# Relationship history for MSHA mine 0404070

Current hierarchy: **Lion Mines Ltd → Lion Mines Ltd (Usa) → El Dorado - Plumbago Mines Consolidated**

- 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:** New Aston Resources Inc → El Dorado - Plumbago Mines Consolidated; 1950-01-01 to 1980-06-15; source msha-controller-operator-history
- **controller_controls_mine:** New Aston Resources Inc → El Dorado - Plumbago Mines Consolidated; 1950-01-01 to 1980-06-15; source msha-controller-operator-history
- **controller_controls_operator:** New Aston Resources Inc → New Aston Resources Inc; 1950-01-01 to 1980-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Fry R F & Assoc Pacific Ltd → El Dorado - Plumbago Mines Consolidated; 1950-01-01 to 1981-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Pacific Mine Contractors Inc → El Dorado - Plumbago Mines Consolidated; 1980-06-16 to 1980-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Fry R F & Assoc Pacific Ltd → Pacific Mine Contractors Inc; 1980-06-16 to 1980-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Lion Mines Ltd (Usa) → El Dorado - Plumbago Mines Consolidated; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lion Mines Ltd → El Dorado - Plumbago Mines Consolidated; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lion Mines Ltd → Lion Mines Ltd (Usa); 1981-01-01 to current/open; source msha-controller-operator-history