# Relationship history for MSHA mine 1202408

Current hierarchy: **Dallas D  Day → Fox Contractors Corp. → Kimmell Sand and Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Larry  Hixson → Kimmell Sand and Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hixson Sand & Gravel Inc → Kimmell Sand and Gravel; 2008-04-30 to 2023-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Hixson → Hixson Sand & Gravel Inc; 2008-04-30 to 2023-08-06; source msha-controller-operator-history
- **operator_operates_mine:** Fox Contractors Corp. → Kimmell Sand and Gravel; 2023-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dallas D  Day → Kimmell Sand and Gravel; 2023-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dallas D  Day → Fox Contractors Corp.; 2023-08-07 to current/open; source msha-controller-operator-history