# Relationship history for MSHA mine 3605226

Current hierarchy: **Metropolitan International Inc → Central & Eastern Coal Company → Central & Eastern 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Central & Eastern Coal Company → Central & Eastern Strip; 1974-08-01 to 1976-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Smith Vincent → Central & Eastern Strip; 1974-08-01 to 1976-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Smith Vincent → Central & Eastern Coal Company; 1974-08-01 to 1976-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Metropolitan International Inc → Central & Eastern Strip; 1976-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Central & Eastern Coal Company → Central & Eastern Strip; 1976-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Metropolitan International Inc → Central & Eastern Coal Company; 1976-11-01 to current/open; source msha-controller-operator-history