# Relationship history for MSHA mine 3607528

Current hierarchy: **Rodak Mark J → Alpine Coal Company Inc → Slope No 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Renegade Coal Company Inc → Slope No 1; 1984-01-01 to 1989-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Kristoff James J & Michael → Slope No 1; 1984-01-01 to 1989-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Kristoff James J & Michael → Renegade Coal Company Inc; 1984-01-01 to 1989-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Alpine Coal Company Inc → Slope No 1; 1989-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rodak Mark J Et Al → Slope No 1; 1989-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodak Mark J Et Al → Alpine Coal Company Inc; 1989-03-21 to current/open; source msha-controller-operator-history