# Relationship history for MSHA mine 3607629

Current hierarchy: **Rightler Keith → White Oak Coal → First Chance Slope**

- 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:** New Lincoln Coal Company → First Chance Slope; 1984-10-01 to 1985-10-07; source msha-controller-operator-history
- **controller_controls_mine:** Madenford Larry → First Chance Slope; 1984-10-01 to 1985-10-07; source msha-controller-operator-history
- **controller_controls_operator:** Madenford Larry → New Lincoln Coal Company; 1984-10-01 to 1985-10-07; source msha-controller-operator-history
- **operator_operates_mine:** New Lincoln Coal Company Inc → First Chance Slope; 1985-10-08 to 1993-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Reiner William → First Chance Slope; 1985-10-08 to 1993-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Reiner William → New Lincoln Coal Company Inc; 1985-10-08 to 1993-06-23; source msha-controller-operator-history
- **operator_operates_mine:** K & S Coal Company → First Chance Slope; 1993-06-24 to 1997-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Kroh John Jr & Wayne Shade → First Chance Slope; 1993-06-24 to 1997-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Kroh John Jr & Wayne Shade → K & S Coal Company; 1993-06-24 to 1997-03-30; source msha-controller-operator-history
- **operator_operates_mine:** White Oak Coal → First Chance Slope; 1997-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rightler Keith → First Chance Slope; 1997-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rightler Keith → White Oak Coal; 1997-03-31 to current/open; source msha-controller-operator-history