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

- **operation:** document
- **citation:** PHMSA 24-325872
- **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:** 2024-11-13
- **effective on:** 2024-11-13
- **summary:** HAZARDOUS LIQUID in NE; PRESSURE; PHMSA status: UNDER REVIEW.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-325872-operator-10012.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-325872-operator-10012.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-325872-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 November 13, 2023, NuStar implemented a pressure reduction of 730 psi on the David City to Aurora 6” pipeline segment in response to anomalies that were not remediated by their due date. Reasons for Delay: Remediation has been delayed due to anomaly location being under a road. An HDD is currently being planned to remediate the anomalies. Further Remedial Actions: On November 13, 2024, further remedial action was taken by implementing an additional 10% pressure reduction (to 657 psi) at the location of the anomalies. In addition, Sunoco performed calculations to ensure that the safe pressure of the anomalies remained above the maximum operating pressure. This calculation took into account an estimated growth rate applied to the anomalies.
- **truncated:** false
- **body characters:** 843