# Relationship history for MSHA mine 2401695

Current hierarchy: **Mc Lean Ron → French Bar Mine Inc → French Bar 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:** Modern Exploration Development & Mining → French Bar Mine; 1982-07-01 to 1986-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Zook Donald & Glen → French Bar Mine; 1982-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zook Donald & Glen → Modern Exploration Development & Mining; 1982-07-01 to 1986-06-11; source msha-controller-operator-history
- **operator_operates_mine:** French Bar Mine Inc → French Bar Mine; 1986-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Lean Ron → French Bar Mine; 1986-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Lean Ron → French Bar Mine Inc; 1986-06-12 to current/open; source msha-controller-operator-history