# Relationship history for MSHA mine 2003635

Current hierarchy: **William  Kirschner → Bill Kirschner Jr. Trucking & Forest Products → Limestone 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:** Bill Kirschner Jr. Trucking and Forrest Products → Limestone 1; 2022-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Kirschner → Limestone 1; 2022-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Kirschner → Bill Kirschner Jr. Trucking and Forrest Products; 2022-10-04 to current/open; source msha-controller-operator-history