# Relationship history for MSHA mine 1102564

Current hierarchy: **Burks James L → Southern Illinois Mineral Corp → Vergennes Mine No 4**

- 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:** Dyer Robert → Vergennes Mine No 4; 1974-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Three States Trucking Inc → Vergennes Mine No 4; 1976-08-05 to 1977-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Dyer Robert → Three States Trucking Inc; 1976-08-05 to 1977-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Burks James L → Vergennes Mine No 4; 1977-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Illinois Mineral Corp → Vergennes Mine No 4; 1977-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Burks James L → Southern Illinois Mineral Corp; 1977-03-07 to current/open; source msha-controller-operator-history