# Relationship history for MSHA mine 1601384

Current hierarchy: **James L  Core; Richard U  Core → Custom Materials Inc → Norris 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:** James L  Core  et al → Norris Pit; 1997-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Custom Materials Inc → Norris Pit; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Core  et al → Custom Materials Inc; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard U  Core  et al → Custom Materials Inc; 2001-06-01 to current/open; source msha-controller-operator-history