# Relationship history for MSHA mine 2103299

Current hierarchy: **Ervin  Herdering → Herdering Inc. → Big Crusher Herdering Inc.**

- 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:** Herdering Inc. → Big Crusher Herdering Inc.; 2001-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ervin  Herdering → Big Crusher Herdering Inc.; 2001-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ervin  Herdering → Herdering Inc.; 2001-09-18 to current/open; source msha-controller-operator-history