Skip Ribbon Commands
Skip to main content
Safety Recommendation Details

Safety Recommendation P-77-040
Details
Synopsis: ON JANUARY 25, 1977, A LOW-ORDER EXPLOSION AND FIRE DESTROYED A HOUSE IN A RESIDENTIAL AREA NEAR WILLIAMSPORT, PENNSYLVANIA; THE OCCUPANT WAS NOT SERIOUSLY INJURED BY THE EXPLOSION.
Recommendation: VERIFY THE LOCATION OF ALL HIGH-PRESSURE SHUTOFF VALVES SHOWN ON GAS MAIN ATLASES AND CHANGE MAPS WHERE NECESSARY.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Pipeline
Location: Williamsport, PA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA77MP011
Accident Reports:
Pennsylvania Gas and Water Company, Natural Gas Explosions
Report #: PAR-77-04
Accident Date: 1/25/1977
Issue Date: 12/9/1977
Date Closed: 9/22/1986
Addressee(s) and Addressee Status: Pennsylvania Gas and Water Company (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: Pennsylvania Gas and Water Company
To: NTSB
Date: 9/22/1986
Response: THIS IS ACTUALLY A FOLLOWUP AND THE FOLLOWING IS A HISTORY OF PAST CORRESPONDENCE. NTSB'S DECEMBER 2, 1977 LETTER RE QUESTING INFORMATION ON THE IMPLEMENTATION OF RECOMMENDA TIONS. PENNSYLVANIA GAS LETTER OF DECEMBER 15, 1977. PENN SYLVANIA GAS LETTER OF JANUARY 16, 1978. PENNSYLVANIA GAS LETTER OF MAY 25, 1978. NTSB LETTER OF DECEMBER 15, 1978. PENNSYLVANIA GAS LETTER OF SEPTEMBER 19, 1979. NTSB LETTER OF OCTOBER 29, 1979. NTSB LETTER OF DECEMBER 5, 1979.

From: NTSB
To: Pennsylvania Gas and Water Company
Date: 9/22/1986
Response:

From: NTSB
To: Pennsylvania Gas and Water Company
Date: 10/29/1979
Response:

From: Pennsylvania Gas and Water Company
To: NTSB
Date: 1/16/1978
Response: PENNSYLVANIA GAS AND WATER COMPANY LTR: THE PENNSYLVANIA GAS AND WATER COMPANY CANNOT AGREE TO YOUR PROPOSAL TO "VERIFY THE LOCATION OF ALL HIGH PRESSURE SHUTOFF VALVES SHOWN ON GAS MAIN ATLASES". MOST OF THE VALVES IN OUR SYSTEM WERE INSTALLED PRIMARILY TO FACILITATE CONSTRUCTION AND NOT AS EMERGENCY SYSTEM CONTROL VALVES. AS A RESULT, MOST OF THE VALVES ARE BURIED AND NOT IN ROADWAY COVERS. TO "VERIFY THE LOCATION" WOULD REQUIRE DIGGING UP MUNICIPAL STREETS ALL OVER THE SYSTEM FOR NO APPARENT COST-BENEFIT ADVANTAGE. THE PENNSYLVANIA GAS AND WATER COMPANY DOES NOT FEEL THIS SPECIFIC REQUEST IS CONSISTENT WITH THE INTENT OF THE PIPELINE SAFETY ACT. 9/19/79 - PENNSYLVANIA GAS AND WATER COMPANY LTR IN RESPONSE TO NTSB 12/15/78 FOLLOWUP LETTER: WE HAVE UNDER TAKEN A PROGRAM TO IDENTIFY AND VERIFY THE LOCATION OF ALL VALVES INSTALLED THAT WERE INTENDED TO BE USED FOR THE PURPOSE OF EMERGENCY SHUTOFF. ONCE VERIFIED, THE LOCATION OF THESE VALVES WILL BE IDENTIFIED IN RECORDS MADE AVAILABLE TO FIELD PERSONNEL FOR THEIR USE IN LOCATING THESE VALVES IF THE NEED FOR THEIR USE SHOULD ARISE.