# Relationship history for MSHA mine 1509673

Current hierarchy: **Barry  Runyon; Brian A  Runyon → Energy Products Inc → No 1 Surface**

- 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:** D C Wells & Larry Wells Coal Company Inc → No 1 Surface; 1976-04-30 to 1976-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Wells D C → No 1 Surface; 1976-04-30 to 1976-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Wells D C → D C Wells & Larry Wells Coal Company Inc; 1976-04-30 to 1976-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Energy Products Inc → No 1 Surface; 1976-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian A  Runyon et al → No 1 Surface; 1976-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian A  Runyon et al → Energy Products Inc; 1976-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barry  Runyon et al → Energy Products Inc; 1976-08-15 to current/open; source msha-controller-operator-history