# Relationship history for MSHA mine 3800762

Current hierarchy: **Jason C  Deck → Ameri-Con Materials Inc. → Dravo Road Mine at Squaw Valley**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Jason C  Deck → Dravo Road Mine at Squaw Valley; 2013-06-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ameri-Con Materials Inc. → Dravo Road Mine at Squaw Valley; 2022-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason C  Deck → Ameri-Con Materials Inc.; 2022-12-16 to current/open; source msha-controller-operator-history