# Relationship history for MSHA mine 1302287

Current hierarchy: **Rick J  McDowell → McDowell & Sons Lime Company → Screen #1 McDowell & Sons Lime Company**

- 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:** McDowell & Sons Lime Company → Screen #1 McDowell & Sons Lime Company; 2004-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick J  McDowell → Screen #1 McDowell & Sons Lime Company; 2004-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick J  McDowell → McDowell & Sons Lime Company; 2004-06-16 to current/open; source msha-controller-operator-history