Design day definition
Design day means reasonably anticipated colder-than-normal weather conditions during a 24-hour period beginning at 9 a.m.
Design day means the maximum heating season forecast level of all firm sales customers’ gas requirements during a 24-hour period beginning at 9 a.m. The design day forecast shall be the combined estimated gas requirements of all firm sales customers calculated by totaling the gas requirements of each customer classification or grouping. The estimated gas requirements for each customer classification or grouping will be determined based upon an evaluation of historic usage levels of customers in each customer classification or grouping, adjusted for reasonably anticipated colder-than-normal weather conditions and any other clearly identifiable factors that may contribute to the demand for gas by firm customers. The design day calculation shall be submitted for approval by the board with the annual PGA filing required by subrule 19.9(2).
Design day means “[a] 24-hour period of demand which is used as a basis for planning gas capacity requirements.” American Gas Association Glossary, http://www.aga.org; and Ohio Adm.Code 4901:5-7-01(A).