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Safety Recommendation Details

Safety Recommendation P-70-029
Details
Synopsis: ON NOVEMBER 6, 1969, DURING A HIGHWAY CONSTRUCTION PROJECT IN BURLINGTON, IOWA, A BULLDOZER WEIGHING 70,000 POUNDS DROVE OVER AND PARTIALLY COLLAPSED THE STEEL COVERS OF A GAS REGULATOR PIT, DAMAGING THE REGULATOR. WHILE THE PRESSURE WAS PARTIALLY CONTROLLED BY A MONITORING OR SAFETY REGULATOR, GAS, REPORTEDLY AT FOUR TO FIVE TIMES THE NORMAL OPERATING PRESSURE, ENTERED THE DISTRIBUTION SYSTEM. GAS CUSTOMERS IN THE AFFECTED AREA STARTED REPORTING HIGH GAS PILOTS AND FIRES TO ISU AND THE FIRE DEPARTMENT. THE HIGH-PRESSURE GAS SOURCE WAS TURNED OFF BUT FIRES CONTINUED TO BE REPORTED, THE FIRES WROUGHT MAJOR DAMAGE TO THE INTERIORS OF 10 HOUSES AND MINOR DAMAGE TO KITCHENS AND APPLIANCES IN 42 OTHERS. PROPERTY DAMAGE WAS ESTIMATED AT $80,000.
Recommendation: THE NTSB RECOMMENDS THAT THE OFFICE OF PIPELINE SAFETY OF THE DEPARTMENT OF TRANSPORTATION TAKE THE FOLLOWING ACTIONS: REQUIRE IN THE MINIMUM FEDERAL SAFETY STANDARDS THAT EACH GAS UTILITY ESTABLISH A PROGRAM FOR THE PREVENTION OF CONSTRUCTION-ORIGINATED DAMAGE TO ITS UNDERGROUND FACILITIES. THIS PROGRAM SHOULD CONTAIN PROVISIONS: (1) FOR EDUCATION AND GENERAL LIAISON WITH CONTRACTORS AND THEIR MACHINE OPERATORS; (2) FOR OBTAINING NOTICES OF CONSTRUCTION WORK IN CLOSE PROXIMITY TO UNDERGROUND GAS FACILITIES; (3) TO INSURE THAT GAS FACILITIES ARE MARKED OR OTHERWISE PROTECTED DURING SUCH CONSTRUCTION WORK; AND (4) TO FOLLOWUP AND INVESTIGATE ACCIDENTS WHICH DO OCCUR, TO DETERMINE WHERE THE PROGRAM FAILED AND HOW IT CAN BE STRENGTHENED.
Original recommendation transmittal letter: PDF
Overall Status: Closed--No Longer Applicable
Mode: Pipeline
Location: Burlington, IA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA70MP001
Accident Reports:
Low Pressure Natural Gas Distribution System
Report #: PAR-70-01
Accident Date: 11/6/1969
Issue Date: 10/14/1970
Date Closed: 9/10/1976
Addressee(s) and Addressee Status: RSPA (Closed--No Longer Applicable)
Keyword(s): Excavation, Training and Education

Safety Recommendation History
From: NTSB
To: RSPA
Date: 7/17/1971
Response: