# Relationship history for MSHA mine 1513802

Current hierarchy: **James D  Napier → W M N Coal 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

- **operator_operates_mine:** Wade Ridge Mining Inc → #1 Surface; 1982-10-01 to 1983-10-04; source msha-controller-operator-history
- **controller_controls_mine:** Mays Neil → #1 Surface; 1982-10-01 to 1988-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Mays Neil → Wade Ridge Mining Inc; 1982-10-01 to 1983-10-04; source msha-controller-operator-history
- **operator_operates_mine:** W M N Coal Inc → #1 Surface; 1983-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James D  Napier → #1 Surface; 1983-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James D  Napier → W M N Coal Inc; 1983-10-05 to current/open; source msha-controller-operator-history