# Relationship history for MSHA mine 4607337

Current hierarchy: **William E  Konya; Steve A  Konya → Miami Coal Company → #17 Sardis Mine**

- 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:** Steve A  Konya et al → #17 Sardis Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 3 Power Coal Inc → #17 Sardis Mine; 1987-07-01 to 1989-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Morgan Joseph D & Gary D → #17 Sardis Mine; 1987-07-01 to 1989-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Morgan Joseph D & Gary D → 3 Power Coal Inc; 1987-07-01 to 1989-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Lappitt Inc → #17 Sardis Mine; 1989-01-09 to 1990-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Albert F  Robinson → #17 Sardis Mine; 1989-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Albert F  Robinson → Lappitt Inc; 1989-01-09 to 1990-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Miami Coal Company → #17 Sardis Mine; 1990-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve A  Konya et al → Miami Coal Company; 1990-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William E  Konya et al → Miami Coal Company; 1990-10-17 to current/open; source msha-controller-operator-history