# Relationship history for MSHA mine 4003107

Current hierarchy: **John M  Lambert Jr → Greene County Materials Llc → AFTON ROCK 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Greene County Materials Llc → AFTON ROCK QUARRY; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John M  Lambert Jr  et al → AFTON ROCK QUARRY; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John M  Lambert Jr  et al → Greene County Materials Llc; 1997-03-01 to current/open; source msha-controller-operator-history