# Relationship history for MSHA mine 0404269

Current hierarchy: **Lowell  Robinson → Robinson Enterprises Inc → Upper Spanish 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:** Zane Hunt Mining Company → Upper Spanish Mine; 1978-03-09 to 1980-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Ostler Josie A Et Al → Upper Spanish Mine; 1978-03-09 to 1980-08-18; source msha-controller-operator-history
- **controller_controls_operator:** Ostler Josie A Et Al → Zane Hunt Mining Company; 1978-03-09 to 1980-08-18; source msha-controller-operator-history
- **operator_operates_mine:** Robinson Enterprises Inc → Upper Spanish Mine; 1980-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lowell  Robinson → Upper Spanish Mine; 1980-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lowell  Robinson → Robinson Enterprises Inc; 1980-08-19 to current/open; source msha-controller-operator-history