# Relationship history for MSHA mine 0502266

Current hierarchy: **Pike'S Peak Mining Company & Golden Cycle Gold Cor → Cripple Creek & Victor Gold Mining Company → Ajax Mine**

- 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

- **controller_controls_mine:** Hecla Mining Company → Ajax Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Texasgulf Metals Company → Ajax Mine; 1950-01-01 to 1983-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Pike'S Peak Mining Company & Golden Cycle Gold Cor → Ajax Mine; 1950-01-01 to 1983-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Pike'S Peak Mining Company & Golden Cycle Gold Cor → Texasgulf Metals Company; 1950-01-01 to 1983-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Hecla Mining Company → Ajax Mine; 1983-10-01 to 1984-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Hecla Mining Company → Hecla Mining Company; 1983-10-01 to 1984-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Cripple Creek & Victor Gold Mining Company → Ajax Mine; 1984-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pike'S Peak Mining Company & Golden Cycle Gold Cor → Ajax Mine; 1984-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pike'S Peak Mining Company & Golden Cycle Gold Cor → Cripple Creek & Victor Gold Mining Company; 1984-11-01 to current/open; source msha-controller-operator-history