A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Atlanta's SSES and Integrated Sewer Rehabilitation Selection Process
Paper One noted, along with several other requirements, that the FACD includes a task to evaluate and rehabilitate the City of Atlanta's sanitary system. This paper — Paper Two — provides an overview of the City's approach to Sewer System Evaluation Surveys (SSES) and the Rehabilitation Selection process within the terms of the consent decrees. The mission of the SSES and Rehabilitation Selection Task is to establish a comprehensive and accurate inventory of the assets of the City's wastewater system; to identify sources of inflow and infiltration within the system and to perform a condition assessment of wastewater system assets, incorporating sewers, manholes and laterals. The City's wastewater system has been conveniently split into six sewer groups for the purposes of demarcating areas of the City to be studied over the 14 year period of the FACD. With the findings from this study an appropriate prioritized list is scheduled of sewers, manholes and laterals identified for remedial action. This procedure will be repeated for each of the six sewer groups in turn with the intention of implementing the work in a timely, low impact and cost effective manner. Reporting requirements include the submission of a report to EPA/EPD at the conclusion of each of the six SSES studies. Although not a prerequisite of the FACD nevertheless a decision was taken by the City of Atlanta at the time the consent decrees were signed in 1999, that in order to address the widespread problem of spills — which, as outlined in Paper One, amounts to over 550 SSOs (unpermitted discharges and spills to dry land) annually — that the entire public sewer system would be targeted for evaluation, i.e., 100% internal sewer condition assessment and 100% internal manhole condition assessment. The paper discusses the process involved in synthesizing the huge volume of data arising from the SSES study through an in-depth QA/QC process ensuring that the data is complete, accurate, reasonable and exhibits full connectivity prior to upload to the GIS hub — see Paper Three — before being relayed in turn to the Hydraulic Modeling Group — see Paper Four — for micro-modeling analysis prior to the commencement of the Rehab Selection Process. The Rehabilitation Selection Process, using a specially developed GIS web-based tool, is reviewed in the paper. The tool integrates survey data, rehabilitation methodologies, sewer hydraulic modeling data and associated rehabilitation cost estimates. This allows program design engineers to efficiently determine suitable rehabilitation designs for each element of the system. To date, the tool has been used to generate sewer and manhole rehabilitation designs for just over 10% of the system. For the portion of the system evaluated thus far, various trenchless technologies have been identified as the appropriate solution for a significant percentage of the rehabilitation. High utilization of trenchless technologies is targeted for use throughout the program to provide cost effective system upgrade and at the same time minimal disruption to the community.
Atlanta's SSES and Integrated Sewer Rehabilitation Selection Process
Paper One noted, along with several other requirements, that the FACD includes a task to evaluate and rehabilitate the City of Atlanta's sanitary system. This paper — Paper Two — provides an overview of the City's approach to Sewer System Evaluation Surveys (SSES) and the Rehabilitation Selection process within the terms of the consent decrees. The mission of the SSES and Rehabilitation Selection Task is to establish a comprehensive and accurate inventory of the assets of the City's wastewater system; to identify sources of inflow and infiltration within the system and to perform a condition assessment of wastewater system assets, incorporating sewers, manholes and laterals. The City's wastewater system has been conveniently split into six sewer groups for the purposes of demarcating areas of the City to be studied over the 14 year period of the FACD. With the findings from this study an appropriate prioritized list is scheduled of sewers, manholes and laterals identified for remedial action. This procedure will be repeated for each of the six sewer groups in turn with the intention of implementing the work in a timely, low impact and cost effective manner. Reporting requirements include the submission of a report to EPA/EPD at the conclusion of each of the six SSES studies. Although not a prerequisite of the FACD nevertheless a decision was taken by the City of Atlanta at the time the consent decrees were signed in 1999, that in order to address the widespread problem of spills — which, as outlined in Paper One, amounts to over 550 SSOs (unpermitted discharges and spills to dry land) annually — that the entire public sewer system would be targeted for evaluation, i.e., 100% internal sewer condition assessment and 100% internal manhole condition assessment. The paper discusses the process involved in synthesizing the huge volume of data arising from the SSES study through an in-depth QA/QC process ensuring that the data is complete, accurate, reasonable and exhibits full connectivity prior to upload to the GIS hub — see Paper Three — before being relayed in turn to the Hydraulic Modeling Group — see Paper Four — for micro-modeling analysis prior to the commencement of the Rehab Selection Process. The Rehabilitation Selection Process, using a specially developed GIS web-based tool, is reviewed in the paper. The tool integrates survey data, rehabilitation methodologies, sewer hydraulic modeling data and associated rehabilitation cost estimates. This allows program design engineers to efficiently determine suitable rehabilitation designs for each element of the system. To date, the tool has been used to generate sewer and manhole rehabilitation designs for just over 10% of the system. For the portion of the system evaluated thus far, various trenchless technologies have been identified as the appropriate solution for a significant percentage of the rehabilitation. High utilization of trenchless technologies is targeted for use throughout the program to provide cost effective system upgrade and at the same time minimal disruption to the community.
Atlanta's SSES and Integrated Sewer Rehabilitation Selection Process
Hutchinson, R. E. (author) / El-Sayegh, H. K. (author) / Chambers, L. (author)
International Conference on Pipeline Engineering and Construction ; 2007 ; Boston, Massachusetts, United States
Pipelines 2007 ; 1-12
2007-07-06
Conference paper
Electronic Resource
English
Risk management , Pipes , Sewers , Trenchless technology , Rehabilitation , Georgia , Linings , Pipelines
Outline of SSES Study and Rehabilitation Selection Process
| British Library Conference Proceedings | 2007
Atlanta's Consent Decrees Drive a Substantial Commitment to Trenchless Sewer Rehabilitation
| British Library Conference Proceedings | 2007
Use of GIS-Based SSES to Eliminate Sewer System Overflows
| Online Contents | 1994
| British Library Conference Proceedings | 1998
| British Library Conference Proceedings | 2012