# Relationship history for MSHA mine 0901202

Current hierarchy: **Tammy  Parham; Mark  Parham → Deep Woods Quarry llc → Deep Woods Quarry 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Deep Woods Quarry llc → Deep Woods Quarry llc; 2010-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tammy  Parham et al → Deep Woods Quarry llc; 2010-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tammy  Parham et al → Deep Woods Quarry llc; 2010-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Parham et al → Deep Woods Quarry llc; 2010-05-21 to current/open; source msha-controller-operator-history