---
type: "Bill"
title: "Revise laws related to considerations for measuring of streamflow"
description: "Revise laws related to considerations for measuring of streamflow"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "SB 61"
citation: "Montana SB 61 (2025)"
classification: ["bill"]
subjects: ["Water"]
status: "enacted"
primary_sponsors: ["Bruce \"Butch\" Gillespie"]
version_count: 35
action_count: 35
vote_count: 6
first_action: "2024-10-08T20:02:00+00:00"
last_action: "2025-02-27T19:15:20+00:00"
source: "openstates"
source_identifier: "ocd-bill/4b634e19-45ec-4628-8482-03c86fa50687"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC0552?open_tab=sum"
source_hash: "4e0fb1135e32350954897fa3b2d55c461f4346967d0f68fd09eb6c27ceea2dbc"
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-mt"]
---

# Montana SB 61 (2025) — Revise laws related to considerations for measuring of streamflow

## Version chain

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

1. **LC0552.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=266623)
2. **SB0061_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=269182)
3. **SB0061_1(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=276439)
4. **SB0061_1(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277971)
5. **SB0061_1(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284225)
6. **SB0061_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272813)
7. **SB0061_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272814)
8. **SB0061_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272815)
9. **SB0061_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272816)
10. **SB0061_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272819)
11. **SB0061_1(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272821)
12. **SB0061_1(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272975)
13. **SB0061_1(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=275390)
14. **SB0061_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=269181)
15. **SB0061_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284226)
16. **SB0061_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284227)
17. **SB0061_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284228)
18. **SB0061_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284715)
19. **SB0061_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284716)
20. **SB0061_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284784)
21. **SB0061_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284785)
22. **SB0061_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289850)
23. **SB0061_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289851)
24. **SB0061_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284224)
25. **SB0061_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=295337)
26. **SB0061_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=325861)
27. **SB0061_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=297358)
28. **SB0061_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=297359)
29. **SB0061_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=297360)
30. **SB0061_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310569)
31. **SB0061_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316531)
32. **SB0061_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320139)
33. **SB0061_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321310)
34. **SB0061_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324574)
35. **SB0061_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=294170)

## Votes

- do_pass — **11–0** (pass) · upper
- Do Concur — **88–11** (pass) · lower
- Do Pass — **34–16** (pass) · upper
- be_concurred_in — **14–0** (pass) · lower
- Do Concur — **92–7** (pass) · lower
- Do Pass — **28–21** (pass) · upper

## Sponsors

- Bruce "Butch" Gillespie — primary (person)

## Timeline

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

- **2024-10-08T20:02:00+00:00** (LC) Drafter Assigned
- **2024-11-25T22:29:45+00:00** (LC) Draft in Legal Review
- **2024-11-26T15:57:16+00:00** (LC) Draft in Edit
- **2024-12-02T16:40:45+00:00** (LC) Draft in Input/Proofing
- **2024-12-03T16:12:58+00:00** (LC) Draft in Final Drafter Review
- **2024-12-04T18:57:25+00:00** (LC) Draft in Assembly
- **2024-12-05T17:08:15+00:00** (LC) Draft Ready for Delivery
- **2024-12-16T19:48:11+00:00** (LC) Draft Delivered to Requester
- **2024-12-16T20:11:00+00:00** (S) Introduced
- **2025-01-06T21:48:00+00:00** (S) First Reading `reading-1`
- **2025-01-07T21:52:00+00:00** (S) Referred to Committee - (S) Natural Resources `referral-committee`
- **2025-01-10T17:48:04+00:00** (S) Hearing - (S) Natural Resources
- **2025-01-15T23:06:40+00:00** (S) Committee Executive Action--Bill Passed - (S) Natural Resources `committee-passage`
- **2025-01-16T20:11:00+00:00** (S) Committee Report--Bill Passed - (S) Natural Resources `committee-passage`
- **2025-01-17T20:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-01-17T20:41:00+00:00** (S) 2nd Reading Passed `reading-2, reading-2`
- **2025-01-20T20:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-01-20T20:55:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2025-01-21T15:03:18+00:00** (S) Transmitted to House
- **2025-01-21T17:21:14+00:00** (H) Referred to Committee - (H) Natural Resources `referral-committee`
- **2025-01-21T20:10:01+00:00** (H) First Reading `reading-1`
- **2025-01-24T17:42:09+00:00** (H) Hearing - (H) Natural Resources
- **2025-02-01T00:45:00+00:00** (H) Committee Executive Action--Bill Concurred - (H) Natural Resources
- **2025-02-03T20:17:00+00:00** (H) Committee Report--Bill Concurred - (H) Natural Resources
- **2025-02-14T20:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-02-14T20:43:00+00:00** (H) 2nd Reading Concurred `reading-2, reading-2`
- **2025-02-18T20:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-02-18T21:24:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2025-02-18T21:25:19+00:00** (S) Sent to Enrolling
- **2025-02-20T18:06:05+00:00** (S) Returned from Enrolling
- **2025-02-21T00:00:00+00:00** (S) Signed by President `passage`
- **2025-02-21T00:40:48+00:00** (H) Signed by Speaker `passage`
- **2025-02-21T23:00:00+00:00** (S) Transmitted to Governor `executive-receipt`
- **2025-02-27T16:00:00+00:00** (S) Signed by Governor `executive-signature`
- **2025-02-27T19:15:20+00:00** Chapter Number Assigned `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/4b634e19-45ec-4628-8482-03c86fa50687`. Confidence: reported (aggregated from official Montana legislature records).