# Relationship history for MSHA mine 0504921

Current hierarchy: **James A  Bender → Deadwood Gulch Mining Co → Incas Mine**

- 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:** Deadwood Gulch Mining Co → Incas Mine; 2008-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A  Bender → Incas Mine; 2008-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Bender → Deadwood Gulch Mining Co; 2008-10-07 to current/open; source msha-controller-operator-history