Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-10-27 — TX
Operator
Dcp Midstream, Lp
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$6,000
Incident datetime
2023-10-27 00:00 UTC
Report number
Location
TX
Narrative
On 10/4/2023 at approximately 6:15am cst a response was initiated to the cm-10 cimarron gathering line based on a low-pressure alarm received by centralized booster monitoring group. Response efforts concluded that the cm-10 line had ruptured at approximately 6:11 am. The orion volunteer fire department chose to close a rural road and evacuate 6 local homes. The line was isolated, secured, and an investigation is underway. At 4pm cst local news coverage released incident and evacuation information unknown to operator. A subsequent flow analysis calculated release volume greater than 3mmcf. Supplemental report 12/12/23 : amended part g to include results from metallurgical analyses indicating internal corrosion caused by top of the line corrosion occurring in an environment containing CO2 and water. Received the metallurgical report 11/16/23. Supplemental report 7/11/24. Added cost of the metallurgical analysis report.
Detailed record list
Report Received Date
2023-10-27 00:00:00
Iyear
2023
Report Number
20230098
Supplemental Number
39842
Report Type
Supplemental Final
Operator Id
31130
Name
Dcp Midstream, Lp
Operator Street Address
2331 Citywest Blvd. Hq-08-S812-02
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77042
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
36.2096
Location Longitude
-98.77207
Nrc Rpt Num
1380903
Additional Nrc Report Numbers
1381240
Commodity Released Type
Natural Gas
Unintentional Release
3200
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
Yes
Still Shutdown Ind
Yes
Communication State Fed Ind
Yes
Party Initiated Communication
Local/state/federal Emergency Responder
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
6
On Off Shore
Onshore
Onshore State Abbreviation
Ok
Onshore Postal Code
73838
Onshore City Name
Not Within A Municipality
Onshore County Name
Major
Designated Location
Not Applicable
Pipe Fac Name
Cm
Segment Name
Cm 10"
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
48
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Seam
Pipe Diameter
10.75
Pipe Wall Thickness
0.156
Pipe Smys
52000
Pipe Specification
Api 5lx
Pipe Seam Type
Longitudinal Erw - Unknown Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
Unknown
Installation Year
1968
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Circumferential
Rupture Length
120
Rupture Width
10
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
234
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
10240
Est Cost Intentional Release
0
Est Cost Prop Damage
6000
Est Cost Emergency
1800
Est Cost Other
8200
Est Cost Other Details
Cost Of Metallurgical Analysis.
Gas Cost In Mcf
3.2
Prpty
26240
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
6
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
751
Gas Flow In Pipe In Mcf
16959
Mop Psig
1000
Mop Cfr Section
192.619(A)(2)
Maop Established Date
2019-10-10 00:00:00
Maop Reversal Flow Ind
Bi-Directional
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
25823
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Type C Gathering
Scada In Place Ind
No
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Localized Pitting
Int Water Acid Ind
Yes
Int Metallurgical Basis Ind
Yes
Int Other Loc Ind
Yes
Corrosion Location Details
Top Of The Pipe
Corrosion Inhibitors
Yes
Corrosion Lining
No
Cleaning Dewatering
Yes
Corrosion Coupons
Yes
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
2019
Hydrtst Most Rcnt Pressure
1125
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
L**** M**
Preparer Title
Dot Specialist
Preparer Email
M************@p**.com
Preparer Telephone
405-590-5975
Local Contact Name
L**** M**
Local Contact Email
M************@p**.com
Local Contact Telephone
405-590-5975
Authorizer Name
M*** P*****
Authorizer Title
Supervisor Pipeline Regulatory
Authorizer Telephone
970-397-0732
Authorizer Email
M*************@p**.com
Narrative
On 10/4/2023 at approximately 6:15am cst a response was initiated to the cm-10 cimarron gathering line based on a low-pressure alarm received by centralized booster monitoring group. Response efforts concluded that the cm-10 line had ruptured at approximately 6:11 am. The orion volunteer fire department chose to close a rural road and evacuate 6 local homes. The line was isolated, secured, and an investigation is underway. At 4pm cst local news coverage released incident and evacuation information unknown to operator. A subsequent flow analysis calculated release volume greater than 3mmcf. Supplemental report 12/12/23 : amended part g to include results from metallurgical analyses indicating internal corrosion caused by top of the line corrosion occurring in an environment containing CO2 and water. Received the metallurgical report 11/16/23. Supplemental report 7/11/24. Added cost of the metallurgical analysis report.
