# Relationship history for MSHA mine 0501149

Current hierarchy: **Energy Fuels Incorporated → Energy Fuels Resources → Farmer Girl**

- 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:** Durfee Mining Company → Farmer Girl; 1950-01-01 to 1983-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Durfee Fred → Farmer Girl; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Durfee Fred → Durfee Mining Company; 1950-01-01 to 1983-05-09; source msha-controller-operator-history
- **operator_operates_mine:** Jack A Sage Mining → Farmer Girl; 1983-05-10 to 2006-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Sage Jack A → Farmer Girl; 1983-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sage Jack A → Jack A Sage Mining; 1983-05-10 to 2006-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Incorporated → Farmer Girl; 2006-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Energy Fuels Resources → Farmer Girl; 2006-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Incorporated → Energy Fuels Resources; 2006-10-01 to current/open; source msha-controller-operator-history