# Relationship history for MSHA mine 1601360

Current hierarchy: **John  Daley → Daley Sand & Gravel Inc → DALEY 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:** Daley Sand & Gravel Inc → DALEY SAND & GRAVEL INC.; 2000-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Daley  et al → DALEY SAND & GRAVEL INC.; 2000-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Daley  et al → Daley Sand & Gravel Inc; 2000-02-01 to current/open; source msha-controller-operator-history