# Relationship history for MSHA mine 2302132

Current hierarchy: **Darrell  Dement; Gloria  Dement; Warren  Dement → Black River Asphalt LLC → Black River Asphalt**

- 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:** Black River Asphalt LLC → Black River Asphalt; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Warren  Dement  et al → Black River Asphalt; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Warren  Dement  et al → Black River Asphalt LLC; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Dement  et al → Black River Asphalt LLC; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gloria  Dement  et al → Black River Asphalt LLC; 1995-10-01 to current/open; source msha-controller-operator-history