# Relationship history for MSHA mine 0700102

Current hierarchy: **David G.  Horsey → David G Horsey & Sons Trucking Inc → DAVID G. HORSEY & SONS TRUCKING**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** David G Horsey & Sons Trucking Inc → DAVID G. HORSEY & SONS TRUCKING; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David G.  Horsey et al → DAVID G. HORSEY & SONS TRUCKING; 1990-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David G.  Horsey et al → David G Horsey & Sons Trucking Inc; 1990-03-01 to current/open; source msha-controller-operator-history