# NTSB Safety Recommendation P-74-009

**Citation:** P-74-009  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective:** 1974-02-07  
**Published:** 1974-02-07

THE NTSB RECOMMENDS THAT THE UGI CORPORATION: DEVELOP LIAISON, BEFORE AND DURING CONSTRUCTION, WITH THE CONTRACTOR AND OTHER PARTIES AFFECTED BY CONSTRUCTION. AS PART OF THIS LIAISON, UGI SHOULD FULLY INFORM THE CONTRACTOR AND THE OTHER PARTIES OF EMERGENCY PROCEDURES AND SHOULD BE FULLY INFORMED OF THE DAILY PROGRESS OF CONSTRUCTION.

## Document text

NTSB safety recommendation P-74-009.

THE NTSB RECOMMENDS THAT THE UGI CORPORATION: DEVELOP LIAISON, BEFORE AND DURING CONSTRUCTION, WITH THE CONTRACTOR AND OTHER PARTIES AFFECTED BY CONSTRUCTION. AS PART OF THIS LIAISON, UGI SHOULD FULLY INFORM THE CONTRACTOR AND THE OTHER PARTIES OF EMERGENCY PROCEDURES AND SHOULD BE FULLY INFORMED OF THE DAILY PROGRESS OF CONSTRUCTION.

Priority: CLASS II

Overall Status: Closed - Acceptable Action

Issued Date: 1974-02-07

Adopted Date: 1974-02-07

Overall Date Closed: 1976-09-10

Synopsis: IN COOPERSBURG, PA., ON FEBRUARY 21, 1973, A GAS PIPELINE WAS RUPTURED BY DYNAMITE AND GAS AT 50 PSIG ENTERED AN APARTMENT HOUSE AND EXPLODED. FIVE PERSONS WERE KILLED, 16 PERSONS WERE INJURED, AND 2 BUILDINGS WERE DESTROYED.

Ntsbnumber: PLD73XR003

Report Number: PAR-74-01

Addressee Name: UGI Corporation

Addressee Status: Closed--No Longer Applicable

Addressee Date Closed: 1976-09-10

Addressee Organization Type: P-Private Industry

Communication Date: 1974-12-31

Communication Type: Official Correspondence

Communication Contents: LETTER FROM UGI CORPORATION: BOTH OF THESE HAVE BEEN INCLUDED IN A COMPREHENSIVE 'SUBSTRUCTURE DAMAGE PREVENTION MANUAL' WHICH HAS BEEN ADOPTED BY UGI. THIS MANUAL IS A FORMALIZATION OF THE HISTORIC METHODS WE HAVE USED IN AN ATTEMPT TO PREVENT DAMAGE TO OUR FACILITIES. SPECIFICALLY, SECTION 2.1 REFERS TO P-74-8 AND SECTION 4.1 THROUGH 4.4 REFERS TO P-74-9. CORRESPONDENCE DOCUMENTATION INCOMPLETE.

## Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-74-009>
- Source ID: `ntsb-pipeline`
- SHA-256: `3620568fccfeeaffe36937e53e55d4414f7af21f73fe19c8f6985d20e49455d7`
- Retrieved: 2026-08-20T04:57:24.741Z
- Exported: 2026-08-24T06:44:05.740Z
- Document slug: `ntsb-recommendation-p-74-009`

### Source metadata

```json
{
  "recordKind": "ntsb_safety_recommendation",
  "safetyRecommendationNumber": "P-74-009",
  "recommendationMode": "Pipeline",
  "topicMode": "Pipeline",
  "ntsbNumber": "PLD73XR003",
  "priority": "CLASS II",
  "overallStatus": "Closed - Acceptable Action",
  "overallStatusAcronym": "CAA",
  "overallDateClosed": "1976-09-10",
  "lastModifiedDate": "2016-11-15",
  "reportNumber": "PAR-74-01",
  "reportUrl": "https://www.ntsb.gov/investigations/Pages/PLD73XR003.aspx",
  "transmittalLetterUrl": "http://www.ntsb.gov/safety/safety-recs/recletters/P74_1_9.pdf",
  "addressees": [
    {
      "addresseeName": "UGI Corporation",
      "addresseeStatusAcronym": "CNLA",
      "addresseeStatus": "Closed--No Longer Applicable",
      "addresseeDateClosed": "1976-09-10",
      "addresseeDetails": [
        {
          "addresseeAcronym": null,
          "addresseeOrganizationType": "P-Private Industry",
          "isFromNtsb": false,
          "communicationDate": "1974-12-31",
          "communicationType": "Official Correspondence",
          "communicationContents": "LETTER FROM UGI CORPORATION: BOTH OF THESE HAVE BEEN INCLUDED IN A COMPREHENSIVE 'SUBSTRUCTURE DAMAGE PREVENTION MANUAL' WHICH HAS BEEN ADOPTED BY UGI. THIS MANUAL IS A FORMALIZATION OF THE HISTORIC METHODS WE HAVE USED IN AN ATTEMPT TO PREVENT DAMAGE TO OUR FACILITIES. SPECIFICALLY, SECTION 2.1 REFERS TO P-74-8 AND SECTION 4.1 THROUGH 4.4 REFERS TO P-74-9. CORRESPONDENCE DOCUMENTATION INCOMPLETE."
        }
      ]
    }
  ],
  "jurisdiction": "US"
}
```