01/08/2019 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 December 2018 are as follows: Cheyenne Hub NGI Bidweek Survey Price $4.2250 Cheyenne Hub NGI Daily Average Price $3.5389 Average – NGI Bidweek Survey $4.3788 (ANR SW; NGPL Midcontinent; Panhandle Eastern; Southern Star) Average – NGI Daily Gas Price Index $3.4528 (ANR SW; NGPL Midcontinent; Panhandle Eastern; Southern Star) If you have any questions or need additional information, please call your Marketing Account Representative.