# Relationship history for MSHA mine 2901913

Current hierarchy: **Herman  Tabet → J H T Construction Company → ORONA 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:** J H T Construction Company → ORONA PIT; 1983-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Herman  Tabet → ORONA PIT; 1983-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Herman  Tabet → J H T Construction Company; 1983-04-01 to current/open; source msha-controller-operator-history