# Relationship history for MSHA mine 2901797

Current hierarchy: **Terry  Truelock → Valley Incorporated → Valley #1 Tolar Pit**

- 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:** Howard Enterprises → Valley #1 Tolar Pit; 1980-01-01 to 1984-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Howard Joe & Bill → Valley #1 Tolar Pit; 1980-01-01 to 1984-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Howard Joe & Bill → Howard Enterprises; 1980-01-01 to 1984-05-23; source msha-controller-operator-history
- **operator_operates_mine:** Valley Incorporated → Valley #1 Tolar Pit; 1984-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry  Truelock → Valley #1 Tolar Pit; 1984-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Truelock → Valley Incorporated; 1984-05-24 to current/open; source msha-controller-operator-history