# Relationship history for MSHA mine 4605067

Current hierarchy: **Richard T  Hatfield; James E  Hatfield → Summit Collieries → Preparation Plant 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

- **controller_controls_mine:** Guyan Eagle Investment Company → Preparation Plant No 1; 1974-08-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Guyan Eagle Mining Company → Preparation Plant No 1; 1976-03-01 to 1980-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Guyan Eagle Investment Company → Guyan Eagle Mining Company; 1976-03-01 to 1980-11-19; source msha-controller-operator-history
- **operator_operates_mine:** Guyan Eagle Mining Company → Preparation Plant No 1; 1980-11-20 to 1981-09-08; source msha-controller-operator-history
- **controller_controls_mine:** Winters Ken → Preparation Plant No 1; 1980-11-20 to 1981-09-08; source msha-controller-operator-history
- **controller_controls_operator:** Winters Ken → Guyan Eagle Mining Company; 1980-11-20 to 1981-09-08; source msha-controller-operator-history
- **operator_operates_mine:** G E M Inc → Preparation Plant No 1; 1981-09-09 to 1983-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Crabtree David A → Preparation Plant No 1; 1981-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crabtree David A → G E M Inc; 1981-09-09 to 1983-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Summit Collieries → Preparation Plant No 1; 1983-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard T  Hatfield et al → Preparation Plant No 1; 1983-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard T  Hatfield et al → Summit Collieries; 1983-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Hatfield et al → Summit Collieries; 1983-08-10 to current/open; source msha-controller-operator-history