# Relationship history for MSHA mine 2800984

Current hierarchy: **Janet  Ay → Earthwork Associates Inc → GANDY'S 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

- **controller_controls_mine:** Janet  Ay → GANDY'S PIT; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Earthwork Associates Inc → GANDY'S PIT; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janet  Ay → Earthwork Associates Inc; 1988-08-01 to current/open; source msha-controller-operator-history