# Relationship history for MSHA mine 1513541

Current hierarchy: **Hobart  Anderson → Cross Gates Mining 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Cow Creek Construction Company Inc → No 1; 1982-06-01 to 1984-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Burl → No 1; 1982-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Burl → Cow Creek Construction Company Inc; 1982-06-01 to 1984-03-12; source msha-controller-operator-history
- **operator_operates_mine:** Crossgates Mining Company Inc → No 1; 1984-03-13 to 1987-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Reffett Virgil Et Al → No 1; 1984-03-13 to 1987-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Reffett Virgil Et Al → Crossgates Mining Company Inc; 1984-03-13 to 1987-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Cross Gates Mining Company Inc → No 1; 1987-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hobart  Anderson  et al → No 1; 1987-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hobart  Anderson  et al → Cross Gates Mining Company Inc; 1987-04-21 to current/open; source msha-controller-operator-history