# Relationship history for MSHA mine 2000667

Current hierarchy: **Mike  Neadow; Kevin  Reis → C L D Sand & Gravel Inc → C.L.D. SAND & GRAVEL, INC.**

- 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:** Andersen Sand & Gravel Company → C.L.D. SAND & GRAVEL, INC.; 1950-01-01 to 1995-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Andersen Frank N → C.L.D. SAND & GRAVEL, INC.; 1950-01-01 to 1995-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Andersen Frank N → Andersen Sand & Gravel Company; 1950-01-01 to 1995-05-31; source msha-controller-operator-history
- **operator_operates_mine:** C L D Sand & Gravel Inc → C.L.D. SAND & GRAVEL, INC.; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Neadow  et al → C.L.D. SAND & GRAVEL, INC.; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Neadow  et al → C L D Sand & Gravel Inc; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Reis  et al → C L D Sand & Gravel Inc; 1995-06-01 to current/open; source msha-controller-operator-history