06/07/2018 REFERENCE INDEX PRICES FOR IMBALANCE CASHOUTS The reference prices used to determine the Cash Out Index Price, pursuant to Sections 1.6 and 10.4 of the General Terms and Conditions of Cheyenne Plains' First Revised Volume No. 1 Tariff, for the month of May 2018 are as follows: Cheyenne Hub NGI Bidweek Survey Price $1.9100 Cheyenne Hub NGI Daily Average Price $1.8477 Average – NGI Bidweek Survey $2.0425 (ANR SW; NGPL Midcontinent; Panhandle Eastern; Southern Star) Average – NGI Daily Gas Price Index $2.0877 (ANR SW; NGPL Midcontinent; Panhandle Eastern; Southern Star) If you have any questions or need additional information, please call your Marketing Account Representative.