Common use of Hourly Firm Clause in Contracts

Hourly Firm. Bonneville will only offer hourly firm transmission service based on available transfer capability (“ATC”) that is calculated in accordance with Bonneville’s short-term ATC methodology. Bonneville will begin limiting the hourly firm product beginning July 1, 2019. a. Hourly firm reservations will not be available in real-time starting January 1, 2020. Hourly firm may only be reserved until the day prior to the operating day at 2340. b. Bonneville will perform the analysis described in section 2.d below starting from a neutral position (i.e., no certainty as to end state for the hourly firm product). c. In the TC-22 period (October 1, 2021 –September 30, 2023), Bonneville will provide hourly firm service that may be reserved until the day prior to the operating day at 2340. Bonneville may propose a change from this status quo during the TC-22 proceeding after: i. Bonneville identifies hourly firm service as (1) A demonstrable adverse reliability risk, (2) A more than de minimis adverse impact to firm transmission service, or