LOWER NORTH TYGER RIVER WASTE WATER TREATMENT PLANT
SPARTANBURG SANITARY SEWER DISTRICT – 2.5 MGD
SPARTANBURG, SOUTH CAROLINA
Chandler Construction Services, Inc. completed Phase II of the Lower North Tyger River WWTP in early 2004. Contract included clearing and grading, layout, structural steel, concrete structures, building finishes, mechanical and equipment installation, process piping, yard piping, sewer, domestic water, storm drain, roadways, fine grading, grassing and system start-up.
Structures built by CCS on this project included three splitter boxes, two valve vaults, bar screen and grit chamber, 2.5-million gallon carrousel, two 60-foot diameter digesters, waste loading station, parshall flume, ultraviolet disinfector with shelter, as well as an influent and return sludge pump buildings. The miscellaneous items associated with these structures included metal and concrete stairs, ladders, handrails, gratings, doors and windows, equipment pads and embeds.

During construction, CSS was faced with ongoing weather-related challenges. The unusual amount of rainfall at the site combined with the low elevation and proximity to the river resulted in the water table rising above the designed finished floor elevations in several structures. Construction techniques were modified as facility redesign warranted.

The installation of 1,900 LF of 36” DIP effluent line and the accompanying HDPE diffuser presented an unexpected construction challenge when the Tyger River grew in width from 15 feet to 45 feet across due to unseasonably high precipitation. Logs and mats were brought in for bedding, and filter fabric, stone and dry dirt were hauled in to stabilize an access road and facilitate the delivery of equipment and materials to the river.
The river was temporarily diverted to safely and successfully set the diffuser in the riverbed. Diverting the river included the installation of a porta-dam and placing several open-ended cargo boxes to reduce erosion rates.

Project scheduling, planning and execution remained fluid throughout construction of the LNTR Wastewater Treatment Plant. CCS worked alongside the engineer and adapted to the changing conditions of the site and needs of the owner.