project included the construction of improvements to the municipal wastewater facility to meet a DEQ issued consent order and to provide adequate capacity for existing connections.  The City’s existing facility was a non-discharging facility and had reached capacity requiring frequent pumping and transport of wastewater to other facilities.

This project designed 19 million gallons, total volume, of new HDPE lined reservoirs to allow for a fully evaporative system and not require any discharge.  The facility was designed utilizing property that was located approximately 110 feet below the existing facility, which eliminated the need for pumping facilities and thereby a very sustainable system with very low operating costs.

The project also included the design of new head works including a rotary screen and flow measurement equipment, a new 750,000 gallon aerated primary treatment pond, construction of 800 lineal feet of sewer collection system, and construction of concrete valve control boxes with depths ranging from 5 to 13 feet.

Services Provided by HECO Engineers:

• Master Planning
• Project Management
• Preliminary Engineering
• Construction Documents
• Construction Management
• Survey
• Civil Engineering