# Relationship history for MSHA mine 4104060

Current hierarchy: **Jacky  Messer; Johnnie  Messer → Messer Construction Company Inc → Dawn 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Messer Construction Company Inc → Dawn Pit; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jacky  Messer et al → Dawn Pit; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacky  Messer et al → Messer Construction Company Inc; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnnie  Messer et al → Messer Construction Company Inc; 1999-02-01 to current/open; source msha-controller-operator-history