# NORTHERN NATURAL GAS CO — Integrity Assurance Notification

- **operation:** document
- **citation:** PHMSA 24-322375
- **title:** NORTHERN NATURAL GAS CO — Integrity Assurance Notification
- **source type:** inspection
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2024-09-12
- **effective on:** 2024-09-12
- **summary:** GAS TRANSMISSION in MN,WI; MAOP RECONFIRMATION METHOD 6; PHMSA status: RESOLVED.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-322375-operator-13750.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-322375-operator-13750.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-leading-ian-24-322375-operator-13750
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/data_statistics/pipeline/SRCR_and_Integrity_Assurance_Notifications.zip
**body:**

Northern has a small number of pipelines with an established MAOP higher than the source pressure MAOP, which historically operate below 30% SMYS. Northern intends to lower the MAOP on these branch lines to align with the source pipeline's MAOP. After this documentation alignment, the lower MAOP will be less than 30% SMYS based on paragraph 192.624(a)(2).
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