A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
10 Years of Learning—The East Boston Branch Sewer Project from Design through Construction
Mandated by the federal court-ordered Boston Harbor cleanup, the control of combined sewer overflow into Boston Harbor continues to be a primary focus of the Massachusetts Water Resources Authority (MWRA). The East Boston Branch Sewer Relief Project required nearly $90 million of design and construction to replace, relieve or rehabilitate 4.5 miles of the existing MWRA interceptor system serving East Boston. These upgrades increased the in-system storage and capacity to deliver wet weather flows. A combination of cured-in-place pipe lining, microtunneling, pipe bursting and open cut excavation methods were used to complete the upgrades. The result is a 79% reduction by volume in combined sewer overflows to Chelsea Creek and Boston's Inner Harbor. Designing and constructing a project of this size in East Boston proved to be a challenging task with its busy streets, complex system of overhead and subsurface utilities, and unique geologic history. East Boston is densely populated with a mixture of commercial properties, residential houses, as well as the busy Logan International Airport and associated support services. Coordinating construction activities with the community proved to be challenging. These issues included noise control, traffic management and pre and post construction surveys. Working in a dense urban environment made a difficult construction project even more challenging. Now that the project is complete, this paper serves as a way to look back and chronicle the project and lessons learned that can be applied to improve design and construction of future sewer rehabilitation projects. A significant amount of time was spent to develop the contract documents, and yet during construction there were major hurdles to overcome. By analyzing the hurdles and associated changes, and sharing our approach to addressing the issues, the information can be used to aid future projects. This paper will look closely at issues investigated over the life of the project from design through construction. These include risk management both planned and implemented, changes in pipe installation methods (e.g., changing from open cut to microtunneling, change from pneumatic to static pipe bursting), construction shaft locations and sizing, utility relocations, and alignment modifications during construction to facilitate construction and mitigate the court ordered schedule. The paper will also examine how the owner, the designer, and the contractor chose to make these changes, whether or not they were successful and whether changes during design could have been anticipated to address these issues differently.
10 Years of Learning—The East Boston Branch Sewer Project from Design through Construction
Mandated by the federal court-ordered Boston Harbor cleanup, the control of combined sewer overflow into Boston Harbor continues to be a primary focus of the Massachusetts Water Resources Authority (MWRA). The East Boston Branch Sewer Relief Project required nearly $90 million of design and construction to replace, relieve or rehabilitate 4.5 miles of the existing MWRA interceptor system serving East Boston. These upgrades increased the in-system storage and capacity to deliver wet weather flows. A combination of cured-in-place pipe lining, microtunneling, pipe bursting and open cut excavation methods were used to complete the upgrades. The result is a 79% reduction by volume in combined sewer overflows to Chelsea Creek and Boston's Inner Harbor. Designing and constructing a project of this size in East Boston proved to be a challenging task with its busy streets, complex system of overhead and subsurface utilities, and unique geologic history. East Boston is densely populated with a mixture of commercial properties, residential houses, as well as the busy Logan International Airport and associated support services. Coordinating construction activities with the community proved to be challenging. These issues included noise control, traffic management and pre and post construction surveys. Working in a dense urban environment made a difficult construction project even more challenging. Now that the project is complete, this paper serves as a way to look back and chronicle the project and lessons learned that can be applied to improve design and construction of future sewer rehabilitation projects. A significant amount of time was spent to develop the contract documents, and yet during construction there were major hurdles to overcome. By analyzing the hurdles and associated changes, and sharing our approach to addressing the issues, the information can be used to aid future projects. This paper will look closely at issues investigated over the life of the project from design through construction. These include risk management both planned and implemented, changes in pipe installation methods (e.g., changing from open cut to microtunneling, change from pneumatic to static pipe bursting), construction shaft locations and sizing, utility relocations, and alignment modifications during construction to facilitate construction and mitigate the court ordered schedule. The paper will also examine how the owner, the designer, and the contractor chose to make these changes, whether or not they were successful and whether changes during design could have been anticipated to address these issues differently.
10 Years of Learning—The East Boston Branch Sewer Project from Design through Construction
Lanergan, Phillip (author) / McGovern, Peter (author) / Savard, Paul (author) / McKiernan, David (author) / Hamilton, Lisa (author)
Pipelines Conference 2011 ; 2011 ; Seattle, Washington, United States
Pipelines 2011 ; 553-566
2011-07-28
Conference paper
Electronic Resource
English
Sewer construction in Boston, Mass.
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