# Relationship history for MSHA mine 3002723

Current hierarchy: **Daniel E  Clark; Thomas  Pickering → Rainbow Quarries Inc → Rainbow Quarries**

- 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:** Rainbow Quarries Inc → Rainbow Quarries; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Pickering  et al → Rainbow Quarries; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Pickering  et al → Rainbow Quarries Inc; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel E  Clark  et al → Rainbow Quarries Inc; 1986-04-01 to current/open; source msha-controller-operator-history