Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2010-01-12 — MO
Operator
Laclede Gas Co
Cause
Other Outside Force Damage
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$93,802
Incident datetime
2010-01-12 12:00
Report number
Location
MO, ST LOUIS
Narrative
A 2-inch steel natural gas main was exposed in an excavation by a contractor preparing to install a water main on december 16, 2009 . The 2-inch line was connected to a 2-inch valve just beyond the excavation. The excavation was quickly backfilled the same day it was excavated. In the days following the backfill, heavy rain saturated the area and filled the voids created by the recent excavation with moisture. This was quickly followed by extremely cold temperatures. A leak was reeorted by the public in the area of the december 16 excavation, on january 12, 2010. During repair the main remained active in order to maintain service to customers. On january 13, 2010, it was estimated that the cost of repair and the released natural gas would exceed $50,000. A notification was then made to the national response center while natural gas was still being being released and repairs were on-going. The body of the 2-inch valve at the flange was found cracked on january 14, 2010, from soil stress. Repair crews estimated the depth of frost in the previously excavated area to be 30-inches and the frost depth outside of this area to be 12 to 18 inches. Apparently the frozen soil expansion caused the failure as the break originated from pressure pushing downward on the main.
Detailed record list
Occurred At
2010-01-12 12:00:00
Year
2010
Report Received Date
2010-10-21 00:00:00
Iyear
2010.0
Report Number
20100087.0
Supplemental Number
15877.0
Report Type
Supplemental Final
Operator Id
11032
Name
Laclede Gas Co
Operator Street Address
700 Market Street
Operator City Name
Saint Louis
Operator State Abbreviation
MO
Operator Postal Code
63101
Local Datetime
2010-01-12 11:40:00
Location Street Address
1829 Dunn Road
Location City Name
Spanish Lake
Location County Name
St Louis
Location State Abbreviation
MO
Location Postal Code
63138
Location Latitude
38.77112
Location Longitude
-90.22929
Nrc Rpt Datetime
2010-01-13 11:55:00
Nrc Rpt Num
928453
Commodity Released Type
Natural Gas
Unintentional Release
5747.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Incident Identified Datetime
2010-01-12 12:00:00
On Site Datetime
2010-01-12 12:25:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Other
System Part Details
Valve
Installation Year
1963.0
Material Involved
Other
Material Details
Cast Steel
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
93802.0
Est Cost Emergency
0.0
Est Cost Other
0.0
Est Cost Unintentional Release
36225.0
Prpty
130027.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
0.0
Accident Psig
200.0
Normal Psig
200.0
Mop Psig
300.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
No
Accident Identifier
Notification From Public
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Outside Force Damage
Cause Details
Other Outside Force Damage
Outside Force Type
Other Outside Force Damage
Osf Other Details
Loose Compaction Created By An Excavation 27 Days Prior To Failure Combined With Severe Wet, Then Cold Weather, Led To Extreme Force Being Exerted On The Pipeline.
Preparer Name
M*** D L*****
Preparer Title
Superintendent Of Maintenance Engineering
Preparer Email
M******@l*********.com
Preparer Telephone
3146585413
Preparer Fax
3145355075
Authorizer Name
C**** R H********
Authorizer Title
Assistant Vp Engineering And Field Services
Authorizer Telephone
3146585410
Authorizer Email
C*********@l*********.com
Narrative
A 2-inch steel natural gas main was exposed in an excavation by a contractor preparing to install a water main on december 16, 2009 . The 2-inch line was connected to a 2-inch valve just beyond the excavation. The excavation was quickly backfilled the same day it was excavated. In the days following the backfill, heavy rain saturated the area and filled the voids created by the recent excavation with moisture. This was quickly followed by extremely cold temperatures. A leak was reeorted by the public in the area of the december 16 excavation, on january 12, 2010. During repair the main remained active in order to maintain service to customers. On january 13, 2010, it was estimated that the cost of repair and the released natural gas would exceed $50,000. A notification was then made to the national response center while natural gas was still being being released and repairs were on-going. The body of the 2-inch valve at the flange was found cracked on january 14, 2010, from soil stress. Repair crews estimated the depth of frost in the previously excavated area to be 30-inches and the frost depth outside of this area to be 12 to 18 inches. Apparently the frozen soil expansion caused the failure as the break originated from pressure pushing downward on the main.
| Occurred At | 2010-01-12 12:00:00 |
|---|---|
| Year | 2010 |
| Report Received Date | 2010-10-21 00:00:00 |
| Iyear | 2010.0 |
| Report Number | 20100087.0 |
| Supplemental Number | 15877.0 |
| Report Type | Supplemental Final |
| Operator Id | 11032 PHMSA Enforcement |
| Name | Laclede Gas Co |
| Operator Street Address | 700 Market Street |
| Operator City Name | Saint Louis |
| Operator State Abbreviation | MO |
| Operator Postal Code | 63101 |
| Local Datetime | 2010-01-12 11:40:00 |
| Location Street Address | 1829 Dunn Road |
| Location City Name | Spanish Lake |
| Location County Name | St Louis |
| Location State Abbreviation | MO |
| Location Postal Code | 63138 |
| Location Latitude | 38.77112 Google Maps OpenStreetMap |
| Location Longitude | -90.22929 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2010-01-13 11:55:00 |
| Nrc Rpt Num | 928453 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 5747.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Incident Identified Datetime | 2010-01-12 12:00:00 |
| On Site Datetime | 2010-01-12 12:25:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Other |
| System Part Details | Valve |
| Installation Year | 1963.0 |
| Material Involved | Other |
| Material Details | Cast Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 93802.0 |
| Est Cost Emergency | 0.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 36225.0 |
| Prpty | 130027.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Accident Psig | 200.0 |
| Normal Psig | 200.0 |
| Mop Psig | 300.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Public |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Outside Force Damage |
| Cause Details | Other Outside Force Damage |
| Outside Force Type | Other Outside Force Damage |
| Osf Other Details | Loose Compaction Created By An Excavation 27 Days Prior To Failure Combined With Severe Wet, Then Cold Weather, Led To Extreme Force Being Exerted On The Pipeline. |
| Preparer Name | M*** D L***** |
| Preparer Title | Superintendent Of Maintenance Engineering |
| Preparer Email | M******@l*********.com |
| Preparer Telephone | 3146585413 |
| Preparer Fax | 3145355075 |
| Authorizer Name | C**** R H******** |
| Authorizer Title | Assistant Vp Engineering And Field Services |
| Authorizer Telephone | 3146585410 |
| Authorizer Email | C*********@l*********.com |
| Narrative | A 2-inch steel natural gas main was exposed in an excavation by a contractor preparing to install a water main on december 16, 2009 . The 2-inch line was connected to a 2-inch valve just beyond the excavation. The excavation was quickly backfilled the same day it was excavated. In the days following the backfill, heavy rain saturated the area and filled the voids created by the recent excavation with moisture. This was quickly followed by extremely cold temperatures. A leak was reeorted by the public in the area of the december 16 excavation, on january 12, 2010. During repair the main remained active in order to maintain service to customers. On january 13, 2010, it was estimated that the cost of repair and the released natural gas would exceed $50,000. A notification was then made to the national response center while natural gas was still being being released and repairs were on-going. The body of the 2-inch valve at the flange was found cracked on january 14, 2010, from soil stress. Repair crews estimated the depth of frost in the previously excavated area to be 30-inches and the frost depth outside of this area to be 12 to 18 inches. Apparently the frozen soil expansion caused the failure as the break originated from pressure pushing downward on the main. |
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