---
type: "Bill"
title: "Utility Regulation"
description: "Section 1 of the act requires the public utilities commission (commission), if relying on a discount rate when calculating the net present value of future carbon-based fuel costs as part of a utility's electric resource plan, to apply a discount rate that does not exceed the long-term rate of inflation. The commission is required to determine an appropriate rate of inflation specifically for fuel costs."
jurisdiction: "us/states/co"
legislature: "Colorado General Assembly"
session: "2023A"
identifier: "SB 23-291"
citation: "Colorado SB 23-291 (2023A)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Chris deGruy Kennedy", "Lisa Cutter", "Matthew Martinez", "Steve Fenberg"]
version_count: 11
action_count: 15
vote_count: 4
first_action: "2023-04-18T06:00:00+00:00"
last_action: "2023-05-11T06:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/1bf5d7f3-9023-4e0d-9ea6-863f425fc2f0"
source_url: "https://leg.colorado.gov/bills/sb23-291"
source_hash: "b99e47e575f36576f23b6334487816896150dfc4897159588a5118ef1befb603"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-co"]
---

# Colorado SB 23-291 (2023A) — Utility Regulation

Section 1 of the act requires the public utilities commission (commission), if relying on a discount rate when calculating the net present value of future carbon-based fuel costs as part of a utility's electric resource plan, to apply a discount rate that does not exceed the long-term rate of inflation. The commission is required to determine an appropriate rate of inflation specifically for fuel costs.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Committee Amendment** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2023a_sb291_h_app_003.pdf)
2. **Engrossed (04/25/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_eng.pdf)
3. **Final Act (05/10/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_enr.pdf)
4. **Introduced (04/18/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_01.pdf)
5. **PA1 (04/21/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_s_app_01.pdf)
6. **PA2 (05/03/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_h_fin_01.pdf)
7. **PA3 (05/03/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_h_fin_app_01.pdf)
8. **Reengrossed (04/26/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_ren.pdf)
9. **Rerevised (05/06/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_rer.pdf)
10. **Revised (05/05/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_291_rev.pdf)
11. **Signed Act (05/11/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2023a_291_signed.pdf)

## Votes

- BILL — **46–19** (pass) · lower
- CONCUR — **24–11** (pass) · upper
- REPASS — **23–12** (pass) · upper
- BILL — **21–13** (pass) · upper

## Sponsors

- Chris deGruy Kennedy — primary (person)
- Lisa Cutter — primary (person)
- Matthew Martinez — primary (person)
- Steve Fenberg — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2023-05-11T06:00:00+00:00** Governor Signed `executive-signature`
- **2023-05-10T06:00:00+00:00** Sent to the Governor `executive-receipt`
- **2023-05-10T06:00:00+00:00** Signed by the President of the Senate
- **2023-05-09T06:00:00+00:00** Signed by the Speaker of the House
- **2023-05-08T06:00:00+00:00** Senate Considered House Amendments - Result was to Concur - Repass
- **2023-05-06T06:00:00+00:00** House Third Reading Passed - No Amendments `passage, reading-3`
- **2023-05-05T06:00:00+00:00** House Second Reading Special Order - Passed with Amendments - Committee, Floor
- **2023-05-03T06:00:00+00:00** House Committee on Appropriations Refer Amended to House Committee of the Whole `committee-passage, referral-committee`
- **2023-05-01T06:00:00+00:00** House Committee on Finance Refer Amended to Appropriations `referral-committee`
- **2023-04-28T06:00:00+00:00** Introduced In House - Assigned to Finance `introduction`
- **2023-04-26T06:00:00+00:00** Senate Third Reading Passed - No Amendments `passage, reading-3`
- **2023-04-25T06:00:00+00:00** Senate Second Reading Passed with Amendments - Committee, Floor `reading-2`
- **2023-04-21T06:00:00+00:00** Senate Committee on Appropriations Refer Amended to Senate Committee of the Whole `committee-passage, referral-committee`
- **2023-04-20T06:00:00+00:00** Senate Committee on Finance Refer Unamended to Appropriations `referral-committee`
- **2023-04-18T06:00:00+00:00** Introduced In Senate - Assigned to Finance `introduction`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/1bf5d7f3-9023-4e0d-9ea6-863f425fc2f0`. Confidence: reported (aggregated from official Colorado legislature records).