# Relationship history for MSHA mine 4104691

Current hierarchy: **David B  Fugler → Wishbone Ranch → Sabine**

- 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:** David B  Fugler → Sabine; 2006-08-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wishbone Ranch → Sabine; 2007-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David B  Fugler → Wishbone Ranch; 2007-09-25 to current/open; source msha-controller-operator-history