# Relationship history for MSHA mine 4703146

Current hierarchy: **Paul T  Ayres → American Materials Corp → #5700 Svedala Plant**

- 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

- **controller_controls_mine:** Paul T  Ayres → #5700 Svedala Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Koss Granite → #5700 Svedala Plant; 1998-05-01 to 2000-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Jack L  Koss → #5700 Svedala Plant; 1998-05-01 to 2000-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Jack L  Koss → Koss Granite; 1998-05-01 to 2000-01-06; source msha-controller-operator-history
- **operator_operates_mine:** Red Rock Granite Llc → #5700 Svedala Plant; 2000-01-07 to 2002-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul T  Ayres → #5700 Svedala Plant; 2000-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul T  Ayres → Red Rock Granite Llc; 2000-01-07 to 2002-03-31; source msha-controller-operator-history
- **operator_operates_mine:** American Materials Corp → #5700 Svedala Plant; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul T  Ayres → American Materials Corp; 2002-04-01 to current/open; source msha-controller-operator-history