# Relationship history for MSHA mine 1511168

Current hierarchy: **Sullivan Darius L & James R → Sullivan Brothers Coal Company → No 18-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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Salyers Gene & William Stiltner → No 18-C; 1977-03-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** V & R Coal Company → No 18-C; 1978-04-01 to 1979-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Mack & Terry Moore → No 18-C; 1978-04-01 to 1979-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Mack & Terry Moore → V & R Coal Company; 1978-04-01 to 1979-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Sullivan Darius L & James R → No 18-C; 1978-09-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stiltner & Salyers Coal Company → No 18-C; 1979-10-12 to 1980-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Gene & William Stiltner → Stiltner & Salyers Coal Company; 1979-10-12 to 1980-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Collins Coal Company → No 18-C; 1980-03-18 to 1981-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Collins Goebel → No 18-C; 1980-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Collins Goebel → Collins Coal Company; 1980-03-18 to 1981-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Sullivan Brothers Coal Company → No 18-C; 1981-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sullivan Darius L & James R → Sullivan Brothers Coal Company; 1981-09-11 to current/open; source msha-controller-operator-history