# Relationship history for MSHA mine 4503780

Current hierarchy: **Bruce B  Seton → Seton Construction Inc. → Thorndyke 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

- **controller_controls_mine:** Bruce B  Seton → Thorndyke Pit; 1994-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Seton Construction Inc. → Thorndyke Pit; 2018-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce B  Seton → Seton Construction Inc.; 2018-04-19 to current/open; source msha-controller-operator-history