# Relationship history for MSHA mine 4604170

Current hierarchy: **Cline Ted-Ed & Mark → Triple C Coal Company → No 1 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:** B B & S Coal Company → No 1 Mine; 1974-01-01 to 1974-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Browning Troy → No 1 Mine; 1974-01-01 to 1974-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Browning Troy → B B & S Coal Company; 1974-01-01 to 1974-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Triple C Coal Company → No 1 Mine; 1974-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cline Ted-Ed & Mark Et Al → No 1 Mine; 1974-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cline Ted-Ed & Mark Et Al → Triple C Coal Company; 1974-08-20 to current/open; source msha-controller-operator-history