# Relationship history for MSHA mine 4403539

Current hierarchy: **William  Taylor; Randolph  Taylor → Toano Contractors, Inc. → GSM #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** R T Armistead & L Hanson → GSM #1; 1950-01-01 to 2015-03-16; source msha-controller-operator-history
- **controller_controls_mine:** R T Armistead & L Hanson → GSM #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R T Armistead & L Hanson → R T Armistead & L Hanson; 1950-01-01 to 2015-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Longhill Excavating II, LLC → GSM #1; 2015-03-17 to 2016-09-30; source msha-controller-operator-history
- **controller_controls_mine:** R T Armistead & L Hanson → GSM #1; 2015-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R T Armistead & L Hanson → Longhill Excavating II, LLC; 2015-03-17 to 2016-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Longhill Excavating → GSM #1; 2016-10-01 to 2019-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Matthew E  Minor → GSM #1; 2016-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew E  Minor → Longhill Excavating; 2016-10-01 to 2019-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Toano Contractors, Inc. → GSM #1; 2019-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randolph  Taylor et al → GSM #1; 2019-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randolph  Taylor et al → Toano Contractors, Inc.; 2019-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Taylor et al → Toano Contractors, Inc.; 2019-04-18 to current/open; source msha-controller-operator-history