# Relationship history for MSHA mine 4606521

Current hierarchy: **Dawson Karl R Iii → Srj Energy Inc → Camelot**

- 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:** Camelot Fuels Inc → Camelot; 1982-05-01 to 1984-06-10; source msha-controller-operator-history
- **controller_controls_mine:** Schmidt William Loren → Camelot; 1982-05-01 to 1984-06-10; source msha-controller-operator-history
- **controller_controls_operator:** Schmidt William Loren → Camelot Fuels Inc; 1982-05-01 to 1984-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Srj Energy Inc → Camelot; 1984-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dawson Karl R Iii → Camelot; 1984-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dawson Karl R Iii → Srj Energy Inc; 1984-06-11 to current/open; source msha-controller-operator-history