# Relationship history for MSHA mine 1601214

Current hierarchy: **Jernigan Cathy → Jernigan Sand & Gravel → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Richard D Beard → Pit #1; 1990-10-01 to 1991-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Beard Richard D → Pit #1; 1990-10-01 to 1991-08-06; source msha-controller-operator-history
- **controller_controls_operator:** Beard Richard D → Richard D Beard; 1990-10-01 to 1991-08-06; source msha-controller-operator-history
- **operator_operates_mine:** Jernigan Sand & Gravel → Pit #1; 1991-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jernigan Cathy → Pit #1; 1991-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jernigan Cathy → Jernigan Sand & Gravel; 1991-08-07 to current/open; source msha-controller-operator-history