# COLUMBIA GAS TRANSMISSION, LLC — Integrity Assurance Notification

- **operation:** document
- **citation:** PHMSA 23-295264
- **title:** COLUMBIA GAS TRANSMISSION, LLC — Integrity Assurance Notification
- **source type:** inspection
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2023-12-21
- **effective on:** 2023-12-21
- **summary:** GAS TRANSMISSION in AR,AZ,CA,DE,IA,ID,IL,IN,KS,KY,LA,MD,MI,MN,MO,MS,MT,ND,NE,NH,NJ,NV,NY,OH,OK,OR,PA,SD,TN,TX,VA,VT,WA,WI,WV,WY; ECA MECHANICAL DAMAGE EVALUATION; PHMSA status: RESOLVED.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-leading-ian-23-295264-operator-2616.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-leading-ian-23-295264-operator-2616.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-leading-ian-23-295264-operator-2616
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/data_statistics/pipeline/SRCR_and_Integrity_Assurance_Notifications.zip
**body:**

The purpose of this letter is to provide advance submission in accordance with §192.18 of TC Energy’s Dent Engineering Critical Assessment procedure developed in accordance with 49 CFR, §192.712(c)(11). This procedure utilizes the same ECA methodology as the TC Energy Special Permit Dent ECA procedure that was granted a letter of no objection by PHMSA on 6/15/2023. The draft procedure, TEP-IN-ECA-G Dent Engineering Critical Assessment Outside SP (US) will publish on February 1, 2024, and apply to the following TC Energy Pipeline Operating Systems. (See attached)
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- **body characters:** 568