# Relationship history for MSHA mine 3003982

Current hierarchy: **Chris  Acker → High Peaks Sand and Gravel, LLC → High Peaks Sand and Gravel, LLC**

- 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

- **operator_operates_mine:** Mountain Forest Products Inc → High Peaks Sand and Gravel, LLC; 2016-11-15 to 2019-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Kevin C Mero → High Peaks Sand and Gravel, LLC; 2016-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin C Mero → Mountain Forest Products Inc; 2016-11-15 to 2019-09-29; source msha-controller-operator-history
- **operator_operates_mine:** High Peaks Sand and Gravel, LLC → High Peaks Sand and Gravel, LLC; 2019-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Acker → High Peaks Sand and Gravel, LLC; 2019-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Acker → High Peaks Sand and Gravel, LLC; 2019-09-30 to current/open; source msha-controller-operator-history