# Relationship history for MSHA mine 2200720

Current hierarchy: **Ray  Delancy; Vicki  Delancy → R V A Sand & Gravel → R.V.A. 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** R V A Sand & Gravel → R.V.A. PIT #1; 1999-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vicki  Delancy et al → R.V.A. PIT #1; 1999-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vicki  Delancy et al → R V A Sand & Gravel; 1999-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Delancy et al → R V A Sand & Gravel; 1999-12-01 to current/open; source msha-controller-operator-history