# Relationship history for MSHA mine 2104007

Current hierarchy: **Mark S Holter → Holter Repair N Trucking → Holter Power Screen**

- 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:** Holter Repair N Trucking → Holter Power Screen; 2021-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark S Holter → Holter Power Screen; 2021-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark S Holter → Holter Repair N Trucking; 2021-06-08 to current/open; source msha-controller-operator-history