---
type: "Bill"
title: "Revise siltation structure capacity at mines"
description: "Revise siltation structure capacity at mines"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "SB 365"
citation: "Montana SB 365 (2025)"
classification: ["bill"]
subjects: ["Mining and Minerals", "Rule Making", "Water"]
status: "enacted"
primary_sponsors: ["Barry Usher"]
version_count: 35
action_count: 37
vote_count: 6
first_action: "2024-11-16T21:08:17+00:00"
last_action: "2025-04-18T19:48:31+00:00"
source: "openstates"
source_identifier: "ocd-bill/f2e9deb2-7c2b-497a-8c18-1bde49e62814"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC1508?open_tab=sum"
source_hash: "72e89918456e272f9f55ad997b33dd6eef6a2935b408d7cf83b77163c494b6f3"
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 365 (2025) — Revise siltation structure capacity at mines

## Version chain

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

1. **LC1508.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=281274)
2. **SB0365.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=288285)
3. **SB0365_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290527)
4. **SB0365_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290528)
5. **SB0365_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290529)
6. **SB0365_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290530)
7. **SB0365_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284164)
8. **SB0365_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290532)
9. **SB0365_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290533)
10. **SB0365_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290534)
11. **SB0365_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290654)
12. **SB0365_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290661)
13. **SB0365_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290731)
14. **SB0365_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293379)
15. **SB0365_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296936)
16. **SB0365_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302198)
17. **SB0365_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=290531)
18. **SB0365_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302061)
19. **SB0365_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316609)
20. **SB0365_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320204)
21. **SB0365_X(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321270)
22. **SB0365_X(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321271)
23. **SB0365_X(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321272)
24. **SB0365_X(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324560)
25. **SB0365_X(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=326229)
26. **SB0365_X(17).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327539)
27. **SB0365_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302062)
28. **SB0365_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302197)
29. **SB0365_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302601)
30. **SB0365_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302604)
31. **SB0365_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302605)
32. **SB0365_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302628)
33. **SB0365_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302629)
34. **SB0365_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310656)
35. **SB0365_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302060)

## Votes

- Do Concur — **99–0** (pass) · lower
- Do Pass — **47–3** (pass) · upper
- do_pass_as_amended — **11–0** (pass) · upper
- be_concurred_in — **14–0** (pass) · lower
- Do Concur — **100–0** (pass) · lower
- Do Pass — **48–2** (pass) · upper

## Sponsors

- Barry Usher — primary (person)

## Timeline

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

- **2024-11-16T21:08:17+00:00** (LC) Drafter Assigned
- **2025-01-10T21:23:53+00:00** (LC) Draft On Hold
- **2025-01-24T18:34:45+00:00** (LC) Draft Taken Off Hold
- **2025-02-06T22:24:47+00:00** (LC) Draft in Legal Review
- **2025-02-07T17:35:16+00:00** (LC) Draft in Edit
- **2025-02-12T15:35:09+00:00** (LC) Draft in Input/Proofing
- **2025-02-14T15:52:09+00:00** (LC) Draft in Final Drafter Review
- **2025-02-14T21:02:40+00:00** (LC) Draft in Assembly
- **2025-02-15T18:16:39+00:00** (LC) Draft Ready for Delivery
- **2025-02-17T22:45:28+00:00** (LC) Draft Delivered to Requester
- **2025-02-19T17:21:00+00:00** (S) Introduced
- **2025-02-19T20:09:05+00:00** (S) First Reading `reading-1`
- **2025-02-21T15:57:37+00:00** (S) Referred to Committee - (S) Natural Resources `referral-committee`
- **2025-02-21T18:17:32+00:00** (S) Hearing - (S) Natural Resources
- **2025-03-01T02:13:02+00:00** (S) Committee Executive Action--Bill Passed as Amended - (S) Natural Resources `committee-passage`
- **2025-03-01T18:45:00+00:00** (S) Committee Report--Bill Passed as Amended - (S) Natural Resources `committee-passage`
- **2025-03-05T15:30:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-03-05T17:58:00+00:00** (S) 2nd Reading Passed `reading-2, reading-2`
- **2025-03-06T15:30:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-03-06T19:15:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2025-03-06T20:25:30+00:00** (S) Transmitted to House
- **2025-03-07T17:17:15+00:00** (H) Referred to Committee - (H) Natural Resources `referral-committee`
- **2025-03-17T19:15:00+00:00** (H) First Reading `reading-1`
- **2025-03-19T23:31:36+00:00** (H) Hearing - (H) Natural Resources
- **2025-03-21T23:31:04+00:00** (H) Committee Executive Action--Bill Concurred - (H) Natural Resources
- **2025-03-24T20:12:00+00:00** (H) Committee Report--Bill Concurred - (H) Natural Resources
- **2025-03-29T15:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-03-29T16:08:00+00:00** (H) 2nd Reading Concurred `reading-2, reading-2`
- **2025-03-31T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-03-31T19:50:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2025-03-31T19:51:13+00:00** (S) Sent to Enrolling
- **2025-04-02T13:00:54+00:00** (S) Returned from Enrolling
- **2025-04-07T16:00:02+00:00** (S) Signed by President `passage`
- **2025-04-08T16:15:25+00:00** (H) Signed by Speaker `passage`
- **2025-04-08T22:56:08+00:00** (S) Transmitted to Governor `executive-receipt`
- **2025-04-17T18:00:00+00:00** (S) Signed by Governor `executive-signature`
- **2025-04-18T19:48:31+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/f2e9deb2-7c2b-497a-8c18-1bde49e62814`. Confidence: reported (aggregated from official Montana legislature records).