# Relationship history for MSHA mine 1512377

Current hierarchy: **Clark Russell → Gala Enterprises Inc → No 3 Mine**

- 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:** Mitchell Tex-Lowell & Rex → No 3 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T & R Coal Company Inc → No 3 Mine; 1980-06-01 to 1981-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell Tex-Lowell & Rex → T & R Coal Company Inc; 1980-06-01 to 1981-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Vaughn Estille & Dennis R Caldwell → No 3 Mine; 1980-06-01 to 1984-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Gala Enterprises Inc → No 3 Mine; 1981-03-18 to 1983-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Vaughn Estille & Dennis R Caldwell → Gala Enterprises Inc; 1981-03-18 to 1983-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Gala Enterprises Inc → No 3 Mine; 1983-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark Russell → No 3 Mine; 1983-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark Russell → Gala Enterprises Inc; 1983-12-14 to current/open; source msha-controller-operator-history