# Relationship history for MSHA mine 1518698

Current hierarchy: **D Kent  Glover → North American Auger Mining Inc → N.A.A.M. No 10**

- 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

- **controller_controls_mine:** David C  Gummere → N.A.A.M. No 10; 2003-10-10 to 2006-07-19; source msha-controller-operator-history
- **operator_operates_mine:** North American Auger Mining Inc → N.A.A.M. No 10; 2003-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C  Gummere → North American Auger Mining Inc; 2003-12-17 to 2006-07-19; source msha-controller-operator-history
- **controller_controls_mine:** D Kent  Glover → N.A.A.M. No 10; 2006-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** D Kent  Glover → North American Auger Mining Inc; 2006-07-20 to current/open; source msha-controller-operator-history