# Relationship history for MSHA mine 4103254

Current hierarchy: **Assadi Mohammad R → Sandco Inc → Kosse 5a Crushed 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:** Kosse 5a Crushed Stone → Kosse 5a Crushed Stone; 1984-08-01 to 1987-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Arney Travis → Kosse 5a Crushed Stone; 1984-08-01 to 1987-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Arney Travis → Kosse 5a Crushed Stone; 1984-08-01 to 1987-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Assadi Mohammad R → Kosse 5a Crushed Stone; 1987-02-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sandco Inc → Kosse 5a Crushed Stone; 1987-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Assadi Mohammad R → Sandco Inc; 1987-08-11 to current/open; source msha-controller-operator-history