# NTSB Safety Recommendation P-73-028 **Citation:** P-73-028 **Type / status:** guidance / guidance **Agency:** National Transportation Safety Board **Effective:** 1973-06-18 **Published:** 1973-06-18 THE NTSB RECOMMENDS THAT: THE AMERICAN GAS ASSOCIATION AND THE INDEPENDENT NATURAL GAS ASSOCIATION OF AMERICA DESIGN A STANDARD GAS PIPELINE MARKER THAT CAN BE UTILIZED BY ALL GAS PIPELINE OPERATORS TO MARK THE LOCATION OF THEIR TRANSMISSION PIPELINES. ## Document text NTSB safety recommendation P-73-028. THE NTSB RECOMMENDS THAT: THE AMERICAN GAS ASSOCIATION AND THE INDEPENDENT NATURAL GAS ASSOCIATION OF AMERICA DESIGN A STANDARD GAS PIPELINE MARKER THAT CAN BE UTILIZED BY ALL GAS PIPELINE OPERATORS TO MARK THE LOCATION OF THEIR TRANSMISSION PIPELINES. Priority: CLASS II Overall Status: Closed--No Longer Applicable Issued Date: 1973-06-18 Adopted Date: 1973-06-07 Overall Date Closed: 1987-01-12 Synopsis: "SPECIAL STUDY - PREVENTION OF DAMAGE TO PIPELINES." THIS SPECIAL STUDY CONCERNS DAMAGE TO GAS AND LIQUID PIPELINES CAUSED BY EXCAVATION AND CONSTRUCTION ACTIVITIES, INCLUDING BLASTING. Ntsbnumber: 80571 Report Number: PSS-73-01 Addressee Name: American Gas Association Addressee Status: Closed--No Longer Applicable Addressee Date Closed: 1987-01-12 Addressee Acronym: AGA Addressee Organization Type: A-Associations Communication Date: 1974-01-08 Communication Type: Official Correspondence Communication Contents: AGA LETTER: CONSIDERING THE RECOMMENDATION IN DETAIL, HAD RESPONDED TO OPS PROPOSED RULEMAKING ON MARKING AND HAD NO OBJECTION TO A STANDARD MARKER. ASME GAS PIPING STANDARDS COMMITTEE AND THE PIPELINE COMMITTEE OF THE AGA OPERATING SECTION ARE ALSO CONSIDERING DEVELOPMENT OF A STANDARD MARKER. 11/16/79 - AGA LTR: THE COORDI NATING GROUP FOR PIPELINE SAFETY ON BEHALF OF THE ASSOCIATION'S MEMBER COMPANIES PREVIOUSLY INDICATED THAT THERE WAS NO OBJECTION TO A 'STANDARD' PIPELINE MARKER DESIGN. Addressee Acronym: AGA Addressee Organization Type: A-Associations Communication Date: 1987-01-12 Communication Type: Official Correspondence Communication Contents: THIS IS ACTUALLY A FOLLOWUP AND THE FOLLOWING IS A HISTORY OF PAST CORRESPONDENCE. AGA'S NOVEMBER 16, 1979, LETTER, AND NTSB'S FOLLOWUP LETTER OF FEBRUARY 14, 1980. Addressee Acronym: AGA Addressee Organization Type: A-Associations Communication Date: 1980-02-14 Communication Type: Official Correspondence Addressee Acronym: AGA Addressee Organization Type: A-Associations Communication Date: 1987-01-12 Communication Type: Official Correspondence Addressee Name: Independent Natural Gas Association of America Addressee Status: Closed--No Longer Applicable Addressee Date Closed: 1987-01-12 Addressee Organization Type: A-Associations Communication Date: 1974-01-08 Communication Type: Official Correspondence Addressee Organization Type: A-Associations Communication Date: 1980-02-14 Communication Type: Official Correspondence ## Provenance - Official: Yes - Source: - Source ID: `ntsb-pipeline` - SHA-256: `cd48dd46e85dd9cbc3b9fa2890dcc366d9eff1ee005fa340d8580333abcfe38e` - Retrieved: 