Automatic source timeline19 miles offshore MS River Delta, LATimeline updated 6 Sept 2026

Crude Oil Release: Main Pass, LA

NOAA initial notification: “On November 16, 2023, at 9:10 am local, a crude oil leak was reported to the NRC. The report came from Third Coast Midstream Pipeline company. Oil sheen on water was observed around 0900. The leak location is thought to be 19 miles offshore of the Mississippi River Delta. An […]”[1]

Follow the timeline Latest included source reportOriginal sources (7)

Latest included source report

Posted 9 Apr 2024

Latest source report

“PRESS RELEASE | April 8, 2024 FINAL UPDATE: Unified Command completes successful integrity test of MPOG pipeline U.S. Coast Guard Heartland Office: 504-671-2020 Cell: 618-225-9008 NEW ORLEANS — The Unified Command successfully completed a line integrity test on the Main Pass Oil Gathering (MPOG) company's pipeline system Friday, near Plaquemines Parish, southeast of New […]” Current outcome is not independently verified by seahazards.[7]

NOAA report chronology

7 dated source records · 16 Nov 2023 to 9 Apr 2024
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NOAA incident record opened

Initial notification excerpt: “On November 16, 2023, at 9:10 am local, a crude oil leak was reported to the NRC. The report came from Third Coast Midstream Pipeline company. Oil sheen on water was observed around 0900. The leak location is thought to be 19 miles offshore of the Mississippi River Delta. An overflight at 1400 CST reported a slick that was 3-4 miles wide, with dark oil scattered throughout. A NOAA ship working in the area also reported the slick. The USCG requested trajectory information and resources at risk. The Coast Guard, Main Pass Oil Gathering Company, LLC and the Louisiana Oil Spill Coordinator's Office established a Unified Command in response to a crude oil release in the Gulf of Mexico near the […]”

NOAA approximate incident area; not a vessel track

Initial incident area only. Dates are NOAA postings, not a vessel track. Playback advances every 5 seconds.

Milestone 1 of 7: 16 Nov 2023. NOAA incident record opened. NOAA approximate incident area; not a vessel track

  1. NOAA incident record opened

    Initial notification excerpt: “On November 16, 2023, at 9:10 am local, a crude oil leak was reported to the NRC. The report came from Third Coast Midstream Pipeline company. Oil sheen on water was observed around 0900. The leak location is thought to be 19 miles offshore of the Mississippi River Delta. An overflight at 1400 CST reported a slick that was 3-4 miles wide, with dark oil scattered throughout. A NOAA ship working in the area also reported the slick. The USCG requested trajectory information and resources at risk. The Coast Guard, Main Pass Oil Gathering Company, LLC and the Louisiana Oil Spill Coordinator's Office established a Unified Command in response to a crude oil release in the Gulf of Mexico near the […]”

    NOAA approximate incident area; not a vessel track (29.297°, -88.718°)

    NOAA Office of Response and Restoration

  2. USCG Press release

    Source report excerpt: “11/17/2023 PHOTO AVAILABLE: Unified Command responds to oil discharge near Main Pass, LA U.S. Coast Guard Heartland Office: 504-671-2020 Cell: 618-225-9008 NEW ORLEANS — The Coast Guard, Main Pass Oil Gathering Company, LLC and the Louisiana Oil Spill Coordinator's Office established a Unified Command in response to a crude oil release in the Gulf of Mexico near the Main Pass Oil Gathering (MPOG) company's pipeline system close to Plaquemines Parish, southeast of New Orleans, Louisiana, Thursday. An overflight by an MPOG aircrew confirmed the presence of crude oil. MPOG is implementing its federal and state approved emergency oil spill response plan. MPOG has organized response resources […]”

    NOAA IncidentNews · source report archive

  3. USCG Press Release

    Source report excerpt: “| Nov. 20, 2023 UPDATE 1: Unified Command monitors, responds to MPOG11015 incident U.S. Coast Guard Heartland Office: 504-671-2020 Cell: 618-225-9008 NEW ORLEANS – The Unified Command continues to monitor and respond to an oil discharge near the Main Pass Oil Gathering (MPOG) company's pipeline system, known as the MPOG11015 incident, near Plaquemines Parish, southeast of New Orleans. The Unified Command conducted multiple overflights Friday and Saturday. Overflight teams observed visible oil Friday moving southwest away from the Louisiana shore. Three skimming vessels are working to recover oil on the surface. On Saturday and Sunday, overflights observed intermittent surface sheens. […]”

    NOAA IncidentNews · source report archive

  4. USCG press release

    Source report excerpt: “PRESS RELEASE | Nov. 28, 2023 UPDATE 3: Unified Command monitors, responds to Gulf oil incident U.S. Coast Guard Heartland Office: 504-671-2020 Cell: 618-225-9008 NEW ORLEANS – The Unified Command continues to monitor and respond to an oil discharge near the Main Pass Oil Gathering (MPOG) company's pipeline system, known as the MPOG 11015 incident, near Plaquemines Parish, southeast of New Orleans. The cause and source of the incident remain under investigation. Overflights conducted November 20 to date have observed no new oil from the suspected release. Recent wildlife and shoreline assessments identified no wildlife or shoreline impacts. Remotely operated vehicles (ROVs) and divers are […]”

