# Relationship history for MSHA mine 1515616

Current hierarchy: **Turner Fran E → Ron Cat Mining Inc → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Runyon Louis Et Al → Mine #1; 1978-10-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & B Coal Company Inc → Mine #1; 1986-05-01 to 1988-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Runyon Louis Et Al → C & B Coal Company Inc; 1986-05-01 to 1988-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Turner Fran E Et Al → Mine #1; 1988-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ron Cat Mining Inc → Mine #1; 1988-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Turner Fran E Et Al → Ron Cat Mining Inc; 1988-08-02 to current/open; source msha-controller-operator-history