4 CCR 723-3-3609 - Planning Reserve Margins and Contingency Plans

(a) The utility shall provide a description of, and justification for, the means by which it assesses the desired level of reliability on its system throughout the planning period (e.g., probabilistic or deterministic reliability indices).

(b) The utility shall develop and justify planning reserve margins for the resource acquisition period for the base case, high, and low forecast scenarios established under rule 3606, to include risks associated with: the development of generation; losses of generation capacity purchase of power; losses of transmission capability; risks due to known or reasonably expected changes in environmental regulatory requirements; and, other risks. The utility shall develop planning reserve margins for its system over the planning period beyond the resource acquisition period for the base case forecast scenario. The utility shall also quantify the recommended or required reliability performance criteria for reserve groups and power pools to which the utility is a party.

(c) Since actual circumstances may differ from the most likely estimate of future resource needs, the utility shall develop contingency plans for the resource acquisition period. As a part of its plan, the utility shall provide, under seal, a description of its proposed contingency plans for the acquisition of additional resources if actual circumstances deviate from the most likely estimate of future resource needs developed pursuant to rule 3610; or, replacement resources in the event that resources are not developed in accordance with a Commission-approved plan under rule 3617. The utility will identify the estimated costs it will incur in developing the contingency plan for addressing the acquisition of these resources (e.g., purchasing equipment options, establishing sites, engineering). The Commission will consider approval of contingency plans only after the utility receives bids, as described in subparagraph 3618(b)(II). The provisions of paragraph 3617(d) shall not apply to the contingency plans unless explicitly ordered by the Commission.

Notes

4 CCR 723-3-3609

38 CR 17, September 10, 2015, effective 9/30/2015 39 CR 06, March 25, 2016, effective 4/14/2016 39 CR 08, April 25, 2016, effective 5/15/2016 40 CR 22, November 25, 2017, effective 12/15/2017 42 CR 03, February 10, 2019, effective 3/2/2019 42 CR 07, April 10, 2019, effective 4/30/2019 42 CR 09, May 10, 2019, effective 5/30/2019 43 CR 08, April 25, 2020, effective 5/15/2020 43 CR 12, June 25, 2020, effective 7/15/2020 43 CR 20, October 25, 2020, effective 11/14/2020 44 CR 13, July 10, 2021, effective 7/30/2021 44 CR 24, December 25, 2021, effective 1/14/2022 45 CR 18, September 25, 2022, effective 10/15/2022 46 CR 02, January 25, 2023, effective 2/14/2023