# Relationship history for MSHA mine 4605440

Current hierarchy: **Crook Norman E → Fire Creek Fuels Inc → Firecreek #1**

- 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

- **operator_operates_mine:** Firecreek Fuel Inc → Firecreek #1; 1977-03-01 to 1980-11-24; source msha-controller-operator-history
- **controller_controls_mine:** Muscari Samuel A → Firecreek #1; 1977-03-01 to 1980-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Muscari Samuel A → Firecreek Fuel Inc; 1977-03-01 to 1980-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Big Sue Coal Company Inc → Firecreek #1; 1980-11-25 to 1981-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Ellis Charlie R → Firecreek #1; 1980-11-25 to 1981-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Ellis Charlie R → Big Sue Coal Company Inc; 1980-11-25 to 1981-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Sweet Water Mining Inc → Firecreek #1; 1981-06-25 to 1981-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Mc Kinney Carolyn → Firecreek #1; 1981-06-25 to 1981-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Mc Kinney Carolyn → Sweet Water Mining Inc; 1981-06-25 to 1981-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Fire Creek Fuels Inc → Firecreek #1; 1981-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crook Norman E → Firecreek #1; 1981-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crook Norman E → Fire Creek Fuels Inc; 1981-09-11 to current/open; source msha-controller-operator-history