# Relationship history for MSHA mine 3608439

Current hierarchy: **Marvin D  Phillips Jr → Anita Mining Company → Sandy Lands**

- 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

- **controller_controls_mine:** Stanford Energy → Sandy Lands; 1983-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Doverspike Brothers Coal Company → Sandy Lands; 1993-11-01 to 1999-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Stanford Energy → Doverspike Brothers Coal Company; 1993-11-01 to 1999-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Anita Mining Company → Sandy Lands; 1999-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marvin D  Phillips Jr → Sandy Lands; 1999-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin D  Phillips Jr → Anita Mining Company; 1999-04-05 to current/open; source msha-controller-operator-history