# Relationship history for MSHA mine 5001167

Current hierarchy: **Joe  Tougas; Cole  Petersen → Metco Alaska, LLC → Metco River Bar & Plant**

- 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

- **operator_operates_mine:** Metco Inc → Metco River Bar & Plant; 1950-01-01 to 2019-06-02; source msha-controller-operator-history
- **controller_controls_mine:** David  Dieckgraeff → Metco River Bar & Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Dieckgraeff → Metco Inc; 1950-01-01 to 2019-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Metco Alaska, LLC → Metco River Bar & Plant; 2019-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Tougas et al → Metco River Bar & Plant; 2019-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Tougas et al → Metco Alaska, LLC; 2019-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cole  Petersen et al → Metco Alaska, LLC; 2019-06-03 to current/open; source msha-controller-operator-history