The HCWA Sewerage System
The Georgia Association of Water Professionals (GAWP) selected the Henry County Water Authority (HCWA) as the 2009 Collection System of the Year, an award that places the utility atop the list of the very best systems in the state of Georgia. In addition, the Authority's Indian Creek Water Reclamation Facility received the Plant of the Year award for 2009 and 2010 from GAWP. The Walnut Creek Wastewater Laboratory won the Wastewater Laboratory of the year award in 2009. The Gold and Platinum Award for 100% permit compliance has been won by Springdale N.P.D.E.S. and L.A.S. plants for 2008, 2009 and 2010. Indian Creek and Walnut Creek L.A.S. also won the Gold Award for 2009 and 2010. These awards reflect standards of excellence evident at the facilities and within the operations of the HCWA.
The Springdale Road facility, which was constructed in 1994, has a 2.0-million-gallons-per-day (MGD) treatment capacity. The Springdale facility also has a 13.2 million gallon (MG) treated wastewater holding pond, as well as 2,066 spray heads, which spray treated wastewater onto 185 acres of protected green space, referred to as a land application system (LAS). The Little Cotton Indian interceptor will pick up any additional sewage from the Springdale facility, in excess of 2.0 MGD, and transfer it for treatment at the Walnut Creek plant.
The Bear Creek facility, constructed in 1997 and expanded in 2009, has a rated treatment capacity of 1.25 MGD. Bear Creek Las facility has 230 wetted acres, a 2.4 MG and a 14 MG holding pond, for a total of 16.4 MGs. That treated wastewater is land applied through 1,360 spray heads. The Bear Creek facility serves the utility’s largest commercial account the Atlanta Motor Speedway. In addition, Bear Creek now handles the wastewater treatment that was processed at the Authority's old Hampton Industrial Park facility.
The Indian Creek Water Reclamation Facility came online in November of 2001. Phase I of the facility provides the HCWA with 1.5 MGD of wastewater treatment capacity. Indian Creek sprays treated wastewater on 213 acres, has an 18 MG treated wastewater holding pond, and 1,329 spray heads. In addition, the facility already has the necessary pipes and tanks to accommodate a 3.0 MGD expansion. All the Authority will need to do to access this additional capacity is install necessary plant equipment. Ultimately, the Indian Creek facility, when built out, will have the capability of treating 12 MGD, so the Authority is poised to handle additional consumer demand that is expected through the next decade and beyond.
The Walnut Creek Water Reclamation Facility has been called "the backbone of the sewerage system" in Henry County. The facility is the largest facility of the HCWA sewer operations. Recently expanded, it currently offers 8 MGD of wastewater treatment capacity. The Walnut Creek Facility utilizes approximately 1,040 acres of forested land to spray the treated wastewater from two holding ponds having a total storage volume of approximately 80 Million Gallons. The treated wastewater is land applied with irrigation using over 8,000 spray heads. A new ATAD digester (Autothermal Thermophilic Aerobic Digester) is now being employed to produce a reduced sludge volume, pathogen free, and class “A” bio-solid that has many environmental friendly uses. The Walnut Creek facility also houses the HCWSA laboratory for sewerage system quality control, as well as the Authority’s sewerage system departmental offices.
Collection and Conveyance
The HCWA wastewater collection and conveyance system consists of 32 wastewater lift stations and approximately 400 miles of collection sewers. The collection and conveyance system uses a range from 8-inch to 42-inch sewer lines. Trunk sewers, the largest lines, are made out of reinforced concrete or ductile iron pipes, while a percentage of the smaller collector sewers are made of PVC pipe.
Approximately one-third of the sewers in the HCWA system are 20 years old or older, but the Authority has an aggressive capital improvement program for renewal and replacement of assets as needed. The HCWA collection and conveyance system also has standby pumps and auxiliary generators for safe operation even in the event of emergencies, such as electrical power outages.
All of the Authority's sewer lines are designed for sanitary sewage, and they are inspected on a rotating basis, annually, meaning every line is tested at least every two years. The HCWA sewer line inspection process involves visual manhole inspection and closed circuit TV inspections of existing lines. Air testing, TV and visual manhole inspections are conducted on new lines. Trouble spots in the HCWA sewerage system are identified through flow meters and increased maintenance inspections.