# Relationship history for MSHA mine 4406393

Current hierarchy: **Strouth Philmon → Phil Strouth Coal Company → No 14**

- 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:** Strouth Philmon Et Al → No 14; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hansel D  Fleming → No 14; 1981-08-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kelly Energy Company Inc → No 14; 1987-07-01 to 1987-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Hansel D  Fleming → Kelly Energy Company Inc; 1987-07-01 to 1987-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Ponderosa Coal Corp → No 14; 1987-12-14 to 1988-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Akers Larry W → No 14; 1987-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Akers Larry W → Ponderosa Coal Corp; 1987-12-14 to 1988-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Phil Strouth Coal Company → No 14; 1988-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Strouth Philmon Et Al → Phil Strouth Coal Company; 1988-04-12 to current/open; source msha-controller-operator-history