# Relationship history for MSHA mine 3606102

Current hierarchy: **Platko John → J A S Partnership → 4 Foot 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

- **controller_controls_mine:** Pewor Walter → 4 Foot Slope; 1973-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pewor Coal Co → 4 Foot Slope; 1976-05-28 to 1978-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Pewor Walter → Pewor Coal Co; 1976-05-28 to 1978-07-30; source msha-controller-operator-history
- **operator_operates_mine:** J A S Partnership → 4 Foot Slope; 1978-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Platko John Et Al → 4 Foot Slope; 1978-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Platko John Et Al → J A S Partnership; 1978-07-31 to current/open; source msha-controller-operator-history