# Relationship history for MSHA mine 0504427

Current hierarchy: **Opfer Harvey E → Alma Resourcers Inc → Alma Resources Incorporated**

- 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:** Reclamation Resources Inc → Alma Resources Incorporated; 1989-10-01 to 1992-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Lazier Robert → Alma Resources Incorporated; 1989-10-01 to 1992-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Lazier Robert → Reclamation Resources Inc; 1989-10-01 to 1992-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Alma Resourcers Inc → Alma Resources Incorporated; 1992-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Opfer Harvey E → Alma Resources Incorporated; 1992-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Opfer Harvey E → Alma Resourcers Inc; 1992-07-17 to current/open; source msha-controller-operator-history