# Relationship history for MSHA mine 4202310

Current hierarchy: **Gordon C  Orton → Gordon C. Orton Const., Inc. → Rocky Point Quarry**

- 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

- **operator_operates_mine:** Gordon C. Orton Const., Inc. → Rocky Point Quarry; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gordon C  Orton et al → Rocky Point Quarry; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gordon C  Orton et al → Gordon C. Orton Const., Inc.; 2000-12-01 to current/open; source msha-controller-operator-history