{"operation":"document","citation":"P-70-033","title":"NTSB Safety Recommendation P-70-033","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1970-10-14","effective_on":"1970-10-14","summary":"THE NTSB RECOMMENDS THAT ALL STATES, THE DISTRICT OF COLUMBIA, AND PUERTO RICO TAKE THE FOLLOWING ACTION: CONSIDER THE ENACTMENT OF LEGISLATION TO REQUIRE: (1) PERSONS PLANNING TO EXCAVATE OR BLAST TO NOTIFY THE GAS UTILITY OPERATING IN THE AREA AND (2) LOCAL AUTHORITIES AND OTHERS WHO ISSUE CONSTRUCTION PERMITS TO COOPERATE WITH THE GAS UTILITIES TO FACILITATE THE OBTAINING OF NOTICES OF PROPOSED EXCAVATION.","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-70-033.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-70-033.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-70-033","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-70-033","body":"NTSB safety recommendation P-70-033.\n\nTHE NTSB RECOMMENDS THAT ALL STATES, THE DISTRICT OF COLUMBIA, AND PUERTO RICO TAKE THE FOLLOWING ACTION: CONSIDER THE ENACTMENT OF LEGISLATION TO REQUIRE: (1) PERSONS PLANNING TO EXCAVATE OR BLAST TO NOTIFY THE GAS UTILITY OPERATING IN THE AREA AND (2) LOCAL AUTHORITIES AND OTHERS WHO ISSUE CONSTRUCTION PERMITS TO COOPERATE WITH THE GAS UTILITIES TO FACILITATE THE OBTAINING OF NOTICES OF PROPOSED EXCAVATION.\n\nPriority: CLASS II\n\nOverall Status: Closed--No Longer Applicable\n\nIssued Date: 1970-10-14\n\nAdopted Date: 1970-10-14\n\nOverall Date Closed: 1976-07-20\n\nSynopsis: ON NOVEMBER 6, 1969, DURING A HIGHWAY CONSTRUCTION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.\n\nProbable Cause: The probable cause of the fires in the houses was the continued overpressure condition of the low-pressure distributions system for an extended period of time, which allowed pressure to build up until high gas flames ignited nearby objects. The initiation of the overpressure was caused by a bulldozer which damaged the largest primary working regulator which, with other regulators, controlled the gas pressure entering the low-pressure systems; and by inadequate performance of the monitoring regulator which failed to operate to limit the gas pressure to a safe level.\n\nNtsbnumber: DCA70MP001\n\nReport Number: PAR-70-01\n\nAddressee Name: State of Wyoming\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of West Virginia\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Washington\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: Commonwealth of Virginia\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Vermont\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Utah\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Texas\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Tennessee\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of South Dakota\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of South Carolina\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Rhode Island\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: Commonwealth of Pennsylvania\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Oregon\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Oklahoma\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Ohio\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of North Dakota\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of North Carolina\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of New York\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of New Mexico\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of New Jersey\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of New Hampshire\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Nevada\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Nebraska\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Montana\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Missouri\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Mississippi\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Minnesota\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Michigan\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: Commonwealth of Massachusetts\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Maryland\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Maine\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Louisiana\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: Commonwealth of Kentucky\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Kansas\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Iowa\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Indiana\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Illinois\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Idaho\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Hawaii\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Georgia\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Florida\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Delaware\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Connecticut\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Colorado\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of California\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Arkansas\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Arizona\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Alaska\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: State of Alabama\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: Commonwealth of Puerto Rico\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20\n\nAddressee Name: District of Columbia\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1976-07-20","truncated":false,"body_characters":8080}