BLACK HILLS ENERGY — Integrity Assurance Notification

MAOP RECONFIRMATION METHOD 6Black Hills Energy is proposing a Method 6, Alternative Technology, approach to MAOP Reconfirmation per 49 CFR §192.624(c)(6) for its project segment named AR-087, located in Boone County, Arkansas, which begins at 36.235160, -93.185891 and ends at 36.235138, 93.176791. AR-087 is comprised of 2,790.8 feet of 6.625” OD x 0.250” wall thickness, X42/X52 grade pipe that was installed in 2016. The pipe description in the records is identified as “PIPE 6-5/8” .250W GR X52 ERW FBE PE CS”, which is also confirmed with an internal stock number that matches the same description. The pipe segments adjacent to this segment have been verified to be 6.625” OD x 0.188” wall thickness X42/X52 grade pipe, installed in 2012 and 2013, and have supporting pressure test records.#