# Relationship history for MSHA mine 1516561

Current hierarchy: **Steven R  Mullins → Jasper Coal Inc → No 1 Strip**

- 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:** Myke Coal Inc → No 1 Strip; 1989-02-01 to 1989-09-25; source msha-controller-operator-history
- **controller_controls_mine:** De Roberts Lawrence A → No 1 Strip; 1989-02-01 to 1989-09-25; source msha-controller-operator-history
- **controller_controls_operator:** De Roberts Lawrence A → Myke Coal Inc; 1989-02-01 to 1989-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Jasper Coal Inc → No 1 Strip; 1989-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven R  Mullins → No 1 Strip; 1989-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven R  Mullins → Jasper Coal Inc; 1989-09-26 to current/open; source msha-controller-operator-history