# Relationship history for MSHA mine 0504707

Current hierarchy: **Troy J Hicks; Maggie S Choice; Tyler J Hicks → TJH Stone Ltd → Hankins Stone Quarry #1**

- 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:** Fred  Holley  et al → Hankins Stone Quarry #1; 2001-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H & H Stone Inc → Hankins Stone Quarry #1; 2001-05-01 to 2002-09-18; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Holley  et al → H & H Stone Inc; 2001-05-01 to 2002-09-18; source msha-controller-operator-history
- **controller_controls_operator:** Marty  Holley  et al → H & H Stone Inc; 2001-05-01 to 2002-09-18; source msha-controller-operator-history
- **operator_operates_mine:** Hankins Stone Inc. → Hankins Stone Quarry #1; 2002-09-19 to 2020-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Hankins → Hankins Stone Quarry #1; 2002-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Hankins → Hankins Stone Inc.; 2002-09-19 to 2020-06-30; source msha-controller-operator-history
- **operator_operates_mine:** TJH Stone Ltd → Hankins Stone Quarry #1; 2020-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tyler J Hicks et al → Hankins Stone Quarry #1; 2020-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tyler J Hicks et al → TJH Stone Ltd; 2020-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maggie S Choice et al → TJH Stone Ltd; 2020-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Troy J Hicks et al → TJH Stone Ltd; 2020-07-01 to current/open; source msha-controller-operator-history