# Relationship history for MSHA mine 4103500

Current hierarchy: **June  Grant → Grant Construction Company → GRANT 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:** Tommy  Grant → GRANT PIT; 1983-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Grant Construction Company → GRANT PIT; 1987-11-01 to 2011-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Tommy  Grant → Grant Construction Company; 1987-11-01 to 2011-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Grant Construction Company → GRANT PIT; 2011-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** June  Grant et al → GRANT PIT; 2011-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** June  Grant et al → Grant Construction Company; 2011-11-04 to current/open; source msha-controller-operator-history