# Relationship history for MSHA mine 3003896

Current hierarchy: **Kurt  Harvey → HARVEY MATERIALS CORP. → QA 441 SER#10075**

- 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:** Gary A  Harvey → QA 441 SER#10075; 2006-02-17 to 2021-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Harvey Materials Corp. → QA 441 SER#10075; 2013-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary A  Harvey → Harvey Materials Corp.; 2013-08-21 to 2021-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Harvey → QA 441 SER#10075; 2021-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Harvey → Harvey Materials Corp.; 2021-03-17 to current/open; source msha-controller-operator-history