# NTSB Safety Recommendation P-73-027

**Citation:** P-73-027  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective:** 1973-06-18  
**Published:** 1973-06-18

THE NTSB RECOMMENDS THAT: THE AMERICAN GENERAL CONTRACTORS OF AMERICA AND THE INTERNATIONAL UNION OF OPERATING ENGINEERS DEVELOP GUIDELINES TO BE USED BY CONTRACTORS AND MACHINE OPERATORS PRIOR TO AND DURING CONSTRUCTION, WITH EMPHASIS ON PREVENTION OF DAMAGE TO UNDERGROUND FACILITIES.

## Document text

NTSB safety recommendation P-73-027.

THE NTSB RECOMMENDS THAT: THE AMERICAN GENERAL CONTRACTORS OF AMERICA AND THE INTERNATIONAL UNION OF OPERATING ENGINEERS DEVELOP GUIDELINES TO BE USED BY CONTRACTORS AND MACHINE OPERATORS PRIOR TO AND DURING CONSTRUCTION, WITH EMPHASIS ON PREVENTION OF DAMAGE TO UNDERGROUND FACILITIES.

Priority: CLASS II

Overall Status: Closed--No Longer Applicable

Issued Date: 1973-06-18

Adopted Date: 1973-06-07

Overall Date Closed: 1979-06-21

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: International Union of Operating Engineers

Addressee Status: Closed--No Longer Applicable

Addressee Date Closed: 1979-06-21

Addressee Acronym: IUOE

Addressee Organization Type: U-Union

Communication Date: 1979-06-21

Communication Type: Official Correspondence

Addressee Name: Associated General Contractors of America

Addressee Status: Closed--No Longer Applicable

Addressee Date Closed: 1979-06-21

Addressee Acronym: AGC

Addressee Organization Type: A-Associations

Communication Date: 1979-06-21

Communication Type: Official Correspondence

## Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-73-027>
- Source ID: `ntsb-pipeline`
- SHA-256: `0c8adebdefe33c4b1442da370f1fe4b29a992e50ad886d5b51202d4fc656be92`
- Retrieved: 2026-08-20T04:57:24.741Z
- Exported: 2026-08-25T23:25:32.227Z
- Document slug: `ntsb-recommendation-p-73-027`

### Source metadata

```json
{
  "recordKind": "ntsb_safety_recommendation",
  "safetyRecommendationNumber": "P-73-027",
  "recommendationMode": "Pipeline",
  "topicMode": "Pipeline",
  "ntsbNumber": "80571",
  "priority": "CLASS II",
  "overallStatus": "Closed--No Longer Applicable",
  "overallStatusAcronym": "CNLA",
  "overallDateClosed": "1979-06-21",
  "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": "International Union of Operating Engineers",
      "addresseeStatusAcronym": "CNLA",
      "addresseeStatus": "Closed--No Longer Applicable",
      "addresseeDateClosed": "1979-06-21",
      "addresseeDetails": [
        {
          "addresseeAcronym": "IUOE",
          "addresseeOrganizationType": "U-Union",
          "isFromNtsb": true,
          "communicationDate": "1979-06-21",
          "communicationType": "Official Correspondence",
          "communicationContents": ""
        }
      ]
    },
    {
      "addresseeName": "Associated General Contractors of America",
      "addresseeStatusAcronym": "CNLA",
      "addresseeStatus": "Closed--No Longer Applicable",
      "addresseeDateClosed": "1979-06-21",
      "addresseeDetails": [
        {
          "addresseeAcronym": "AGC",
          "addresseeOrganizationType": "A-Associations",
          "isFromNtsb": true,
          "communicationDate": "1979-06-21",
          "communicationType": "Official Correspondence",
          "communicationContents": ""
        }
      ]
    }
  ],
  "jurisdiction": "US"
}
```