# Relationship history for MSHA mine 1516118

Current hierarchy: **Cooley Caleb → Cedar Gap Corp → No 1 Auger**

- 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:** Cedar Gap Corp → No 1 Auger; 1987-08-01 to 1988-04-27; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Larry & Garry → No 1 Auger; 1987-08-01 to 1988-04-27; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Larry & Garry → Cedar Gap Corp; 1987-08-01 to 1988-04-27; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Gap Corp → No 1 Auger; 1988-04-28 to 1988-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Hall Claude Jr → No 1 Auger; 1988-04-28 to 1988-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Hall Claude Jr → Cedar Gap Corp; 1988-04-28 to 1988-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Gap Corp → No 1 Auger; 1988-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cooley Caleb → No 1 Auger; 1988-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cooley Caleb → Cedar Gap Corp; 1988-07-13 to current/open; source msha-controller-operator-history