# Relationship history for MSHA mine 4202571

Current hierarchy: **Terry  Messersmith → OAK CREEK ROCK PRODUCTS, LLC → DEEP CREEK PORTABLE**

- 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:** TNT General Contractors → DEEP CREEK PORTABLE; 2011-03-17 to 2025-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Terry  Messersmith → DEEP CREEK PORTABLE; 2011-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Messersmith → TNT General Contractors; 2011-03-17 to 2025-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Terry  Messersmith → DEEP CREEK PORTABLE; 2017-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** OAK CREEK ROCK PRODUCTS, LLC → DEEP CREEK PORTABLE; 2025-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Messersmith → OAK CREEK ROCK PRODUCTS, LLC; 2025-05-13 to current/open; source msha-controller-operator-history