# Relationship history for MSHA mine 2700423

Current hierarchy: **Ray  Lemay; Donna M.  Lemay → LEMAY EXCAVATION INC. → HILLSBORO SAND & GRAVEL 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** LEMAY EXCAVATION INC. → HILLSBORO SAND & GRAVEL LLC; 2007-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ray  Lemay et al → HILLSBORO SAND & GRAVEL LLC; 2007-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Lemay et al → LEMAY EXCAVATION INC.; 2007-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna M.  Lemay et al → LEMAY EXCAVATION INC.; 2007-06-01 to current/open; source msha-controller-operator-history