# Relationship history for MSHA mine 1202304

Current hierarchy: **Shirley  Underwood → W R Beach Inc → W R Beach Incorporated Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** W R Beach Inc → W R Beach Incorporated Sand & Gravel; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** J Paul  Beach → W R Beach Incorporated Sand & Gravel; 2001-03-01 to 2020-04-29; source msha-controller-operator-history
- **controller_controls_operator:** J Paul  Beach → W R Beach Inc; 2001-03-01 to 2020-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Shirley  Underwood → W R Beach Incorporated Sand & Gravel; 2020-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shirley  Underwood → W R Beach Inc; 2020-04-30 to current/open; source msha-controller-operator-history