# Relationship history for MSHA mine 4606342

Current hierarchy: **Koch Industries Inc → Reiss Viking Division → REISS VIKING DIVISION OF THE C.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** C Reiss Coal Company → REISS VIKING DIVISION OF THE C.; 1981-01-01 to 1986-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Gauley Industries Inc → REISS VIKING DIVISION OF THE C.; 1981-06-01 to 1983-11-21; source msha-controller-operator-history
- **controller_controls_mine:** Coffindaffer B L → REISS VIKING DIVISION OF THE C.; 1981-06-01 to 1983-11-21; source msha-controller-operator-history
- **controller_controls_operator:** Coffindaffer B L → Gauley Industries Inc; 1981-06-01 to 1983-11-21; source msha-controller-operator-history
- **operator_operates_mine:** Reiss Viking Corp → REISS VIKING DIVISION OF THE C.; 1983-11-22 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** C Reiss Coal Company → Reiss Viking Corp; 1983-11-22 to 1986-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Reiss Viking Division → REISS VIKING DIVISION OF THE C.; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Koch Industries Inc → REISS VIKING DIVISION OF THE C.; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → Reiss Viking Division; 1987-01-01 to current/open; source msha-controller-operator-history