2026-08-20T04:57:24.741Z - Exported: 2026-08-23T13:23:15.595Z - Document slug: `ntsb-recommendation-p-73-028` ### Source metadata ```json { "recordKind": "ntsb_safety_recommendation", "safetyRecommendationNumber": "P-73-028", "recommendationMode": "Pipeline", "topicMode": "Pipeline", "ntsbNumber": "80571", "priority": "CLASS II", "overallStatus": "Closed--No Longer Applicable", "overallStatusAcronym": "CNLA", "overallDateClosed": "1987-01-12", "lastModifiedDate": "2016-11-15", "reportNumber": "PSS-73-01", "reportUrl": "https://www.ntsb.gov/investigations/Pages/80571.aspx", "transmittalLetterUrl": "http://www.ntsb.gov/safety/safety-recs/recletters/P73_12_28.pdf", "addressees": [ { "addresseeName": "American Gas Association", "addresseeStatusAcronym": "CNLA", "addresseeStatus": "Closed--No Longer Applicable", "addresseeDateClosed": "1987-01-12", "addresseeDetails": [ { "addresseeAcronym": "AGA", "addresseeOrganizationType": "A-Associations", "isFromNtsb": false, "communicationDate": "1974-01-08", "communicationType": "Official Correspondence", "communicationContents": "AGA LETTER: CONSIDERING THE RECOMMENDATION IN DETAIL, HAD RESPONDED TO OPS PROPOSED RULEMAKING ON MARKING AND HAD NO OBJECTION TO A STANDARD MARKER. ASME GAS PIPING STANDARDS COMMITTEE AND THE PIPELINE COMMITTEE OF THE AGA OPERATING SECTION ARE ALSO CONSIDERING DEVELOPMENT OF A STANDARD MARKER. 11/16/79 - AGA LTR: THE COORDI NATING GROUP FOR PIPELINE SAFETY ON BEHALF OF THE ASSOCIATION'S MEMBER COMPANIES PREVIOUSLY INDICATED THAT THERE WAS NO OBJECTION TO A 'STANDARD' PIPELINE MARKER DESIGN." }, { "addresseeAcronym": "AGA", "addresseeOrganizationType": "A-Associations", "isFromNtsb": false, "communicationDate": "1987-01-12", "communicationType": "Official Correspondence", "communicationContents": "THIS IS ACTUALLY A FOLLOWUP AND THE FOLLOWING IS A HISTORY OF PAST CORRESPONDENCE. AGA'S NOVEMBER 16, 1979, LETTER, AND NTSB'S FOLLOWUP LETTER OF FEBRUARY 14, 1980." }, { "addresseeAcronym": "AGA", "addresseeOrganizationType": "A-Associations", "isFromNtsb": true, "communicationDate": "1980-02-14", "communicationType": "Official Correspondence", "communicationContents": "" }, { "addresseeAcronym": "AGA", "addresseeOrganizationType": "A-Associations", "isFromNtsb": true, "communicationDate": "1987-01-12", "communicationType": "Official Correspondence", "communicationContents": "" } ] }, { "addresseeName": "Independent Natural Gas Association of America", "addresseeStatusAcronym": "CNLA", "addresseeStatus": "Closed--No Longer Applicable", "addresseeDateClosed": "1987-01-12", "addresseeDetails": [ { "addresseeAcronym": null, "addresseeOrganizationType": "A-Associations", "isFromNtsb": false, "communicationDate": "1974-01-08", "communicationType": "Official Correspondence", "communicationContents": "" }, { "addresseeAcronym": null, "addresseeOrganizationType": "A-Associations", "isFromNtsb": true, "communicationDate": "1980-02-14", "communicationType": "Official Correspondence", "communicationContents": "" } ] } ], "jurisdiction": "US" } ```