# Relationship history for MSHA mine 1002381

Current hierarchy: **Chad  Showalter; Brion  Showalter; Caleb  Showalter → Showalter Construction Company → SCC Crusher #1**

- 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:** Showalter Construction Company → SCC Crusher #1; 2025-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Caleb  Showalter et al → SCC Crusher #1; 2025-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Caleb  Showalter et al → Showalter Construction Company; 2025-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chad  Showalter et al → Showalter Construction Company; 2025-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brion  Showalter et al → Showalter Construction Company; 2025-06-30 to current/open; source msha-controller-operator-history