# Relationship history for MSHA mine 3607384

Current hierarchy: **Kenneth M  Pollock → Hud Inc → Emerald Anthracite**

- 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:** Emerald Anthracite → Emerald Anthracite; 1982-10-01 to 1986-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Ryan Coal Inc et al → Emerald Anthracite; 1982-10-01 to 1986-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Ryan Coal Inc et al → Emerald Anthracite; 1982-10-01 to 1986-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Hud Inc → Emerald Anthracite; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth M  Pollock et al → Emerald Anthracite; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth M  Pollock et al → Hud Inc; 1986-12-01 to current/open; source msha-controller-operator-history