    NOAA IncidentNews · source report archive

  5. ORR weekly Story

    Source report excerpt: “OR&R Provides Scientific Support to U.S. Coast Guard for Oil Spill off Louisiana Coast DEC. 4, 2023 — On November 16, 2023, OR&R and U.S. Coast Guard (USCG) response teams activated as reports came in regarding a leak in a pipeline in the Gulf of Mexico, off the coast of Plaquemines Parish, Louisiana. The source of the leak was reported to be at least 19 miles offshore of the Mississippi River Delta, near the pipeline system of Main Pass Oil Gathering, LLC (MPOG). A Main Pass Oil Gathering Company, LLC helicopter aircrew spotted crude oil during an overflight near Main Pass, Louisiana, November 16, 2023. (Courtesy photo by Main Pass Oil Gathering Company, LLC) In response to the crude oil […]”

    NOAA IncidentNews · source report archive

  6. Press release #4

    Source report excerpt: “PRESS RELEASE | Dec. 5, 2023 UPDATE 4: Unified Command monitors, responds to Gulf oil incident U.S. Coast Guard Heartland Office: 504-671-2020 Cell: 618-225-9008 NEW ORLEANS — The Unified Command continues to monitor and respond to an oil discharge near the Main Pass Oil Gathering (MPOG) company's pipeline system, known as the MPOG 11015 incident, near Plaquemines Parish, southeast of New Orleans. The cause and source of the incident remain under investigation. The entire length of the main pipeline has been assessed to date, along with 22.16 miles of surrounding pipelines with no damage or indications of a leak identified. Remotely operated vehicles (ROVs) and divers continue to reassess […]”

    NOAA IncidentNews · source report archive

  7. Final UC Update: Pipeline Integrity Test Complete

    Source report excerpt: “PRESS RELEASE | April 8, 2024 FINAL UPDATE: Unified Command completes successful integrity test of MPOG pipeline U.S. Coast Guard Heartland Office: 504-671-2020 Cell: 618-225-9008 NEW ORLEANS — The Unified Command successfully completed a line integrity test on the Main Pass Oil Gathering (MPOG) company's pipeline system Friday, near Plaquemines Parish, southeast of New Orleans. Following a successful line integrity test of the MPOG line, the Unified Command has stood down its work to respond to the oil release observed on November 16. MPOG and the Unified Command identified a failed subsea connector on the MPOG line that did not hold pressure after conducting an integrity test of that […]”

    NOAA IncidentNews · source report archive
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Details in the record

Source record
NOAA IncidentNews 10692[1]
Dated source updates
6[2][3][4][5][6][7]

Reading this account

Automatically assembled from NOAA's incident record and substantive Public Affairs or Situation Update posts. Dates are NOAA posting dates, which can differ from when events happened or original reports were published. Excerpts retain the source's wording and uncertainty. This account does not independently establish the cause, current outcome or safety of the area. NOAA coverage is selective; missing updates do not mean nothing happened. The map shows one approximate incident area, not a vessel track.

These are excerpts from the source, not independently verified conclusions. Publication order can differ from the sequence of events. Follow the source links for the complete reports.

Original sources

Timeline updated 6 Sept 2026. New reports and changes to this NOAA incident are incorporated automatically; this is not a live incident feed.

  1. 1.Crude Oil Release: Main Pass, LA ↗NOAA Office of Response and Restoration · 16 Nov 2023
  2. 2.USCG Press release ↗NOAA IncidentNews · source report archive · 17 Nov 2023
  3. 3.USCG Press Release ↗NOAA IncidentNews · source report archive · 20 Nov 2023
  4. 4.USCG press release ↗NOAA IncidentNews · source report archive · 28 Nov 2023
  5. 5.ORR weekly Story ↗NOAA IncidentNews · source report archive · 4 Dec 2023
  6. 6.Press release #4 ↗NOAA IncidentNews · source report archive · 6 Dec 2023
  7. 7.Final UC Update: Pipeline Integrity Test Complete ↗NOAA IncidentNews · source report archive · 9 Apr 2024

Related records in our archive

Original source text, preserved separately from this account.

NOAAORR-10692 NOAA response record
Crude Oil Release: Main Pass, LA.
19 miles offshore MS River Delta, LA.
1. On November 16, 2023, at 9:10 am local, a crude oil leak was reported to the NRC. The report came from Third Coast Midstream Pipeline company. Oil sheen on water was observed around 0900. The leak location is thought to be 19 miles offshore of the Mississippi River Delta. An overflight at 1400 CST reported a slick that was 3-4 miles wide, with dark oil scattered throughout. A NOAA ship working in the area also reported the slick. The USCG requested trajectory information and resources at risk. The Coast Guard, Main Pass Oil Gathering Company, LLC and the Louisiana Oil Spill Coordinator's Office established a Unified Command in response to a crude oil release in the Gulf of Mexico near the Main Pass Oil Gathering (MPOG) company's pipeline system close to Plaquemines Parish, southeast of New Orleans, Louisiana, Thursday. The Unified Command is coordinating with the National Oceanic and [...]
2. THREAT: OIL. COMMODITY: LOUISIANA SWEET CRUDE. MAXIMUM POTENTIAL RELEASE: 1100000 GALLONS. TAGS: PIPELINE.
3. POSITION 29.297N 088.718W. NOAA INCIDENTNEWS 10692: https://incidentnews.noaa.gov/incident/10692
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