# Relationship history for MSHA mine 4003019

Current hierarchy: **James D  Wright → T C Stone Inc → T C Stone Incorporated**

- 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:** Grady M  Reavis → T C Stone Incorporated; 1981-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fayetteville Rock Company → T C Stone Incorporated; 1989-10-01 to 1989-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Grady M  Reavis → Fayetteville Rock Company; 1989-10-01 to 1989-12-31; source msha-controller-operator-history
- **operator_operates_mine:** T C Stone Inc → T C Stone Incorporated; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James D  Wright → T C Stone Incorporated; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James D  Wright → T C Stone Inc; 1990-01-01 to current/open; source msha-controller-operator-history