# Relationship history for MSHA mine 0600806

Current hierarchy: **Linda  Adelman → Adelman Sand & Gravel, Inc → Chicken Hill**

- 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 → Chicken Hill; 1999-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A.E.N Asphalt Inc → Chicken Hill; 2017-08-22 to 2023-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Linda  Adelman et al → Chicken Hill; 2017-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Linda  Adelman et al → A.E.N Asphalt Inc; 2017-08-22 to 2023-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Adelman Sand & Gravel, Inc → Chicken Hill; 2023-03-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Linda  Adelman → Adelman Sand & Gravel, Inc; 2023-03-26 to current/open; source msha-controller-operator-history