SB365

Revise siltation structure capacity at mines

Complete·4/17/25

Montana SB365 revises siltation structure capacity requirements at mines.

Montana SB365 revises the capacity requirements for siltation structures at strip mines and underground mines. The bill mandates that siltation structures must be designed to detain water inflow or runoff from an anticipated precipitation event plus the average inflow from the underground mine. The structures must be constructed with a specified design capacity to ensure compliance. The bill also outlines various operational and reclamation requirements for mining activities, including measures to prevent land subsidence, avoid channel deepening, and preserve hydrologic functions.

Included in complete analysis

  • Overview
  • Core Provisions
  • Implementation
  • Impact
  • Legal Framework
  • Critical Issues

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Sponsors

0
1
R
Democratic CaucusRepublican Caucus

Roll Call Votes

99 Yea

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0 Nay

1 Absent

R

Calendar

Mar 21, 2025

3:00 PM

House Natural Resources Hearing

Feb 24, 2025

3:00 PM

Senate Natural Resources Hearing

History

Apr 18, 2025

Senate

Chapter Number Assigned

Apr 17, 2025

Senate

(S) Signed by Governor

Apr 8, 2025

House

(H) Signed by Speaker