| Report Received Date | 2023-10-27 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230098 |
| Supplemental Number | 39842 |
| Report Type | Supplemental Final |
| Operator Id | 31130 PHMSA Enforcement |
| Name | Dcp Midstream, Lp |
| Operator Street Address | 2331 Citywest Blvd. Hq-08-S812-02 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77042 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 36.2096 Google Maps OpenStreetMap |
| Location Longitude | -98.77207 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1380903 NRC Report How to search |
| Additional Nrc Report Numbers | 1381240 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 3200 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Still Shutdown Ind | Yes |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Local/state/federal Emergency Responder |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Valve Closure |
| Num Pub Evacuated | 6 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 73838 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Major |
| Designated Location | Not Applicable |
| Pipe Fac Name | Cm |
| Segment Name | Cm 10" |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 48 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Seam |
| Pipe Diameter | 10.75 |
| Pipe Wall Thickness | 0.156 |
| Pipe Smys | 52000 |
| Pipe Specification | Api 5lx |
| Pipe Seam Type | Longitudinal Erw - Unknown Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Unknown |
| Installation Year | 1968 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Circumferential |
| Rupture Length | 120 |
| Rupture Width | 10 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 234 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 10240 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 6000 |
| Est Cost Emergency | 1800 |
| Est Cost Other | 8200 |
| Est Cost Other Details | Cost Of Metallurgical Analysis. |
| Gas Cost In Mcf | 3.2 |
| Prpty | 26240 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 6 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 751 |
| Gas Flow In Pipe In Mcf | 16959 |
| Mop Psig | 1000 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 2019-10-10 00:00:00 |
| Maop Reversal Flow Ind | Bi-Directional |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 25823 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Type C Gathering |
| Scada In Place Ind | No |
| Accident Identifier | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| 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 | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Localized Pitting |
| Int Water Acid Ind | Yes |
| Int Metallurgical Basis Ind | Yes |
| Int Other Loc Ind | Yes |
| Corrosion Location Details | Top Of The Pipe |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | No |
| Cleaning Dewatering | Yes |
| Corrosion Coupons | Yes |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 2019 |
| Hydrtst Most Rcnt Pressure | 1125 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | L**** M** |
| Preparer Title | Dot Specialist |
| Preparer Email | M************@p**.com |
| Preparer Telephone | 405-590-5975 |
| Local Contact Name | L**** M** |
| Local Contact Email | M************@p**.com |
| Local Contact Telephone | 405-590-5975 |
| Authorizer Name | M*** P***** |
| Authorizer Title | Supervisor Pipeline Regulatory |
| Authorizer Telephone | 970-397-0732 |
| Authorizer Email | M*************@p**.com |
| Narrative | On 10/4/2023 at approximately 6:15am cst a response was initiated to the cm-10 cimarron gathering line based on a low-pressure alarm received by centralized booster monitoring group. Response efforts concluded that the cm-10 line had ruptured at approximately 6:11 am. The orion volunteer fire department chose to close a rural road and evacuate 6 local homes. The line was isolated, secured, and an investigation is underway. At 4pm cst local news coverage released incident and evacuation information unknown to operator. A subsequent flow analysis calculated release volume greater than 3mmcf. Supplemental report 12/12/23 : amended part g to include results from metallurgical analyses indicating internal corrosion caused by top of the line corrosion occurring in an environment containing CO2 and water. Received the metallurgical report 11/16/23. Supplemental report 7/11/24. Added cost of the metallurgical analysis report. |
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