---
type: "Bill"
title: "Generally revise opencut laws"
description: "Generally revise opencut laws"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2021"
identifier: "HB 599"
citation: "Montana HB 599 (2021)"
classification: ["bill"]
subjects: ["Environmental Protection", "Mining and Minerals (see also: Oil and Gas)"]
status: "enacted"
primary_sponsors: ["Steve Gunderson"]
version_count: 5
action_count: 57
vote_count: 8
first_action: "2020-12-10"
last_action: "2021-05-14"
source: "openstates"
source_identifier: "ocd-bill/2796db2a-3684-423a-b9ad-fe2b7ac8c015"
source_url: "http://laws.leg.mt.gov/legprd/LAW0210W$BSIV.ActionQuery?P_BILL_NO1=599&P_BLTP_BILL_TYP_CD=HB&Z_ACTION=Find&P_SESS=20211"
source_hash: "c92e67ab7aa69403df3d9c3a8b429bf7e92e29ee8427f3bd25bfa6a50c68bb59"
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 HB 599 (2021) — Generally revise opencut laws

## Version chain

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

1. **HB0599_1.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0599//HB0599_1.pdf)
2. **HB0599_2.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0599//HB0599_2.pdf)
3. **HB0599_3.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0599//HB0599_3.pdf)
4. **HB0599_X.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0599//HB0599_X.pdf)
5. **Enrolled** (enrolled) — [source](https://leg.mt.gov/bills/2021/billpdf/HB0599.pdf)

## Votes

- DO PASS AS AMENDED — **10–5** (pass) · lower
- Do Concur — **31–19** (pass) · upper
- Do Pass — **68–32** (pass) · lower
- Do Concur — **67–32** (pass) · lower
- Do Pass — **67–32** (pass) · lower
- BE CONCURRED IN AS AMENDED — **8–4** (pass) · upper
- Do Concur — **63–35** (pass) · lower
- Do Concur — **29–21** (pass) · upper

## Sponsors

- Steve Gunderson — primary (person)

## Timeline

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

- **2020-12-10** Draft Request Received
- **2021-01-22** Draft On Hold
- **2021-02-11** Draft to Requester for Review
- **2021-02-13** Draft to Requester for Review
- **2021-02-16** Draft in Legal Review
- **2021-02-16** Draft in Edit
- **2021-02-20** Draft to Drafter - Edit Review
- **2021-02-22** Draft in Input/Proofing
- **2021-02-23** Draft in Final Drafter Review
- **2021-02-23** Bill Draft Text Available Electronically
- **2021-02-23** Executive Director Review
- **2021-02-23** Draft in Assembly
- **2021-02-23** Draft Ready for Delivery
- **2021-02-23** Executive Director Final Review
- **2021-02-23** Draft Ready for Delivery
- **2021-02-23** Draft Delivered to Requester
- **2021-02-23** Introduced `introduction`
- **2021-02-23** Fiscal Note Requested
- **2021-02-23** Referred to Committee - (H) Natural Resources `referral-committee`
- **2021-02-23** First Reading `reading-1`
- **2021-02-24** Introduced Bill Text Available Electronically
- **2021-02-26** Amendments Available
- **2021-02-26** Hearing - (H) Natural Resources
- **2021-02-26** Committee Executive Action--Bill Passed as Amended - (H) Natural Resources `committee-passage`
- **2021-03-01** Fiscal Note Received
- **2021-03-01** Fiscal Note Unsigned
- **2021-03-01** Fiscal Note Printed
- **2021-03-01** Printed - New Version Available
- **2021-03-01** Committee Report--Bill Passed as Amended - (H) Natural Resources `committee-passage`
- **2021-03-02** Scheduled for 2nd Reading
- **2021-03-02** 2nd Reading Passed `reading-2`
- **2021-03-02** Scheduled for 3rd Reading
- **2021-03-02** 3rd Reading Passed `passage, reading-3`
- **2021-03-02** Transmitted to Senate
- **2021-03-08** First Reading `reading-1`
- **2021-03-08** Referred to Committee - (S) Natural Resources `referral-committee`
- **2021-03-15** Hearing - (S) Natural Resources
- **2021-03-26** Committee Executive Action--Bill Concurred as Amended - (S) Natural Resources
- **2021-03-30** Committee Report--Bill Concurred as Amended - (S) Natural Resources
- **2021-03-30** Printed - New Version Available
- **2021-04-13** Scheduled for 2nd Reading
- **2021-04-13** 2nd Reading Concurred `reading-2`
- **2021-04-14** Scheduled for 3rd Reading
- **2021-04-14** 3rd Reading Concurred `passage, reading-3`
- **2021-04-14** Returned to House with Amendments
- **2021-04-23** Scheduled for 2nd Reading
- **2021-04-23** 2nd Reading Senate Amendments Concurred `amendment-amendment, amendment-passage, reading-2`
- **2021-04-26** Scheduled for 3rd Reading
- **2021-04-26** 3rd Reading Passed as Amended by Senate `passage, reading-3`
- **2021-04-26** Sent to Enrolling
- **2021-04-27** Returned from Enrolling
- **2021-04-27** Printed - Enrolled Version Available
- **2021-05-04** Signed by Speaker
- **2021-05-04** Signed by President
- **2021-05-04** Transmitted to Governor `executive-receipt`
- **2021-05-14** Signed by Governor `executive-signature`
- **2021-05-14** 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/2796db2a-3684-423a-b9ad-fe2b7ac8c015`. Confidence: reported (aggregated from official Montana legislature records).