# Relationship history for MSHA mine 0100856

Current hierarchy: **Milam Jay E → Mineral Springs Mining Company Inc → No 1 Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Mineral Springs Mining Company → No 1 Pit; 1950-01-01 to 1978-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Osborne C O → No 1 Pit; 1950-01-01 to 1978-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Osborne C O → Mineral Springs Mining Company; 1950-01-01 to 1978-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Mineral Springs Mining Company Inc → No 1 Pit; 1978-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Milam Jay E → No 1 Pit; 1978-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milam Jay E → Mineral Springs Mining Company Inc; 1978-05-08 to current/open; source msha-controller-operator-history