Hampstead WWTP Effluent Force Main
The Hampstead Wastewater Treatment Plant Effluent Force Main project is comprised of planning, designing, and providing construction phase services for a new pipeline to convey a portion of the effluent flow from the Hampstead Wastewater Treatment Plant (WWTP) to a new discharge point.
As part of an effort to reduce the impacts of high effluent temperatures to wildlife, Carroll County undertook an effort to re-direct a portion of the WWTP effluent away from the existing Piney Run stream discharge to a new discharge on Deep Run stream.
In addition to lessening the impact of high effluent flows by spreading the flows over two (2) separate discharge points, the portion being re-directed to Deep Run will also be combined with flow from an existing groundwater remediation system that currently pulls groundwater from the former Black & Decker site in South Hampstead, aerates it, and then discharges it to a pond.
By combining the effluent with the groundwater remediation flow, the overall temperature will be reduced during the summer months when the high WWTP effluent temperatures are problematic.
In order to accomplish this, the effluent will first be pumped through a 5,900 LF 12-inch diameter effluent force main to a new manhole constructed over existing drainage piping on the former Black & Decker property where it will mix with the groundwater remediation flow and then flow via 1,400 LF of 15-inch diameter gravity piping to the new Deep Run outfall.
Project-specific features include five (5) sections to be installed via trenchless methods (jack and bore, directional drill) for crossing CSX Railroad, Maryland Business Route 30 (SHA), two local streets, and a business entrance with frequent tractor-trailer traffic plus multiple utility crossings and a stream crossing as well as coordinating with the current owner of the former Black & Decker property to connect to the groundwater remediation flow.
Other typical project items include site investigation, utility locating, permitting, environmental assessments, maintenance of traffic, surveying, easement plats, erosion & sediment control, and geotechnical investigation.