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Mechanical Damage Prevention An SGA Web Conference Series of 5 Sessions Session 3 – Tuesday, February 20, 2007 9:30 AM to 11:30 AM CT
See the 140 slides - 2 slides per page PDF grayscale (click to download) Play the recording (click to access) The Presenters SGA is proud to have Tim Kasprzyk, Burt Williams, Timothy Vaughan, Al Jimison and Massoud Tahamtani as presenters for this session and thanks them for their participation -
Learning Objectives After attending this session the participant will -
Prior Knowlege Recommendations To get the most from attending this session the participant is recommended to have the following prior knowledge -
Session #3 started with a panel of 4 practitioners, with pipelines varying in size from long lines transmission to smaller LDCs, discussing locate, mark and excavation practices: 1. Spectra Energy receives approximately 190,000 requests for locating/marking in 23 states and monitors >2,000 excavations per year. They have a very comprehensive and active mechanical damage prevention program. Multiple lines in one location are a significant issue. Transmission, distribution and service lines may all be in one locate request and their locating and marking has to be well coordinated. 2. Columbia Gas Distribution of Va. measures “no-shows” of one call tickets which includes late marking. The purpose is to improve this metric. The Va. “One Call” law provides the marking standard for all in state utilities. Excavators who are repeat offenders are given additional education and training to reduce their damage incidents. Columbia Gas has developed and distributed “hit kits” to their field personnel for when a line is damaged. Columbia Gas has found that getting involved in local damage prevention organizations is necessary and effective in reducing hits to their system. 3. The City of Mesa Az. has specified forms for detailing a location for boring and bore monitoring. They have fully digitized their maps which then are available on computers that may be in the field in cars or trucks for in field verification, modification etc. 4. TECO Peoples Gas of Tampa Fl. receives 10,000 locate calls per day and has 60 dedicated locaters. 48% of their mechanical damages occur due to a lack of a one call. They have developed an online course in damage prevention for excavators. They have recently hired a full time employee that bills contractors for the damages they have incurred and collects the funds. Having one such individual makes the process consistent. No one else mentioned that they bill excavators for damages incurred. They have significantly reduced hits/1000 tickets and are very pleased with the states one call center. Massoud Tahamtani, Division Director of Utility Safety described Virginias’ one call law and system. It has been recognized nationally as a model system/process and some of the PIPES provisions come from the Va. experience. Va. has only one exemption to the One Call requirement and that department (DOT) has paperwork to submit that equates to a one call. The Safety Division has 3 full time trainers for >3,500 contractors. A board including all constituents determines fines etc. for not following the rules. All funds collected go back into educational activities for contractors. Va. has an extensive metrics effort. Recent analysis of that data indicates that even hand digging is causing pipe damage and they are responding with educational materials. Ground Penetrating Radar is being tried to find unmarked laterals. Va. is conducting an R&D effort to improve mapping accuracies and simplify the mapping part of the One Call process in concert with PHMSA, and PRCI. One objective is to reduce the number of unnecessary calls/locate requests. Electronic white lining will be demonstrated. More accurate GPS, cell phones and other mobile systems are being investigated to simplify and improve the locating and marking efforts. (See PHMSA R&D website for details.) Several notable issues arose: 1. Care must be used in benchmarking or comparing metrics. For example, hits/1000 locates is not equal to hits/1000 calls. Not all calls require locates. 2. There is no uniform definition of a “hit” pipe. Some require the actual pipe to be damaged, others as long as the insulation is affected, it qualifies as a hit. The industry will have difficulty in getting good results and analyses of data if definitions are not clear and uniform. DIRT should resolve such issues. 3. The locating of cathodic protection electric lines such as anode test wires, ground bed wires and rectifier lines is not uniformly requested or required of locaters. 4. Hours of operation of One Call Centers are not uniform. Some go 24/7, others do not. Successful damage prevention programs require attention to detail and an effective outreach program. Pipeline personnel must be involved in their One Call centers, local damage prevention boards etc. |