# Relationship history for MSHA mine 1601340

Current hierarchy: **Lonnie  Bickham → Lon-Land Gravel Company → Plant No 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:** Lon-Land Gravel Company → Plant No 1; 1998-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lonnie  Bickham → Plant No 1; 1998-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lonnie  Bickham → Lon-Land Gravel Company; 1998-11-01 to current/open; source msha-controller-operator-history