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

- **operation:** document
- **citation:** PHMSA 24-299855
- **title:** NUSTAR PIPELINE OPERATING PARTNERSHIP L.P. — Integrity Assurance Notification
- **source type:** inspection
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2024-02-02
- **effective on:** 2024-02-02
- **summary:** HAZARDOUS LIQUID in IL,IN,MO; PRESSURE; PHMSA status: RESOLVED.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-299855-operator-10012.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-299855-operator-10012.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-299855-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 February 2, 2023, NuStar Pipeline Operating Partnership L.P. implemented a pressure reduction of 1170 psi on the Trilla to Terra Haute 8” pipeline segment in response to two anomalies that were not remediated by their due date. Reasons for Delay: Current attempts to investigate and remediate both anomalies 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: On February 2, 2024, NuStar took further remedial action by implementing an additional 20% pressure reduction (to 935 psi).
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- **body characters:** 709