# Relationship history for MSHA mine 1513351

Current hierarchy: **Graham John W → Enrik Enterprises Inc → #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

- **controller_controls_mine:** Meade James & Edward Slone → #1 Surface; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coalwar Energy Inc → #1 Surface; 1982-02-01 to 1982-09-12; source msha-controller-operator-history
- **controller_controls_operator:** Meade James & Edward Slone → Coalwar Energy Inc; 1982-02-01 to 1982-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Enrik Enterprises Inc → #1 Surface; 1982-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Graham John W → #1 Surface; 1982-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Graham John W → Enrik Enterprises Inc; 1982-09-13 to current/open; source msha-controller-operator-history