# Relationship history for MSHA mine 4103438

Current hierarchy: **Jones Jimmy C Sr → Texas Stone Industries Inc → Texas Stone**

- 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:** Loop 12 Sand & Gravel Inc → Texas Stone; 1986-11-01 to 1987-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Longley D K → Texas Stone; 1986-11-01 to 1987-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Longley D K → Loop 12 Sand & Gravel Inc; 1986-11-01 to 1987-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Trinity Sand Inc → Texas Stone; 1987-05-01 to 1987-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Couch Gus L → Texas Stone; 1987-05-01 to 1987-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Couch Gus L → Trinity Sand Inc; 1987-05-01 to 1987-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Texas Stone Industries Inc → Texas Stone; 1987-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jones Jimmy C Sr → Texas Stone; 1987-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Jimmy C Sr → Texas Stone Industries Inc; 1987-08-17 to current/open; source msha-controller-operator-history