# Relationship history for MSHA mine 4104279

Current hierarchy: **Richard S  Hughes → RSH Trucking → ALMEDA SCHOOL RD. 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Richard S  Hughes → ALMEDA SCHOOL RD. PIT; 1990-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rsh Trucking → ALMEDA SCHOOL RD. PIT; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard S  Hughes → Rsh Trucking; 2001-04-01 to current/open; source msha-controller-operator-history