Horse Creek Wastewater Pollution Control Facility
Aiken, South Carolina – Construction has commenced on upgrades to the Horse Creek Pollution Control Facility, operated by the Aiken County Public Service Authority. Improvements to the aging 1970s facility were needed for the facility to comply with new discharge limits into the Savannah River. GMC completed a study of upgrade options which provided a primary design capacity of 26 million gallons per day (MGD) with a peak of 65 MGD and a secondary capacity of 20 MGD with a peak of 40 MGD, utilizing a 20-million-gallon offline equalization basin. The design includes modifications to Pump Station #1, along with a new parallel 42-inch force main, as well as modifications to the headworks and primary clarifiers. Upgrades to the biological process consist of three new oxidation ditches with designated areas for nutrient removal (nitrogen). Pump Station #3 includes one vertical turbine aerated sewage pump and five of the return activated sludge which are being replaced. The reuse water system will be improved to reduce surges and water hammer. Electrical improvements will be made throughout the facility, including a new 3 megawatt generator and multiple medium voltage switches and unit substations. Site and process lighting will also be updated to enhance energy efficiency. Brasfield & Gorrie is the construction manager for the project.
Thompson’s Station Elementary and Middle School
Thompson’s Station, Tennessee – Thompson’s Station Elementary and Middle School is the second K-8 school designed by GMC for Williamson County Schools. Located just south of Nashville in Thompson’s Station, the new school will open its doors for the 2018-19 academic year and will help accommodate the district’s rapid growth. The footprint marries an elementary and middle school with a connecting spine between two major classroom wings and an auxiliary wing. There are 68 classrooms and four special needs classrooms, along with art, speech, computer, resource, band, music, science and flex classrooms. The center spine houses a media center, art labs and flexible classroom spaces for teacher training, testing and collaborative learning. Two grand staircases connect the two-story academic wings and the atrium space, which serves as the pre-function area for the auxiliary wing. The auxiliary wing encompasses an auditorium, middle and elementary gyms, separate cafeterias with a shared kitchen, and separate media centers with a shared circulation desk and can be accessed separately from the main building for use after hours.
MidCreeks Mitigation Bank
Barbour County, Alabama – Land management practices related to timber farming and agriculture had significantly impacted wetland and stream functions of the 730-acre MidCreeks Mitigation Bank. Straight lining of the streams degraded the system and decreased stability along stream banks, increasing erosion. Sediment and associated agricultural pollutants were being transported downstream and negatively affecting water quality. An excessive number of ditches had been installed to decrease the amount of time the property was covered by water for higher pine plantation yield. Transitioning the former bottomland hardwood system to row crops and pine stands had eliminated native wildlife and species diversity. GMC Environmental and Headwaters, a GMC subsidiary, are restoring the wetlands and reestablishing stable streams on the site, thereby eliminating associated pollutants and enhancing downstream water quality. The restoration of 414.59 acres of bottomland hardwood forest and the restoration, enhancement and preservation of approximately 38,229 linear feet of streams are invaluable to water quality, wetland and stream function and wildlife habitat and species diversity. To date, 225.58 acres of wetlands have been restored, including clearing pine trees, plugging ditches to restore hydrology and planting more than 90,000 native bottomland hardwood trees. Riparian buffer restoration has been conducted on 6,357 linear feet of stream, and most recently, 3,400 linear feet of in-stream channel was restored.
Columbia County Gateway Boulevard Extension
Columbia County, Georgia – Columbia County hired GMC to design a 1.5 mile roadway extension through undeveloped land that will begin at the current terminus of the existing Gateway Boulevard in Grovetown, Georgia and extend to Wrightsboro Road. Approximately 0.5 miles of the project will be an extension of the existing four-lane divided highway section, which will end at a roundabout. The remaining approximate one mile from the roundabout to Wrightsboro Road will be a two-lane section with a raised median. The completed roadway is planned to serve as the primary corridor for a new mixed-use development in Columbia County. GMC assisted Columbia County Economic Development (CCED) with the development of this original master plan and is currently providing support consultation to CCED as they seek prospective developers. GMC is providing civil, lighting, landscape and irrigation design, in addition to overall project management, environmental delineations, geotechnical investigations, traffic studies and construction administration for the Gateway Boulevard extension project.