# Relationship history for MSHA mine 4103866

Current hierarchy: **Masters Walter → Masters Construction → Jenschke**

- 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:** Masters Construction → Jenschke; 1995-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Masters Walter → Jenschke; 1995-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Masters Walter → Masters Construction; 1995-07-01 to current/open; source msha-controller-operator-history