# Relationship history for MSHA mine 4606026

Current hierarchy: **Claypool Ernest R → B & E Contracting Company Inc → B & E #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:** Coalex Inc → B & E #1 Strip; 1979-07-01 to 1980-12-16; source msha-controller-operator-history
- **controller_controls_mine:** Patrick H  Cunningham et al → B & E #1 Strip; 1979-07-01 to 1980-12-16; source msha-controller-operator-history
- **controller_controls_operator:** Patrick H  Cunningham et al → Coalex Inc; 1979-07-01 to 1980-12-16; source msha-controller-operator-history
- **operator_operates_mine:** B & E Contracting Company Inc → B & E #1 Strip; 1980-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Claypool Ernest R → B & E #1 Strip; 1980-12-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Claypool Ernest R → B & E Contracting Company Inc; 1980-12-17 to current/open; source msha-controller-operator-history