# Relationship history for MSHA mine 4801478

Current hierarchy: **Rtz-Cra Group & U S Energy/Crested Corp → Green Mountain Mining Venture → JACKPOT 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:** Green Mountain Mining Venture → JACKPOT MINE; 1987-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rtz-Cra Group & U S Energy/Crested Corp → JACKPOT MINE; 1987-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rtz-Cra Group & U S Energy/Crested Corp → Green Mountain Mining Venture; 1987-12-01 to current/open; source msha-controller-operator-history