Sanitary Collection & Stormwater Systems

Stormwater System
The stormwater system collects and conveys rain water and snow melt. The system consists of catch basins, manholes, curbs, retention/detention ponds, and piping.

Purpose
  • Identify facilities that need to be upgraded or repaired
  • Implement improvements to the existing infrastructure in a manner that protects and improves the water quality
  • Provide a functional and reliable stormwater system that provides adequate drainage
Tasks
  • Investigating drainage concerns
  • Maintaining the system
  • Performing storm-system infrastructure improvements

Water Pollution & Flooding
Remember, everything put into the stormwater system will end up in a stream. Grass clippings, leaves, oil, and other substances will cause water pollution that endangers the environment. They can also create dams that interfere with the proper flow of the stream, which results in flooding of private property. Please do not use catch basins as disposal units.

Wastewater
Wastewater comes from  water usage in kitchens, bathrooms and commercial and industrial processes. Some of the flow that makes up the wastewater comes from extraneous sources, such as groundwater and rainwater entering through cracks in sewer mains.

Sanitary Sewer System
Water that is used in a home or business flows through the interior plumbing system and enters a sewer lateral where it flows into the public sanitary sewer system. There are more than 110 miles of sanitary sewer mains in the City of Lebanon. Sewer mains in Lebanon range in diameter from 6 inches to 36 inches.

Pump Stations
Though most of the flow travels by gravity to the Glosser Road Pump Station, some low-lying areas require pumping. Lebanon has seven such pump stations. All flow is sent to the Wastewater Treatment Plant (WWTP) from the Glosser Road Pump Station via a 20-inch force main. A portion of the flow reaches the WWTP through the Turtle Creek Pump Station that serves the industrial area.

Flow Equalization Tank
During excessively wet periods, enough groundwater gets into the sewer mains that the amount of flow arriving at the Glosser Road Pump Station exceeds the pumping capacity of the station. To handle this excess flow, a 4 million-gallon flow equalization tank was constructed to contain it. As the flow rate decreases to normal daily flow rates, water is pumped back from the tank to the pump station.

Preventive Maintenance
The Collection System Division performs preventive maintenance and responds to emergency overflows and back ups. Preventive maintenance includes cleaning the sanitary sewer mains and removing roots and built-up grease that could create a sanitary sewer overflow or sewage back up into a house. The division also uses closed-circuit television to inspect the condition of the sanitary and storm sewers.