# Relationship history for MSHA mine 0201956

Current hierarchy: **William  Pattullo; Sheri  Pattullo → Sun Land Sand & Gravel Llc → Sun Land Sand & Gravel Llc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Sun Land Sand & Gravel Llc → Sun Land Sand & Gravel Llc; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Pattullo et al → Sun Land Sand & Gravel Llc; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Pattullo et al → Sun Land Sand & Gravel Llc; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sheri  Pattullo et al → Sun Land Sand & Gravel Llc; 1979-11-01 to current/open; source msha-controller-operator-history