# NUSTAR PIPELINE OPERATING PARTNERSHIP L.P. — Integrity Assurance Notification

- **operation:** document
- **citation:** PHMSA 25-332486
- **title:** NUSTAR PIPELINE OPERATING PARTNERSHIP L.P. — Integrity Assurance Notification
- **source type:** inspection
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** 2025-01-27
- **effective on:** 2025-01-27
- **summary:** HAZARDOUS LIQUID in AR; PRESSURE; PHMSA status: UNDER REVIEW.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-332486-operator-10012.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-332486-operator-10012.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-332486-operator-10012
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/data_statistics/pipeline/SRCR_and_Integrity_Assurance_Notifications.zip
**body:**

This is a notification of a Long-Term Pressure Reduction under 49 CFR § 195.452 (h)(1)(ii). On January 26, 2024, NuStar Pipeline Operating Partnership L.P. implemented a pressure reduction of 1300 psi on the Hampton to Cabot 10” pipeline segment in the state of Arkansas in response to eight anomalies that were not remediated by their due date. There is currently one anomaly that has not been remediated. Reasons for Delay: Current attempts to investigate and remediate the anomaly have been delayed due to weather. Significant rainfall and flooding in the target areas has caused ditch inaccessibility and created unsafe work conditions. Further Remedial Actions: Of the eight original anomalies that led to the pressure reduction, seven of those have been remediated and only one anomaly remains. In addition, on January 24, 2025, Sunoco took further action by recalculating the safe pressure of the outstanding anomaly based on predicted growth up to the current date. The currently implemented pressure reduction of 1300 psi is below the recalculated safe pressure of 1586 psi, therefore no additional reduction is needed.
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