# Relationship history for MSHA mine 4003628

Current hierarchy: **Edilzar Roldan  Velasquez → South Pittsburg Mountain Stone → South Pittsburg Mountain 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** South Pittsburg Mountain Stone → South Pittsburg Mountain Stone; 2024-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edilzar Roldan  Velasquez → South Pittsburg Mountain Stone; 2024-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edilzar Roldan  Velasquez → South Pittsburg Mountain Stone; 2024-09-19 to current/open; source msha-controller-operator-history