# Relationship history for MSHA mine 2103551

Current hierarchy: **Travis R Hemker → Brannt Valley Inc → Crushing 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:** Travis R  Hemker et al → Crushing Plant; 2001-04-01 to 2016-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Royal Johnson → Crushing Plant; 2006-08-08 to 2026-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Royal J  Johnson → Crushing Plant; 2006-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Royal J  Johnson → Royal Johnson; 2006-08-08 to 2026-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Travis R Hemker → Crushing Plant; 2016-06-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brannt Valley Inc → Crushing Plant; 2026-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis R Hemker → Brannt Valley Inc; 2026-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis R  Hemker et al → Brannt Valley Inc; 2026-08-17 to 2016-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Hemker et al → Brannt Valley Inc; 2026-08-17 to 2016-06-26; source msha-controller-operator-history