# Relationship history for MSHA mine 3605891

Current hierarchy: **Guarna Vincent Jr & Anthony → H & M Coal Company → Little Buck Slope**

- 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:** Sluck Joseph--Joseph Biscoe & Joseph Sabol → Little Buck Slope; 1975-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sluck Coal Company → Little Buck Slope; 1975-12-05 to 1978-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Sluck Joseph--Joseph Biscoe & Joseph Sabol → Sluck Coal Company; 1975-12-05 to 1978-04-30; source msha-controller-operator-history
- **operator_operates_mine:** H & M Coal Company → Little Buck Slope; 1978-05-01 to 1984-09-17; source msha-controller-operator-history
- **controller_controls_mine:** David Harry → Little Buck Slope; 1978-05-01 to 1984-09-17; source msha-controller-operator-history
- **controller_controls_operator:** David Harry → H & M Coal Company; 1978-05-01 to 1984-09-17; source msha-controller-operator-history
- **operator_operates_mine:** H & M Coal Company → Little Buck Slope; 1984-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Guarna Vincent Jr & Anthony → Little Buck Slope; 1984-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guarna Vincent Jr & Anthony → H & M Coal Company; 1984-09-18 to current/open; source msha-controller-operator-history