# Relationship history for MSHA mine 0102748

Current hierarchy: **Rand S  Clark → R C Enterprises → Stovall-Files**

- 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:** Costain Group PLC → Stovall-Files; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Costain Coal Inc → Stovall-Files; 1987-11-01 to 1992-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Costain Coal Inc; 1987-11-01 to 1992-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Rand S  Clark → Stovall-Files; 1991-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R C Enterprises → Stovall-Files; 1992-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rand S  Clark → R C Enterprises; 1992-08-12 to current/open; source msha-controller-operator-history