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Pipeline Asset Management: Initial Investigative Foray into the Las Vegas Valley Water District (LVVWD) Steel Pipeline System
The LVVWD Asset Management group embarked on its initial condition assessment program for bar wrapped steel pipe. The program consists of field investigation of known problem pipes, and evaluation of pipeline critical use. This paper will discuss the first two pipeline field investigations and technologies being considered for future field assessments. The two pipe pipelines investigated are a 16-inch steel mortar lined, mortar coated pipe (MLCP) that was investigated after experiencing a leak failure (Las Vegas Boulevard and Sahara Avenue) (LVBSA), and a 36-inch steel cylinder concrete, pretensioned pipe (SCCP-PT) investigated after a routine hydrant tap attempt (Sandhill - Lamb Transmission Main Pipeline) (SLMTP). The SLMTP is a primary transmission main with a direct source of the reservoir at the LVVWD Campbell Pumping Station. Pervasive corrosion pitting on the steel cylinder and a failed cylinder reinforcing strip were discovered on the transmission main when the tap-in attempt was made in August of 2004, prompting an initial condition investigation at that location. That investigation raised a concern that there could have been a manufacturing problem in the pipe as the chloride content in the mortar lining was found to be relatively high. It was important to determine whether the system, or portions of the system were at sufficient failure risk. The data gathered from this analysis provided information needed to decide if the conditions uncovered during the initial analysis from the East Desert Inn Road near Aloha Street location were specific to that location. The additional investigations ability to alleviate concerns over the condition on the one (1) mile section as a whole resulted in only a small section of the pipeline being replaced. This resulted in a savings of approximately $2.5 million.
Pipeline Asset Management: Initial Investigative Foray into the Las Vegas Valley Water District (LVVWD) Steel Pipeline System
The LVVWD Asset Management group embarked on its initial condition assessment program for bar wrapped steel pipe. The program consists of field investigation of known problem pipes, and evaluation of pipeline critical use. This paper will discuss the first two pipeline field investigations and technologies being considered for future field assessments. The two pipe pipelines investigated are a 16-inch steel mortar lined, mortar coated pipe (MLCP) that was investigated after experiencing a leak failure (Las Vegas Boulevard and Sahara Avenue) (LVBSA), and a 36-inch steel cylinder concrete, pretensioned pipe (SCCP-PT) investigated after a routine hydrant tap attempt (Sandhill - Lamb Transmission Main Pipeline) (SLMTP). The SLMTP is a primary transmission main with a direct source of the reservoir at the LVVWD Campbell Pumping Station. Pervasive corrosion pitting on the steel cylinder and a failed cylinder reinforcing strip were discovered on the transmission main when the tap-in attempt was made in August of 2004, prompting an initial condition investigation at that location. That investigation raised a concern that there could have been a manufacturing problem in the pipe as the chloride content in the mortar lining was found to be relatively high. It was important to determine whether the system, or portions of the system were at sufficient failure risk. The data gathered from this analysis provided information needed to decide if the conditions uncovered during the initial analysis from the East Desert Inn Road near Aloha Street location were specific to that location. The additional investigations ability to alleviate concerns over the condition on the one (1) mile section as a whole resulted in only a small section of the pipeline being replaced. This resulted in a savings of approximately $2.5 million.
Pipeline Asset Management: Initial Investigative Foray into the Las Vegas Valley Water District (LVVWD) Steel Pipeline System
Ciesielski, James F. (author) / Davies, Miles (author)
International Pipelines Conference 2008 ; 2008 ; Atlanta, Georgia, United States
Pipelines 2008 ; 1-12
2008-07-17
Conference paper
Electronic Resource
English
Nevada , Infrastructure , Steel pipes , Pipelines , Costs , Assets
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