# Relationship history for MSHA mine 0901274

Current hierarchy: **Synergy Materials LLC; Aligned Equity Partners LLC → Walker County Stone, LLC → Walker County Stone**

- 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:** Walker County Stone, LLC → Walker County Stone; 2025-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Synergy Materials LLC et al → Walker County Stone; 2025-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Synergy Materials LLC et al → Walker County Stone, LLC; 2025-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aligned Equity Partners LLC et al → Walker County Stone, LLC; 2025-11-25 to current/open; source msha-controller-operator-history