# Relationship history for MSHA mine 3605207

Current hierarchy: **Apex Oil Company → Colt Resources Inc → Colt Strips**

- 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:** Colt Resources Inc → Colt Strips; 1950-01-01 to 1981-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Uzmack James → Colt Strips; 1950-01-01 to 1981-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Uzmack James → Colt Resources Inc; 1950-01-01 to 1981-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Colt Resources Inc → Colt Strips; 1981-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Apex Oil Company → Colt Strips; 1981-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Apex Oil Company → Colt Resources Inc; 1981-11-18 to current/open; source msha-controller-operator-history