# Relationship history for MSHA mine 0502993

Current hierarchy: **Michael  Moore; Elvin I  Reed → Colorado Minerals Recovery Llc → CENTENNIAL**

- 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:** Brooks Minerals Inc → CENTENNIAL; 1950-01-01 to 1979-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Brooks Fred H → CENTENNIAL; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brooks Fred H → Brooks Minerals Inc; 1950-01-01 to 1979-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Newman Eric → CENTENNIAL; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Minerals Recovery Corp → CENTENNIAL; 1979-08-01 to 1989-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Newman Eric → Minerals Recovery Corp; 1979-08-01 to 1989-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Colorado Minerals Recovery Llc → CENTENNIAL; 1989-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elvin I  Reed  et al → CENTENNIAL; 1989-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elvin I  Reed  et al → Colorado Minerals Recovery Llc; 1989-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Moore  et al → Colorado Minerals Recovery Llc; 1989-10-23 to current/open; source msha-controller-operator-history