# Relationship history for MSHA mine 3001864

Current hierarchy: **Robert  Scheinman → 209 Materials LLC → 209 Materials LLC**

- 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:** Kelly Sand & Gravel → 209 Materials LLC; 1950-01-01 to 1996-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Benjamin  Kelly → 209 Materials LLC; 1950-01-01 to 1996-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin  Kelly → Kelly Sand & Gravel; 1950-01-01 to 1996-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Napanoch Sand & Gravel Llc → 209 Materials LLC; 1996-04-18 to 2002-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Gregory  Vurckio et al → 209 Materials LLC; 1996-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory  Vurckio et al → Napanoch Sand & Gravel Llc; 1996-04-18 to 2002-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Janice  Vurckio et al → Napanoch Sand & Gravel Llc; 1996-04-18 to 2002-12-03; source msha-controller-operator-history
- **operator_operates_mine:** 209 Sand & Gravel → 209 Materials LLC; 2002-12-04 to 2010-03-07; source msha-controller-operator-history
- **controller_controls_mine:** Gregory  Leib → 209 Materials LLC; 2002-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory  Leib → 209 Sand & Gravel; 2002-12-04 to 2010-03-07; source msha-controller-operator-history
- **operator_operates_mine:** 209 Materials LLC → 209 Materials LLC; 2010-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Scheinman → 209 Materials LLC; 2010-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Scheinman → 209 Materials LLC; 2010-03-08 to current/open; source msha-controller-operator-history