# Relationship history for MSHA mine 3606214

Current hierarchy: **Romani Francis J → Interstate Fuels Company Inc → Richland #1 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:** Interstate Fuels Company Inc → Richland #1 Strip; 1976-08-01 to 1979-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Romani Francis J → Richland #1 Strip; 1976-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Romani Francis J → Interstate Fuels Company Inc; 1976-08-01 to 1979-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Rutledge Ronald → Richland #1 Strip; 1978-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ron Rutledge Contracting → Richland #1 Strip; 1979-01-03 to 1979-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Rutledge Ronald → Ron Rutledge Contracting; 1979-01-03 to 1979-05-13; source msha-controller-operator-history
- **operator_operates_mine:** Interstate Fuels Company Inc → Richland #1 Strip; 1979-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Romani Francis J → Interstate Fuels Company Inc; 1979-05-14 to current/open; source msha-controller-operator-history