# Relationship history for MSHA mine 4104783

Current hierarchy: **Mark  Rogers → T & R Caliche LLC → Hereford Feedyard Pit**

- 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:** Jon  Barnett et al → Hereford Feedyard Pit; 2008-01-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Owl Feed Yard → Hereford Feedyard Pit; 2009-04-20 to 2012-07-02; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Johnson → Hereford Feedyard Pit; 2009-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Johnson → Owl Feed Yard; 2009-04-20 to 2012-07-02; source msha-controller-operator-history
- **operator_operates_mine:** Rock It Science Crushing → Hereford Feedyard Pit; 2012-07-03 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Jon  Barnett et al → Rock It Science Crushing; 2012-07-03 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Anthony  Rhodes et al → Rock It Science Crushing; 2012-07-03 to 2021-06-30; source msha-controller-operator-history
- **operator_operates_mine:** T & R Caliche LLC → Hereford Feedyard Pit; 2021-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Rogers → Hereford Feedyard Pit; 2021-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Rogers → T & R Caliche LLC; 2021-07-01 to current/open; source msha-controller-operator-history