# Relationship history for MSHA mine 0100052

Current hierarchy: **William W Wade; Robin A Wade III → WADE SAND & GRAVEL CO., INC → WADE SAND & GRAVEL CO., INC.**

- 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:** Wade Sand & Gravel Co., Inc → WADE SAND & GRAVEL CO., INC.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robin A  Wade Jr → WADE SAND & GRAVEL CO., INC.; 1950-01-01 to 2017-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Robin A  Wade Jr → Wade Sand & Gravel Co., Inc; 1950-01-01 to 2017-11-08; source msha-controller-operator-history
- **controller_controls_mine:** William W Wade et al → WADE SAND & GRAVEL CO., INC.; 2017-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William W Wade et al → Wade Sand & Gravel Co., Inc; 2017-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robin A Wade III et al → Wade Sand & Gravel Co., Inc; 2017-11-09 to current/open; source msha-controller-operator-history