A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A 72-Inch Water Pipeline through a Developed Neighborhood: A Design and Construction Challenge — Allen/Plano/Frisco/McKinney Project A 72-Inch Pipeline
In 1998 it was determined the population growth rate in the service area of the North Texas Municipal Water District's (NTMWD) North System would eclipse the population and demand projections. It was decided an additional parallel transmission line was needed to serve the increased demands of the region. The first parallel line needed was a 72-inch transmission line approximately seven miles in length through mostly developed subdivisions and crossing under two major highways, State Highway 121 and US-75. State Highway 121 is currently being widened to a six-lane highway with frontage roads and US-75 is currently a six-lane highway with frontage roads. Multiple routes were considered for the construction of the Allen/Plano/Frisco/McKinney 72-inch Pipeline. The route chosen had the most impacts to existing roadways, highways, utilities and subdivisions. Even with the number of impacts, it was chosen because it was the shortest and most economical route. The route is along the median of Exchange Parkway in the City of Allen which currently is a four-lane divided roadway with a future six-lane section at build out. The pipeline was constructed under the two major highways within a 90-inch tunnel totaling 1250 feet. The SH 121 crossing was especially challenging because it crossed under five, six foot by nine foot multiple box culverts and was located under a 16 foot high retaining wall at a bridge approach for the main lanes of State Highway 121. The pipeline was split in two bid packages, Phase I and Phase II. The first phase was bid in the fall of 2004 and was awarded at $13,197,000 and the second phase was bid in the fall of 2005 at a cost of $8,813,000. This paper discusses the methodology used in the pipeline route selection process and the design and construction issues associated with construction of a large diameter pipeline in a highly urban setting.
A 72-Inch Water Pipeline through a Developed Neighborhood: A Design and Construction Challenge — Allen/Plano/Frisco/McKinney Project A 72-Inch Pipeline
In 1998 it was determined the population growth rate in the service area of the North Texas Municipal Water District's (NTMWD) North System would eclipse the population and demand projections. It was decided an additional parallel transmission line was needed to serve the increased demands of the region. The first parallel line needed was a 72-inch transmission line approximately seven miles in length through mostly developed subdivisions and crossing under two major highways, State Highway 121 and US-75. State Highway 121 is currently being widened to a six-lane highway with frontage roads and US-75 is currently a six-lane highway with frontage roads. Multiple routes were considered for the construction of the Allen/Plano/Frisco/McKinney 72-inch Pipeline. The route chosen had the most impacts to existing roadways, highways, utilities and subdivisions. Even with the number of impacts, it was chosen because it was the shortest and most economical route. The route is along the median of Exchange Parkway in the City of Allen which currently is a four-lane divided roadway with a future six-lane section at build out. The pipeline was constructed under the two major highways within a 90-inch tunnel totaling 1250 feet. The SH 121 crossing was especially challenging because it crossed under five, six foot by nine foot multiple box culverts and was located under a 16 foot high retaining wall at a bridge approach for the main lanes of State Highway 121. The pipeline was split in two bid packages, Phase I and Phase II. The first phase was bid in the fall of 2004 and was awarded at $13,197,000 and the second phase was bid in the fall of 2005 at a cost of $8,813,000. This paper discusses the methodology used in the pipeline route selection process and the design and construction issues associated with construction of a large diameter pipeline in a highly urban setting.
A 72-Inch Water Pipeline through a Developed Neighborhood: A Design and Construction Challenge — Allen/Plano/Frisco/McKinney Project A 72-Inch Pipeline
Johnson, Kevin R. (author) / Coltharp, Brian C. (author) / Schiffman, Olin (author)
Pipeline Division Specialty Conference 2006 ; 2006 ; Chicago, Illinois, United States
Pipelines 2006 ; 1-8
2006-07-28
Conference paper
Electronic Resource
English
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