# Relationship history for MSHA mine 1516024

Current hierarchy: **Bennett Deborah M → Lazy Rock Coal Corp → 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:** Lazy Rock Coal Corp → No 1; 1987-05-01 to 1988-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Kellione Cletis-Howard Norman Et Al → No 1; 1987-05-01 to 1988-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Kellione Cletis-Howard Norman Et Al → Lazy Rock Coal Corp; 1987-05-01 to 1988-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Lazy Rock Coal Corp → No 1; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bennett Deborah M → No 1; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bennett Deborah M → Lazy Rock Coal Corp; 1988-03-01 to current/open; source msha-controller-operator-history