As required by the Intergovernmental Agreement with Renewable Water Resources (ReWa), Parker Sewer & Fire District has implemented a 15-year program of maintenance management and rehabilitation. In continuation of this program, Parker has begun working on various lines throughout its system to address the issue of Inflow and Infiltration (I&I). Dedicated sanitary sewer system pipes are designed to carry wastewater from sinks, toilets, showers and bath drains to a wastewater treatment facility. Inflow and Infiltration occurs when excess water, typically known as stormwater and groundwater, enters into the sewer system.
As the pipes within a wastewater collection system age, many begin to crack allowing rainwater and groundwater to enter the lines and mix with sewage that flows to the wastewater treatment facilities. Even newer pipe systems can allow I&I into the system because of faulty connections installed by homeowners or plumbing contractors, as well as tree roots invading the pipeline. See Diagram A. Each pipe within the system ranges in size and has a specific capacity level for transporting wastewater to the treatment facility. The increased flow from I&I can exceed the capacity of the pipe system. This can lead to overflowing manholes which can expose the community to pollutants and waste carried in the wastewater. The excess wastewater that reaches the treatment plant must then be treated which increases the costs to ReWa, the District, and to those living in the service area.
According to the Water Environment Federation (WEF), 27% of all sanitary sewer overflows are caused by I&I. This fact has lead Parker to review its system in specific areas including Monaghan, Brandon, Judson, Dunean, Mills Mill, Union Bleachery, Welcome and San Souci. In many of these areas, the pipes are more than 100 years old and have only received minor repairs throughout the years. Parker implemented the Sanitary Sewer Evaluation Study (SSES), which consists of conducting a thorough study of the organization’s system and prioritizing specific areas in need of rehabilitation. This study is providing an inventory of the current condition of our entire pipe system. A Closed Circuit Television Camera is used to effectively maneuver through the pipes while capturing photos of obstacles, debris, offset joints and protruding service connections. Each line is monitored to verify if there is damage to the pipes and the severity of that damage to determine which rehabilitation projects should take place first and which projects could wait until later in the process.
I&I issues have increased the need for additional resources. Therefore, by conducting these rehabilitation projects in your area, Parker will reduce and control the amount of I&I and the effects it has on the overall system. While in your area, Parker Sewer and its contractors will be working in the right-of-way and also up to, and including, the property line of some residents. During this time, your service will not be disrupted.