# Relationship history for MSHA mine 0101118

Current hierarchy: **Witmyer Henry M Jr → Alabama Refractory Specialties Inc → ALABAMA REFRACTORY SPECIALIST,IN**

- 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

- **operator_operates_mine:** Alabama Refractory Clay Company Inc → ALABAMA REFRACTORY SPECIALIST,IN; 1950-01-01 to 1988-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Legg Catherine → ALABAMA REFRACTORY SPECIALIST,IN; 1950-01-01 to 1988-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Legg Catherine → Alabama Refractory Clay Company Inc; 1950-01-01 to 1988-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Refractory Specialties Inc → ALABAMA REFRACTORY SPECIALIST,IN; 1988-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Witmyer Henry M Jr → ALABAMA REFRACTORY SPECIALIST,IN; 1988-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Witmyer Henry M Jr → Alabama Refractory Specialties Inc; 1988-07-11 to current/open; source msha-controller-operator-history