The original 12 million gallon per day (MGD) facility was designed by Hubbell, Roth & Clark, Inc. and placed in operation in 1988.   Construction of the South Huron Valley Wastewater Control System, including two separate sewer arms and the 12 MGD Treatment Plant, were the culmination of many years of planning.

The interceptor sewer system operated by the South Huron Valley Utility Authority includes 131,509 feet of sanitary sewer interceptors ranging in size from 12 inches to 84 inches in diameter, 9,610 feet of 36" force main, 361 manholes, one inverted siphon, 10 river crossings and several special structures.

The South Huron Valley Utility Authority consists of the following communities:

•  Brownstown Township

•  Huron Township

•  Van Buren Township

•  Flat Rock

•  Gibraltar

•  South Rockwood

•  Woodhaven

•  Romulus

Construction cost of the interceptor system and the 12 MGD treatment plant was approximately $72,000,000.   Construction funds included Federal/State Grants, an SRF Loan and community dollars.

The hydraulic capacity of the plant is 60 MGD.   The treatment capacity of the plant, as constructed in 1988, was 12 MGD through the Biological Secondary System with excess flows receiving preliminary and primary treatment and disinfection.

The current expansion of the Wastewater Plant Secondary Treatment System and Sludge Handling capability from 12 MGD to 24 MGD was placed in operation in March, 2001. HRC's scope of work for the expansion project included a study to determine the extent of the design work, design of the new and rehabilitated facilities, and construction services.

Design work included preparation of contract documents for the new Biological Treatment Tanks, Final Clarifiers, Sludge Thickeners, Sludge Storage Tanks, Return and Waste Activated Sludge Pumps, new/replacement Sludge Pumping and Mixing equipment, complete replacement of Plant Communication and Plant Control systems, upgrading of H&V controls throughout the Plant and upgrading of the Plant Odor Control System.   The design work included structural, architectural, electrical, instrumentation, civil/site, process and mechanical disciplines.

Construction cost of the plant expansion was $21,400,000. The project was constructed under the State of Michigan SRF Loan Program . The plant expansion increased the cost of the total wastewater treatment system to $94,650,000.

Construction services included bid review and assistance in preparation of project contract, shop drawing review, preparation and review of change orders and project costs, construction observation and resolution of questions and problems.