# Relationship history for MSHA mine 4801264

Current hierarchy: **Harold  Albright; Lisa  Albright → Albright Sand & Gravel Inc → A J 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Albright Sand & Gravel Inc → A J PIT; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harold  Albright  et al → A J PIT; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Albright  et al → Albright Sand & Gravel Inc; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lisa  Albright  et al → Albright Sand & Gravel Inc; 1979-11-01 to current/open; source msha-controller-operator-history