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Longhorn Info
The Longhorn Mitigation Plan (LMP) contains commitments to implement pipeline and operating measures that protect the environment and human health and safety. Click on the following links for more information about the LMP:
- Longhorn Mitigation Plan (March 2023) (PDF, 601 KB)
- Tables, Charts, and Appendices (PDF, 5,539 KB)
- Longhorn Pipeline System Integrity Plan (LPSIP) * (PDF, 6,384 KB)
- First Supplement to the Mitigation Plan (PDF, 118 KB)
- Second Supplement to the Mitigation Plan (PDF, 461 KB)
- Longhorn Asset Map * (PDF, 608 KB)
Longhorn Mitigation Plan Reports
Click on the headers below to expand each section.Operational Reliability Assessment Reports
- Operational Reliability Assessment Report 2022 * (PDF, 5 MB)
- Operational Reliability Assessment Report 2021 * (PDF, 5 MB)
- Operational Reliability Assessment Report 2020 * (PDF, 5 MB)
- Operational Reliability Assessment Report 2019 * (PDF, 7 MB)
- Operational Reliability Assessment Report 2018 * (PDF, 3 MB)
- Operational Reliability Assessment Report 2017 * (PDF, 2 MB)
- Operational Reliability Assessment Report 2016 * (PDF, 2 MB)
- Operational Reliability Assessment Report 2015 * (PDF, 1,539 KB)
- Operational Reliability Assessment Report 2014 * (PDF, 1,735 KB)
- Operational Reliability Assessment Report 2013 * (PDF, 1,470 KB)
- Operational Reliability Assessment Report 2012 * (PDF, 763 KB)
- Operational Reliability Assessment Report 2011 * (PDF, 630 KB)
- Operational Reliability Assessment Report 2010 * (PDF, 826 KB)
- Operational Reliability Assessment Report 2009 * (PDF, 1,677 KB)
LPSIP - Self-Audit Report
- 2022 LPSIP Self-Audit Report * (PDF, 689 KB)
- 2021 LPSIP Self-Audit Report * (PDF, 534 KB)
- 2020 LPSIP Self-Audit Report * (PDF, 987 KB)
- 2019 LPSIP Self-Audit Report * (PDF, 1 MB)
- 2018 LPSIP Self-Audit Report * (PDF, 1 MB)
- 2017 LPSIP Self-Audit Report * (PDF, 1 MB)
- 2016 LPSIP Self-Audit Report * (PDF, 620 KB)
- 2015 LPSIP Self-Audit Report * (PDF, 706 KB)
- 2014 LPSIP Self-Audit Report * (PDF, 253 KB)
- 2013 LPSIP Self-Audit Report * (PDF, 2,048KB)
- 2012 LPSIP Self-Audit Report * (PDF, 766 KB)
- 2011 LPSIP Self-Audit Report * (PDF, 2,475 KB)
- 2010 LPSIP Self-Audit Report * (PDF, 844 KB)
- 2009 LPSIP Self-Audit Report * (PDF, 465 KB)
Annual Commitment Implementation Status Report
- 2023 Annual Commitment Implementation Status Report * (PDF, 101 KB)
- 2022 Annual Commitment Implementation Status Report * (PDF, 101 KB)
- 2021 Annual Commitment Implementation Status Report * (PDF, 104 KB)
- 2020 Annual Commitment Implementation Status Report * (PDF, 115 KB)
- 2019 Annual Commitment Implementation Status Report * (PDF, 122 KB)
- 2018 Annual Commitment Implementation Status Report * (PDF, 113 KB)
- 2017 Annual Commitment Implementation Status Report * (PDF, 193 KB)
- 2016 Annual Commitment Implementation Status Report * (PDF, 47 KB)
- 2015 Annual Commitment Implementation Status Report * (PDF, 176 KB)
- 2014 Annual Commitment Implementation Status Report * (PDF, 332 KB)
- 2013 Annual Commitment Implementation Status Report * (PDF, 530 KB)
- 2012 Annual Commitment Implementation Status Report * (PDF, 337 KB)
- 2011 Annual Commitment Implementation Status Report * (PDF, 29 KB)
- 2010 Annual Commitment Implementation Status Report * (PDF, 30 KB)
If you would like a copy of a report related to the Longhorn Mitigation Plan (LMP), please contact Damage Prevention. For information about the Environmental Assessment, please contact the Environmental Protection Agency (EPA) at www.epa.gov.
Longhorn Documents
Click on the headers below to expand each section.PHMSA Letters
- PHMSA Letter -- LMP Changes (March 2023) * (PDF, 264 KB)
- PHMSA Letter -- LMP Changes (December 2022) * (PDF, 168 KB)
- PHMSA Letter -- LMC Response (August 2022) * (PDF, 175 KB)
- PHMSA Letter -- LMC Response (August 2022) * (PDF, 175 KB)
- PHMSA Letter – LMP Changes (June 2022) * (PDF, 154 KB)
- PHMSA Letter – LMP Changes (Sept. 2020) * (PDF, 248 KB)
- PHMSA Letter – LMP Changes (June 2020) * (PDF, 115 KB)
- PHMSA Letter – LMP Changes (Mar. 2013) * (PDF, 109 KB)
- PHMSA Letter – LMP Changes (Jan. 2013) * (PDF, 60 KB)
- PHMSA Letter – LMP Changes (Aug. 2013) * (PDF, 86 KB)
- PHMSA Letter – LMP Changes (Nov. 2014) * (PDF, 204 KB)
- PHMSA Letter – LMP Changes (Aug. 2014) * (PDF, 243 KB)
- PHMSA Letter – Flow Rate Increase (Mar. 2014) * (PDF, 48 KB)
- PHMSA Letter – LMP Changes (Jan. 2014) * (PDF, 142 KB)
- PHMSA Letter – LMP Changes (Nov. 2013) * (PDF, 122 KB)
- PHMSA Letter – LMP Changes (July 2013) * (PDF, 1,465 KB)
- PHMSA Letter – LMP Changes (Oct. 2012) * (PDF, 1,465 KB)
- PHMSA Letter – LMP Changes (Feb. 2012) * (PDF, 1,423 KB)
Reversal Self-Audit
- Longhorn Pipeline Reversal Self-Audit Report * (PDF, 411 KB)
- Barnhart Station Matrix * (PDF, 180 KB)
- Bastrop Station Matrix * (PDF, 184 KB)
- Buckhorn Station Matrix * (PDF, 190 KB)
- Cartman Station Matrix * (PDF, 186 KB)
- Eckert Station Matrix * (PDF, 188 KB)
- James River Station Matrix * (PDF, 188 KB)
- Texon Station Matrix * (PDF, 186 KB)
- Warda Station Matrix * (PDF, 188 KB)
Update Letters
- City of Austin Letter * (PDF, 1,849 KB)
- City of El Paso Letter * (PDF, 1,839 KB)
- City of Houston Letter * (PDF, 1,839 KB)
- LCRA Letter * (PDF, 1,921 KB)
- PHMSA Letter * (PDF, 70 KB)
Archived Documents
- September 2000 Mitigation Plan * (PDF, 19,763 KB)