# Relationship history for MSHA mine 3602628

Current hierarchy: **Raymond  Kaplon; Donald  Kaskan → D L R Coal Company → Bear Run No 2**

- 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:** Emanuel Coal Company Inc → Bear Run No 2; 1950-01-01 to 1983-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Johnstown Coal & Coke Company → Bear Run No 2; 1950-01-01 to 1983-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Johnstown Coal & Coke Company → Emanuel Coal Company Inc; 1950-01-01 to 1983-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Kerry L  Mears → Bear Run No 2; 1980-01-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mears Enterprises Inc → Bear Run No 2; 1983-02-04 to 1991-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Kerry L  Mears → Mears Enterprises Inc; 1983-02-04 to 1991-12-31; source msha-controller-operator-history
- **operator_operates_mine:** D L R Coal Company → Bear Run No 2; 1992-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Kaplon et al → Bear Run No 2; 1992-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Kaplon et al → D L R Coal Company; 1992-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Kaskan et al → D L R Coal Company; 1992-01-01 to current/open; source msha-controller-operator-history