# Relationship history for MSHA mine 4607826

Current hierarchy: **Joseph C  Turley III → Leckie Smokeless Coal Company → Surface Mine No 202**

- 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:** Joseph C  Turley III et al → Surface Mine No 202; 1987-10-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leckie Smokeless Coal Company → Surface Mine No 202; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph C  Turley III et al → Leckie Smokeless Coal Company; 1990-01-01 to current/open; source msha-controller-operator-history