# Relationship history for MSHA mine 3606031

Current hierarchy: **Shadle Darryl A → Shadle Coal Company → Shadle 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** A & J Coal Company → Shadle Slope; 1976-03-01 to 1989-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Kroh John Et Al → Shadle Slope; 1976-03-01 to 1989-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Kroh John Et Al → A & J Coal Company; 1976-03-01 to 1989-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Shadle Coal Company → Shadle Slope; 1989-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shadle Darryl A → Shadle Slope; 1989-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shadle Darryl A → Shadle Coal Company; 1989-04-12 to current/open; source msha-controller-operator-history