# Relationship history for MSHA mine 1518933

Current hierarchy: **L-M Holdings Inc; Steve L Lawson; Shelbi M Lawson; Steve A Lawson; Tyler → Rockcastle Materials → Rockcastle County Quarry**

- 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:** Hi-View, LLC → Rockcastle County Quarry; 2012-11-27 to 2019-09-02; source msha-controller-operator-history
- **controller_controls_mine:** Donnie  Hill et al → Rockcastle County Quarry; 2012-11-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donnie  Hill et al → Hi-View, LLC; 2012-11-27 to 2019-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Hill et al → Hi-View, LLC; 2012-11-27 to 2019-09-02; source msha-controller-operator-history
- **operator_operates_mine:** ROCK & DIRT, LLC → Rockcastle County Quarry; 2019-09-03 to 2021-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Hill et al → Rockcastle County Quarry; 2019-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Hill et al → ROCK & DIRT, LLC; 2019-09-03 to 2021-07-01; source msha-controller-operator-history
- **controller_controls_operator:** Julie  Hill et al → ROCK & DIRT, LLC; 2019-09-03 to 2021-07-01; source msha-controller-operator-history
- **operator_operates_mine:** Rockcastle Materials → Rockcastle County Quarry; 2021-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve L Lawson Et Al → Rockcastle County Quarry; 2021-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve L Lawson Et Al → Rockcastle Materials; 2021-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tyler G Lawson Et Al → Rockcastle Materials; 2021-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve A Lawson Et Al → Rockcastle Materials; 2021-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shelbi M Lawson Et Al → Rockcastle Materials; 2021-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L-M Holdings Inc Et Al → Rockcastle Materials; 2021-07-02 to current/open; source msha-controller-operator-history