# Relationship history for MSHA mine 3003246

Current hierarchy: **Kenneth R  Tracy Jr → Tracy Materials Inc → ARCHDALE 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:** Kenneth R  Tracy Jr → ARCHDALE PIT; 1985-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tracy Materials Inc → ARCHDALE PIT; 1998-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth R  Tracy Jr → Tracy Materials Inc; 1998-10-01 to current/open; source msha-controller-operator-history