# Relationship history for MSHA mine 1700513

Current hierarchy: **Town Of Frenchville-ME → Town Of Frenchville → Portable Plant - Town fo Frenchville**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Town Of Frenchville → Portable Plant - Town fo Frenchville; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Frenchville-ME → Portable Plant - Town fo Frenchville; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Frenchville-ME → Town Of Frenchville; 1980-05-01 to current/open; source msha-controller-operator-history