# Relationship history for MSHA mine 1002156

Current hierarchy: **Jon C  Gregory; Raymon B  Goodwin → East Idaho Gravel → Blackfoot**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** East Idaho Gravel → Blackfoot; 2008-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jon C  Gregory et al → Blackfoot; 2008-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon C  Gregory et al → East Idaho Gravel; 2008-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymon B  Goodwin et al → East Idaho Gravel; 2008-04-28 to current/open; source msha-controller-operator-history