# Relationship history for MSHA mine 4503836

Current hierarchy: **Keith  LaFountain → MSK Mining → Stampede Pass**

- 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

- **operator_operates_mine:** GCX LLC → Stampede Pass; 2022-12-20 to 2024-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Keith  LaFountain et al → Stampede Pass; 2022-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  LaFountain et al → GCX LLC; 2022-12-20 to 2024-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Halverson et al → GCX LLC; 2022-12-20 to 2024-06-25; source msha-controller-operator-history
- **operator_operates_mine:** MSK Mining → Stampede Pass; 2024-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Keith  LaFountain → Stampede Pass; 2024-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  LaFountain → MSK Mining; 2024-06-26 to current/open; source msha-controller-operator-history