# Relationship history for MSHA mine 4503393

Current hierarchy: **John  Brumfield → Brumfield Construction, Inc → Kirkpatrick 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

- **operator_operates_mine:** MJR Ltd → Kirkpatrick Pit; 1999-04-01 to 2020-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Maria  Andrews et al → Kirkpatrick Pit; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maria  Andrews et al → MJR Ltd; 1999-04-01 to 2020-03-22; source msha-controller-operator-history
- **controller_controls_mine:** John  Brumfield → Kirkpatrick Pit; 2017-03-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brumfield Construction, Inc → Kirkpatrick Pit; 2020-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Brumfield → Brumfield Construction, Inc; 2020-03-23 to current/open; source msha-controller-operator-history