# Relationship history for MSHA mine 1502622

Current hierarchy: **Taylor Leeman → Light Star Coal Company Inc → No 1**

- 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:** Sexton & Sons Coal Company → No 1; 1950-01-01 to 1973-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Sexton & Sons Coal Company → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sexton & Sons Coal Company → Sexton & Sons Coal Company; 1950-01-01 to 1973-08-31; source msha-controller-operator-history
- **operator_operates_mine:** T & M Coal Corp → No 1; 1973-09-01 to 1974-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Melvin  Taylor → No 1; 1973-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melvin  Taylor → T & M Coal Corp; 1973-09-01 to 1974-01-31; source msha-controller-operator-history
- **controller_controls_mine:** M C N Coal Company → No 1; 1974-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M C N Coal Company → No 1; 1974-02-01 to 1974-04-30; source msha-controller-operator-history
- **controller_controls_operator:** M C N Coal Company → M C N Coal Company; 1974-02-01 to 1974-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Light Star Coal Company Inc → No 1; 1974-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Leeman → No 1; 1974-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Leeman → Light Star Coal Company Inc; 1974-05-01 to current/open; source msha-controller-operator-history