# Relationship history for MSHA mine 2402364

Current hierarchy: **Brad  Mercord → Montana Rockworks Inc → PermaGold**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Ronald R  Stanton → PermaGold; 2001-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stanton Stone Supply, Inc. → PermaGold; 2004-06-16 to 2010-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Ronald R  Stanton → Stanton Stone Supply, Inc.; 2004-06-16 to 2010-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Mercord et al → PermaGold; 2007-09-14 to 2023-01-06; source msha-controller-operator-history
- **operator_operates_mine:** K2 Stone (Montana) LLC → PermaGold; 2011-01-01 to 2014-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Sid  Whittaker et al → PermaGold; 2011-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sid  Whittaker et al → K2 Stone (Montana) LLC; 2011-01-01 to 2014-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Nudd  et al → K2 Stone (Montana) LLC; 2011-01-01 to 2014-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Montana Rockworks Inc → PermaGold; 2014-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Mercord et al → Montana Rockworks Inc; 2014-04-22 to 2023-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Carter et al → Montana Rockworks Inc; 2014-04-22 to 2023-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Mercord → PermaGold; 2023-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Mercord → Montana Rockworks Inc; 2023-01-07 to current/open; source msha-controller-operator-history