# Relationship history for MSHA mine 1511559

Current hierarchy: **Geo-Energy Ltd → Bledsoe Deep Mining Company → No 1 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:** Yates Randy B → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jimmy E  Hamilton et al → No 1 Mine; 1976-09-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Gem Coal Company Inc → No 1 Mine; 1978-09-01 to 1980-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy E  Hamilton et al → Tri-Gem Coal Company Inc; 1978-09-01 to 1980-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Geo-Energy Ltd → No 1 Mine; 1980-08-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kickapoo Coal Company → No 1 Mine; 1980-12-04 to 1981-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Yates Randy B → Kickapoo Coal Company; 1980-12-04 to 1981-07-08; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Deep Mining Company → No 1 Mine; 1981-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Geo-Energy Ltd → Bledsoe Deep Mining Company; 1981-07-09 to current/open; source msha-controller-operator-history