Overview
Timmons Group is providing design, bidding, and construction administration services for a sewer collection system in Middlesex County that will deliver public sewer access to four service areas: Topping, Saluda, Deltaville, and Hartfield. Middlesex County will own and maintain the low-pressure sewer collection systems within these service areas, while HRSD will own and maintain the two regional pump stations and interceptor force mains located in Topping and Deltaville. As a result, the project is being designed to meet both Middlesex County and HRSD standards.
Topping Wastewater Collection System – Phase 1
This project involves the design of a new sewer collection system to serve approximately 772 campground sites of the Topping Service Area in Middlesex County, Virginia.
- Gravity Collection System: The design includes approximately 670 linear feet (LF) of 8-inch PVC piping, four 4-foot diameter manholes, and a flow metering manhole. The gravity collection system will be owned and maintained by the County.
- Low-Pressure Collection System: The design includes approximately 150 LF of 3-inch and 250 LF of 4-inch HDPE force main. This system will also be owned and maintained by the County.
- Pump Station: The pump station design includes duplex submersible pumps, a 12’ x 20’ precast concrete control building with a restroom, a 7-foot diameter wet well, an 8’ x 8’ precast concrete valve vault, and an 8’ x 8’ precast concrete instrumentation vault with a magnetic flow meter. Since HRSD will own and operate the pump station, it is designed to meet HRSD standards.
- Interceptor Force Main: The design includes approximately 16,600 LF of 6-inch HDPE force main. As the interceptor will be owned and operated by HRSD, the design complies with HRSD standards.
Saluda Wastewater Collection System
This project involves the design of a new sewer collection system to serve approximately 153 residential connections, 7 commercial properties, a middle school, and a healthcare facility in the Saluda Service Area of Middlesex County, Virginia.
- Low-Pressure Force Mains: The design includes approximately 4,200 LF of 2-inch, 3,800 LF of 3-inch, and 1,200 LF of 4-inch HDPE force main. The low-pressure force mains will ultimately connect to an HRSD interceptor force main.
Deltaville Wastewater Collection System – Phases 1, 2, and 3
This project involves the design of a new sewer collection system to serve approximately 690 total connections in the Deltaville Service Area in Middlesex County, Virginia.
- Low-Pressure Collection System: The design includes approximately 5,500 LF of 2-inch, 35,000 LF of 3-inch, 26,000 LF of 4-inch, 10,000 LF of 6-inch, and 5,500 LF of 8-inch HDPE force main. This system will be owned and maintained by the County.
- Pump Station: The pump station design includes duplex submersible pumps, a 12’ x 20’ precast concrete control building with a restroom, a 7-foot diameter wet well, an 8’ x 8’ precast concrete valve vault, and an 8’ x 8’ precast concrete instrumentation vault with a magnetic flow meter. As the pump station will be owned and operated by HRSD, the design complies with HRSD standards.
- Interceptor Force Main: The design includes approximately 3,500 LF of 6-inch HDPE force main. Since the interceptor will be owned and operated by HRSD, it is designed in accordance with HRSD standards.
