# Relationship history for MSHA mine 0405993

Current hierarchy: **Donald D  Chapin Jr → The Don Chapin Company → Marina Landfill**

- 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:** Donald D  Chapin Jr → Marina Landfill; 1998-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** The Don Chapin Company → Marina Landfill; 2026-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald D  Chapin Jr → The Don Chapin Company; 2026-07-01 to current/open; source msha-controller-operator-history