# Relationship history for MSHA mine 2103294

Current hierarchy: **Patrick J  Dresel → Dresels Aggregate, Inc. → Portable #2**

- 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

- **controller_controls_mine:** Patrick J  Dresel → Portable #2; 1989-05-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dresels Aggregate, Inc. → Portable #2; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick J  Dresel → Dresels Aggregate, Inc.; 2001-06-01 to current/open; source msha-controller-operator-history