# Relationship history for MSHA mine 3002908

Current hierarchy: **Jefferson County-NY → Jefferson County Highway Department → Inglehart 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:** Jefferson County Highway Department → Inglehart Pit; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jefferson County-NY → Inglehart Pit; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jefferson County-NY → Jefferson County Highway Department; 1989-08-01 to current/open; source msha-controller-operator-history