# Relationship history for MSHA mine 0101704

Current hierarchy: **Wall Frank B Jr → Jon Tom Corp → C And D Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Jon Tom Corp → C And D Strip; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wall Frank B Jr → C And D Strip; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wall Frank B Jr → Jon Tom Corp; 1977-05-01 to current/open; source msha-controller-operator-history