# Relationship history for MSHA mine 2902567

Current hierarchy: **Stephen  Erickson; Jeff  Warren → New Mexico Humate → Fire Rock 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:** New Mexico Humate → Fire Rock Mine; 2025-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Warren et al → Fire Rock Mine; 2025-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Warren et al → New Mexico Humate; 2025-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Erickson et al → New Mexico Humate; 2025-05-01 to current/open; source msha-controller-operator-history