# Relationship history for MSHA mine 2901922

Current hierarchy: **S F Minerals Corp → Santa Fe Mining Inc → Jones Hill**

- 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:** Santa Fe Mining Inc → Jones Hill; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** S F Minerals Corp → Jones Hill; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** S F Minerals Corp → Santa Fe Mining Inc; 1983-07-01 to current/open; source msha-controller-operator-history