# Relationship history for MSHA mine 2402613

Current hierarchy: **Robert A  Hagemeister Jr; Lonnie J  Hagemeister → Excel Industries, Inc. → Keestrack Screen Plant**

- 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:** Lonnie J  Hagemeister et al → Keestrack Screen Plant; 2011-11-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Excel Industries, Inc. → Keestrack Screen Plant; 2012-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lonnie J  Hagemeister et al → Excel Industries, Inc.; 2012-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Hagemeister Jr et al → Excel Industries, Inc.; 2012-02-20 to current/open; source msha-controller-operator-history