# Relationship history for MSHA mine 2104058

Current hierarchy: **Darin A Ilgen et; Brenda  Ilgen → Ilgen Excavating Inc → Lahr 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:** Ilgen Excavating Inc → Lahr Pit; 2023-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brenda  Ilgen et al → Lahr Pit; 2023-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brenda  Ilgen et al → Ilgen Excavating Inc; 2023-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darin A Ilgen et → Ilgen Excavating Inc; 2023-09-25 to current/open; source msha-controller-operator-history