# Relationship history for MSHA mine 3603458

Current hierarchy: **Travis  Martin; Rodney M  Martin; Trevor  Martin → Martin Stone Quarries Inc → Gabel 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:** Charles G Gabel Inc → Gabel Quarry; 1950-01-01 to 1985-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Charles G  Gabel → Gabel Quarry; 1950-01-01 to 1985-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Charles G  Gabel → Charles G Gabel Inc; 1950-01-01 to 1985-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Glenn  Martin et al → Gabel Quarry; 1950-01-01 to 2023-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Martin Stone Quarries Inc → Gabel Quarry; 1985-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn  Martin et al → Martin Stone Quarries Inc; 1985-04-08 to 2023-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Martin et al → Martin Stone Quarries Inc; 1985-04-08 to 2023-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Travis  Martin et al → Gabel Quarry; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis  Martin et al → Martin Stone Quarries Inc; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodney M  Martin et al → Martin Stone Quarries Inc; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trevor  Martin et al → Martin Stone Quarries Inc; 2024-01-01 to current/open; source msha-controller-operator-history