# Relationship history for MSHA mine 1700612

Current hierarchy: **Tingley Terrence H Sr → T H Tingely Inc → T H Tingley 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** T H Tingely Inc → T H Tingley Incorporated; 1992-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tingley Terrence H Sr → T H Tingley Incorporated; 1992-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tingley Terrence H Sr → T H Tingely Inc; 1992-12-01 to current/open; source msha-controller-operator-history