# Relationship history for MSHA mine 0404536

Current hierarchy: **Hyatt James R → G P Mining Company → Omega 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

- **operator_operates_mine:** Omega Associates → Omega Mine; 1981-09-01 to 1991-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Quartz Mt Exploration & R E Dodge Mineral Testing → Omega Mine; 1981-09-01 to 1991-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Quartz Mt Exploration & R E Dodge Mineral Testing → Omega Associates; 1981-09-01 to 1991-05-07; source msha-controller-operator-history
- **operator_operates_mine:** G P Mining Company → Omega Mine; 1991-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hyatt James R → Omega Mine; 1991-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hyatt James R → G P Mining Company; 1991-05-08 to current/open; source msha-controller-operator-history