# Relationship history for MSHA mine 2401689

Current hierarchy: **Harvey L Ostermiller → H L Ostermiller Construction Inc → H L Ostermiller Const. Inc**

- 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:** H L Ostermiller Construction Inc → H L Ostermiller Const. Inc; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harvey L Ostermiller → H L Ostermiller Const. Inc; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harvey L Ostermiller → H L Ostermiller Construction Inc; 1982-09-01 to current/open; source msha-controller-operator-history