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Overview

Located in the northeastern suburbs of Atlanta, Gwinnett County, Georgia has been one of America's fastest growing counties for the past 20 years. Faced with increasing population and ever stricter environmental regulations, County officials recognized the need to manage water and wastewater services in an efficient and cost effective manner while maintaining their commitment to environmental protection. In the late 1990s, with input from concerned citizens, County officials developed a Water and Sewer Master Plan, with one of its key objectives being the consolidation of wastewater treatment facilities into regional ones. A primary goal of these efforts is to decrease the risk of hazardous discharge into the County's waterways while taking advantage of modern wastewater treatment and pumping technology.

As part of this effort, applications were made for environmental permits to build a 20 MGD advanced wastewater treatment facility in south Gwinnett County. When this was unsuccessful due to many environmental obstacles, the decision was made and permits were obtained to build the treatment plant in the northern part of the County.The chosen location was at the highest elevation in the area and in close proximity to Lake Lanier, a 38,000 acre lake formed by the Buford Dam in the nearby Chattahoochee River. This state of the art facility, the F. Wayne Hill Water Resource Center, is currently undergoing a 40 MGD expansion.

Beaver Ruin Pump Station

A key part of Gwinnett County's wastewater treatment infrastructure is the Beaver Ruin Pump Station. Designed by Jordan, Jones and Goulding, Inc. of Atlanta, GA, the station is designed to transfer raw wastewater from the Lawrenceville area to the F. Wayne Hill Water Resource Center. Due to the great distance and elevation differential between the pump station and the treatment plant, the need for high-head pumps and a suitable surge control system were critical parts of the design criteria. After receiving information and recommendations from Morris Pumps' engineers and visiting several existing installations, the decision was made to utilize Morris engineered high-head series pumping systems, with VFD controllers for variable speed operation. In addition to the gradual speed variations inherent with the VFD systems, supplemental surge control was accomplished by means of an external hydropneumatic tank and air compressor system.

Morris Pumping Systems

The high-head pumping equipment consists of four (4) horizontal base-mounted duplex pumping systems. Each duplex system includes two (2) Morris Series 7100 Type NC pumps driven by a single dual-shafted 1250 HP, 1200 RPM motor. Interconnecting system piping transfers the wastewater discharge from pump "A" directly into the suction inlet of pump "B", resulting in a combined system rating of 7,000 USGPM at 450 feet TDH. The base-mounted systems, including pumps, dual-shaft motor, couplings, interconnecting system piping and fittings were factory assembled and witness tested prior to shipment. To assure proper system design integration and single-source responsibility, Morris Pumps also furnished the VFD control equipment.

Pump Details and Additional Photos
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A part of the Grundfos Group of Companies, Yeomans Chicago Corporation is a leading manufacturer of centrifugal solids-handling pumps and equipment, including the Chicago Pump, Yeomans Pump and Morris Pumps product lines. Based in Aurora, IL, Yeomans Chicago Corporation maintains an established network of sales and service representatives serving a worldwide customer base. Yeomans