# Relationship history for MSHA mine 1511981

Current hierarchy: **Geo-Energy Ltd → Bledsoe Deep Mining Company → Mine No 3**

- 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:** Cardinal Resources Inc → Mine No 3; 1978-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jasper Clyde Et Al → Mine No 3; 1979-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Resources Inc → Mine No 3; 1979-08-01 to 1980-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Cardinal Resources Inc → Cardinal Resources Inc; 1979-08-01 to 1980-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Jasper Deep Mining Inc → Mine No 3; 1980-05-01 to 1980-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Jasper Clyde Et Al → Jasper Deep Mining Inc; 1980-05-01 to 1980-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Deep Mining Company → Mine No 3; 1980-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Geo-Energy Ltd → Mine No 3; 1980-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Geo-Energy Ltd → Bledsoe Deep Mining Company; 1980-08-06 to current/open; source msha-controller-operator-history