A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Implementing a Successful I&I Removal Program in Fort Lauderdale, FL
The City of Fort Lauderdale is a fully developed, coastal city in southeast Florida and highly dependent on the success of the tourism industry as the primary engine driving growth and redevelopment. The older portions of the City's existing sanitary sewage collection system, constructed primarily of vitrified clay and concrete pipe contributes to high levels of inflow and both rainfall induced (RDII) and groundwater (GWI) infiltration (I&I), pipeline failures and conveyance disruptions. A value engineering study concluded that the most cost effective means of providing needed additional wastewater treatment plant capacity was to remove I&I from both the base and peak flows to the wastewater treatment plant. The specific goal of the sewer rehabilitation program is to cost effectively reduce GWI based I&I base flows to the treatment plant currently averaging approximately 20 MGD and RDII influenced peak flows in excess of 85 MGD, to accommodate growth and redevelopment activities while not requiring additional WWTP capacity. As part of the WaterWorks 2011 infrastructure program, the City initiated a comprehensive sewer rehabilitation program using only trenchless technologies to repair the existing collection system. This paper will discuss the implementation of the sewer rehabilitation portion of the WaterWorks 2011 program and discuss the results, experiences and lessons learned. This paper provides details of the system evaluation and prioritization, the development of specific projects, experiences with projects constructed to date and the implications of system flow data obtained as projects have been completed. Evaluation of flow data indicates sharply reduced levels of RDII as evidenced by dramatic reductions in peak flows at the WWTP observed during rainfall events and reduced levels of GWI as evidenced by continually decreasing ADF at the WWTP despite the continuing addition of thousands of new service connections being added to the system as part of the Waterworks program.
Implementing a Successful I&I Removal Program in Fort Lauderdale, FL
The City of Fort Lauderdale is a fully developed, coastal city in southeast Florida and highly dependent on the success of the tourism industry as the primary engine driving growth and redevelopment. The older portions of the City's existing sanitary sewage collection system, constructed primarily of vitrified clay and concrete pipe contributes to high levels of inflow and both rainfall induced (RDII) and groundwater (GWI) infiltration (I&I), pipeline failures and conveyance disruptions. A value engineering study concluded that the most cost effective means of providing needed additional wastewater treatment plant capacity was to remove I&I from both the base and peak flows to the wastewater treatment plant. The specific goal of the sewer rehabilitation program is to cost effectively reduce GWI based I&I base flows to the treatment plant currently averaging approximately 20 MGD and RDII influenced peak flows in excess of 85 MGD, to accommodate growth and redevelopment activities while not requiring additional WWTP capacity. As part of the WaterWorks 2011 infrastructure program, the City initiated a comprehensive sewer rehabilitation program using only trenchless technologies to repair the existing collection system. This paper will discuss the implementation of the sewer rehabilitation portion of the WaterWorks 2011 program and discuss the results, experiences and lessons learned. This paper provides details of the system evaluation and prioritization, the development of specific projects, experiences with projects constructed to date and the implications of system flow data obtained as projects have been completed. Evaluation of flow data indicates sharply reduced levels of RDII as evidenced by dramatic reductions in peak flows at the WWTP observed during rainfall events and reduced levels of GWI as evidenced by continually decreasing ADF at the WWTP despite the continuing addition of thousands of new service connections being added to the system as part of the Waterworks program.
Implementing a Successful I&I Removal Program in Fort Lauderdale, FL
Schwarz, Walt (author)
Pipelines Specialty Conference 2009 ; 2009 ; San Diego, California, United States
Pipelines 2009 ; 731-740
2009-08-12
Conference paper
Electronic Resource
English
Implementing a Successful I&I Removal Program in Fort Lauderdale, Fl
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