# Relationship history for MSHA mine 1519697

Current hierarchy: **Jerry Thomas  Markham; David  Daniel → Overland Conveying Systems LLC → Kronos Overland Conveyor**

- 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:** Overland Conveying Systems LLC → Kronos Overland Conveyor; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry Thomas  Markham et al → Kronos Overland Conveyor; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry Thomas  Markham et al → Overland Conveying Systems LLC; 2013-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Daniel et al → Overland Conveying Systems LLC; 2013-07-01 to current/open; source msha-controller-operator-history