# Relationship history for MSHA mine 0201217

Current hierarchy: **Rachelle  Ricedorff; Richard L Adams; DeeWayne  Adams → A & A Materials Inc → 0SCREENING PLANT & SHOP**

- 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

- **operator_operates_mine:** A & A Materials Inc → 0SCREENING PLANT & SHOP; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raymond A  Adams → 0SCREENING PLANT & SHOP; 1950-01-01 to 2013-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Raymond A  Adams → A & A Materials Inc; 1950-01-01 to 2013-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Jack J  Ricedorff et al → 0SCREENING PLANT & SHOP; 2013-05-14 to 2024-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Jack J  Ricedorff et al → A & A Materials Inc; 2013-05-14 to 2024-03-13; source msha-controller-operator-history
- **controller_controls_mine:** DeeWayne  Adams et al → 0SCREENING PLANT & SHOP; 2024-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** DeeWayne  Adams et al → A & A Materials Inc; 2024-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard L Adams et al → A & A Materials Inc; 2024-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rachelle  Ricedorff et al → A & A Materials Inc; 2024-03-14 to current/open; source msha-controller-operator-history