# Relationship history for MSHA mine 4604084

Current hierarchy: **Francis Garland → Skin Creek Coal Company → Sand Run Mine**

- 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:** Francis Garland → Sand Run Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Skin Creek Coal Company → Sand Run Mine; 1973-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Francis Garland → Skin Creek Coal Company; 1973-09-01 to current/open; source msha-controller-operator-history