# Relationship history for MSHA mine 3600681

Current hierarchy: **Thomas Jeanine → Union Clay Company Inc → Union Clay Coal Mine #1**

- 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:** Union Clay Company Inc → Union Clay Coal Mine #1; 1974-10-01 to 1980-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Danvir Richard A → Union Clay Coal Mine #1; 1974-10-01 to 1980-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Danvir Richard A → Union Clay Company Inc; 1974-10-01 to 1980-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Union Clay Company Inc → Union Clay Coal Mine #1; 1980-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas Jeanine → Union Clay Coal Mine #1; 1980-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Jeanine → Union Clay Company Inc; 1980-08-26 to current/open; source msha-controller-operator-history