# Relationship history for MSHA mine 1506426

Current hierarchy: **Lester Kenneth → Equipment Salvage Sales & Recovery → Ba 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

- **operator_operates_mine:** White Post Coal Company → Ba Mine; 1950-01-01 to 1993-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Preece Monty → Ba Mine; 1950-01-01 to 1993-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Preece Monty → White Post Coal Company; 1950-01-01 to 1993-10-11; source msha-controller-operator-history
- **operator_operates_mine:** M & P Land Corp → Ba Mine; 1993-10-12 to 1994-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Slater Gwen → Ba Mine; 1993-10-12 to 1994-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Slater Gwen → M & P Land Corp; 1993-10-12 to 1994-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Equipment Salvage Sales & Recovery → Ba Mine; 1994-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lester Kenneth → Ba Mine; 1994-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lester Kenneth → Equipment Salvage Sales & Recovery; 1994-06-29 to current/open; source msha-controller-operator-history