# Relationship history for MSHA mine 2902398

Current hierarchy: **Merl  Farnsworth → Farnsworth Development Inc → Price 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:** Farnsworth Development Inc → Price Pit; 2009-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Merl  Farnsworth → Price Pit; 2009-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Merl  Farnsworth → Farnsworth Development Inc; 2009-09-03 to current/open; source msha-controller-operator-history