# Relationship history for MSHA mine 1001353

Current hierarchy: **Grant Jay → Grant Construction Company → Kt-110-S**

- 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

- **controller_controls_mine:** Grant Jay → Kt-110-S; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Grant Construction Company → Kt-110-S; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grant Jay → Grant Construction Company; 1978-03-09 to current/open; source msha-controller-operator-history