# Relationship history for MSHA mine 2200599

Current hierarchy: **Ray  Delancy; Vicki  Delancy → Delancey Sand & Gravel → Delancey Pit**

- 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:** Delancey Sand & Gravel → Delancey Pit; 1987-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vicki  Delancy et al → Delancey Pit; 1987-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vicki  Delancy et al → Delancey Sand & Gravel; 1987-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Delancy et al → Delancey Sand & Gravel; 1987-02-01 to current/open; source msha-controller-operator-history