# Relationship history for MSHA mine 1202340

Current hierarchy: **James R  Livengood → Martinsville Rockmakers Inc → MRI Sand & Gravel**

- 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:** Rockmakers LLC → MRI Sand & Gravel; 2003-02-05 to 2007-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Van  Furgeson et al → MRI Sand & Gravel; 2003-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Van  Furgeson et al → Rockmakers LLC; 2003-02-05 to 2007-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Martinsville Rockmakers Inc → MRI Sand & Gravel; 2007-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James R  Livengood et al → MRI Sand & Gravel; 2007-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James R  Livengood et al → Martinsville Rockmakers Inc; 2007-08-06 to current/open; source msha-controller-operator-history