# Relationship history for MSHA mine 3610267

Current hierarchy: **Stephen  Hess; Scott  Hess → DAGGETT SAND & GRAVEL INC → EAGLE 1200-25CC PORTABLE CRUSHER SN31546**

- 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

- **controller_controls_mine:** Scott  Hess et al → EAGLE 1200-25CC PORTABLE CRUSHER SN31546; 1997-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Daggett Sand & Gravel Inc → EAGLE 1200-25CC PORTABLE CRUSHER SN31546; 2018-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Hess et al → Daggett Sand & Gravel Inc; 2018-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Hess et al → Daggett Sand & Gravel Inc; 2018-10-28 to current/open; source msha-controller-operator-history