# Relationship history for MSHA mine 0505131

Current hierarchy: **Tyler  Chamberlain; Mason  Chamberlain → Chamberlain's, LLC → PVRE Pit #1**

- 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

- **operator_operates_mine:** Chamberlain's, LLC → PVRE Pit #1; 2020-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mason  Chamberlain Et Al → PVRE Pit #1; 2020-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mason  Chamberlain Et Al → Chamberlain's, LLC; 2020-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tyler  Chamberlain Et Al → Chamberlain's, LLC; 2020-11-15 to current/open; source msha-controller-operator-history