# Relationship history for MSHA mine 4104301

Current hierarchy: **Travis E  Nech → T M & J Quarry → T M & J QUARY #1**

- 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 M & J Quarry → T M & J QUARY #1; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Travis E  Nech → T M & J QUARY #1; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis E  Nech → T M & J Quarry; 2001-07-01 to current/open; source msha-controller-operator-history