# Relationship history for MSHA mine 1514184

Current hierarchy: **Horizon Natural Resources Incorporated → Addington Inc → Copperas Creek Job #11**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Fossil Fuels Inc → Copperas Creek Job #11; 1979-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Delta Energy Corp → Copperas Creek Job #11; 1983-08-01 to 1986-01-18; source msha-controller-operator-history
- **controller_controls_operator:** Fossil Fuels Inc → Delta Energy Corp; 1983-08-01 to 1986-01-18; source msha-controller-operator-history
- **controller_controls_mine:** Horizon Natural Resources Incorporated → Copperas Creek Job #11; 1983-08-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Addington Inc → Copperas Creek Job #11; 1986-01-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Addington Inc; 1986-01-19 to current/open; source msha-controller-operator-history