Encouraging Innovation in Locating and Characterizing Underground Utilities (2009) / Chapter Skim
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Pages 15-21
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15C H A P T E R 3 Utility Issues in Transportation ProjectsSubsurface Utility Engineering Up until the 1980s, a department of transportation (DOT) employee usually worked directly with a utility company representative to address utility issues.
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16• Limiting pavement damage during utility expansion or repair. Utility Relocations The FHWA issued a report in 2002 on avoiding utility relocations (2)
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17on 55.7% and did not request a locate on 32.3% of the incidents (4)
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18vaults, and storage areas. Wires may be encased or individually placed in common trenches.
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19Deep utilities Braided utilities that weave around each other Utilities layered on top of others Empty nonmetallic conduits Close and parallel utilities Abandoned and discontinuous utilities, and utilities in poor condition Stubs for future connections Anode beds/wires Large grounding systems Under cars and other obstructions Septic systems Material and depth variance Box 3.1. Challenging Conditions for Utility Location Inaccurate or missing records Gas and oil field gathering lines Railroad communications facilities Thrust blocks Limits of encasements Utilities under salt water Loops of wires Slag and highly conductive backfill Utilities beneath reinforcing steel No access to utilities Wooden water lines Steam lines Utilities near guardrailsmay need to make multiple trips to the same spot to survey additional marks.
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20State DOT Personnel Utility engineers Survey section Property department Traffic department Maintenance Consultants Box 3.2. Roles Related to Utilities in Transportation Projects Utility Company Personnel Records Engineering Locators Contract locators Construction inspectors Other Personnel Railroads State one-call centers, inspectors, consultants, designers Municipal GIS departments, engineers, consultants Federal agencies Military Private ownersand different accommodation policies and guidance, the responsibility for collecting and depicting utility information for transportation projects is varied.
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21and responsibilities. It is their final chance to protect their facilities and find utility changes and additions within the project location after design is complete but before construction is complete.
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