# Relationship history for MSHA mine 1201595

Current hierarchy: **Raven Robert & James--Paul D Shelton → Raven Brothers Coal → Raven Bros Coal Strip**

- 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:** Raven Brothers Coal → Raven Bros Coal Strip; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raven Robert & James--Paul D Shelton → Raven Bros Coal Strip; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raven Robert & James--Paul D Shelton → Raven Brothers Coal; 1977-07-01 to current/open; source msha-controller-operator-history