# Relationship history for MSHA mine 5001710

Current hierarchy: **Charles D Silvey Jr Trust; Mary W  Silvey → Fairbanks Sand & Gravel Inc → Moose Creek Pit**

- 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:** Fairbanks Sand & Gravel Inc → Moose Creek Pit; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mary W  Silvey  et al → Moose Creek Pit; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mary W  Silvey  et al → Fairbanks Sand & Gravel Inc; 2001-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles D Silvey Jr Trust  et al → Fairbanks Sand & Gravel Inc; 2001-08-01 to current/open; source msha-controller-operator-history