# Relationship history for MSHA mine 4604748

Current hierarchy: **Sweeney Carl → C & D Coal Company Inc → 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:** Litwar Coal Company → No 1 Mine; 1975-07-14 to 1975-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Lester Jimmy--Keaster Cline--Gary & Luther Bailey → No 1 Mine; 1975-07-14 to 1975-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Lester Jimmy--Keaster Cline--Gary & Luther Bailey → Litwar Coal Company; 1975-07-14 to 1975-12-03; source msha-controller-operator-history
- **operator_operates_mine:** Pat Coal Company → No 1 Mine; 1975-12-04 to 1976-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Lester Jimmy & Jackie → No 1 Mine; 1975-12-04 to 1976-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Lester Jimmy & Jackie → Pat Coal Company; 1975-12-04 to 1976-03-23; source msha-controller-operator-history
- **operator_operates_mine:** C & D Coal Company Inc → No 1 Mine; 1976-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sweeney Carl → No 1 Mine; 1976-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sweeney Carl → C & D Coal Company Inc; 1976-03-24 to current/open; source msha-controller-operator-history