# Relationship history for MSHA mine 1201710

Current hierarchy: **Shand Alexander (Holdings) Ltd → B & Ls Contracting Inc → Apraw Mine**

- 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

- **controller_controls_mine:** Sargent Bud L → Apraw Mine; 1975-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & L S Contracting Company → Apraw Mine; 1979-05-01 to 1982-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Sargent Bud L → B & L S Contracting Company; 1979-05-01 to 1982-12-31; source msha-controller-operator-history
- **operator_operates_mine:** B & Ls Contracting Inc → Apraw Mine; 1983-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shand Alexander (Holdings) Ltd → Apraw Mine; 1983-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shand Alexander (Holdings) Ltd → B & Ls Contracting Inc; 1983-01-01 to current/open; source msha-controller-operator-history