# Relationship history for MSHA mine 0600827

Current hierarchy: **Linda  Adelman → ADELMAN SAND & GRAVEL → CAROLINE 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:** Linda  Adelman → CAROLINE RD PIT; 1999-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** ADELMAN SAND & GRAVEL → CAROLINE RD PIT; 2022-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Linda  Adelman → ADELMAN SAND & GRAVEL; 2022-02-07 to current/open; source msha-controller-operator-history