# Relationship history for MSHA mine 3003449

Current hierarchy: **Kurt  Harvey → Harvey Materials Corp. → Prospect 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

- **operator_operates_mine:** Harvey Construction → Prospect Pit; 2003-05-13 to 2010-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Gary A  Harvey → Prospect Pit; 2003-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary A  Harvey → Harvey Construction; 2003-05-13 to 2010-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Gary A  Harvey → Prospect Pit; 2006-02-17 to 2021-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Harvey Materials Corp. → Prospect Pit; 2010-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary A  Harvey → Harvey Materials Corp.; 2010-10-19 to 2021-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Harvey → Prospect Pit; 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