# Relationship history for MSHA mine 4603765

Current hierarchy: **Lester Danny → Perry Branch Coal Company → No 1 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:** Lester Kenneth → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K & L Coal Co → No 1 Mine; 1973-01-01 to 1974-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Lester Kenneth → K & L Coal Co; 1973-01-01 to 1974-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Perry Branch Coal Company → No 1 Mine; 1974-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lester Danny → No 1 Mine; 1974-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lester Danny → Perry Branch Coal Company; 1974-04-16 to current/open; source msha-controller-operator-history