NORTHERN NATURAL GAS CO — Integrity Assurance Notification

MAOP RECONFIRMATION METHOD 6Northern 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).#