# Relationship history for MSHA mine 0102932

Current hierarchy: **Arwood Mylinda → Arwood Demolition & Salvage Company → Linton Job**

- 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:** Arwood Demolition & Salvage Company → Linton Job; 1991-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arwood Mylinda → Linton Job; 1991-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arwood Mylinda → Arwood Demolition & Salvage Company; 1991-11-01 to current/open; source msha-controller-operator-history