# Relationship history for MSHA mine 0503977

Current hierarchy: **Thomas E  VanCura; Randall S  Burks → Western States Minerals, LLC → Combination Placer**

- 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:** Thomas R  Young → Combination Placer; 1983-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Minerals Inc → Combination Placer; 1984-07-01 to 2015-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Thomas R  Young → Minerals Inc; 1984-07-01 to 2015-08-28; source msha-controller-operator-history
- **operator_operates_mine:** Western States Minerals, LLC → Combination Placer; 2015-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas E  VanCura et al → Combination Placer; 2015-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas E  VanCura et al → Western States Minerals, LLC; 2015-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randall S  Burks et al → Western States Minerals, LLC; 2015-08-29 to current/open; source msha-controller-operator-history