20150818AVU to Staff 84.docx

AVISTA CORPORATION
RESPONSE TO REQUEST FOR INFORMATIONJURISDICTION:IDAHODATE PREPARED:08/12/2015CASE NO.:AVU-E-15-05/AVU-G-15-01WITNESS:Patrick EhrbarREQUESTER:IPUCRESPONDER:Joe MillerTYPE:Production RequestDEPARTMENT:State & Federal RegulationREQUEST NO.:Staff-084TELEPHONE:[phone]REQUEST:
Please describe how many times service has been curtailed, in the last two years, for interruptible customers by schedule. If service has not been curtailed, or is minimal, please describe how the discounted rate for these customers is justified and the methods used to determine their rates.RESPONSE:
The one customer on interruptible Schedule 132 has not been curtailed within the last two years.
The associated baserevenue and expenses for Schedule 131/132 are incorporated in the Company’s cost of service study, which is the Company’s basis and justification for determining the appropriate amount of base revenue for all rate schedules.
In terms of the schedule’s base rates, there is no discount for Schedule 131/132 customers when compared to what they would pay as a large customer on Schedule 111/112. The present base rate for Schedule 131/132 is $0.20459 per therm, which is above the tale block on Schedule 111/112 of $0.17850.
Schedule 131/132 does receive a reduced rate through Schedule 150 (Purchased Gas Cost Adjustment) because the Company does not secure firm interstate pipeline transportation for these customers and therefore the Company and its customers are not otherwise incurring transportation (demand) costs. The rates for Schedule 150 & 155 are approved in the Company’s annual purchased gas cost adjustment filing.