# Relationship history for MSHA mine 1515657

Current hierarchy: **Hobart  Anderson → Sarah Ashley Mining Company Inc → No 1**

- 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:** Justice Branch Coal Company Inc → No 1; 1986-06-01 to 1990-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Kiser Donald → No 1; 1986-06-01 to 1990-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Kiser Donald → Justice Branch Coal Company Inc; 1986-06-01 to 1990-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Sarah Ashley Mining Company Inc → No 1; 1990-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hobart  Anderson  et al → No 1; 1990-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hobart  Anderson  et al → Sarah Ashley Mining Company Inc; 1990-03-14 to current/open; source msha-controller-operator-history