# Relationship history for MSHA mine 4002364

Current hierarchy: **Nunley Donald → D & B Mining Inc → Donald Nunley**

- 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:** Jessie Shipley Coal Company → Donald Nunley; 1977-12-01 to 1985-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Shipley Jessie → Donald Nunley; 1977-12-01 to 1988-12-19; source msha-controller-operator-history
- **controller_controls_operator:** Shipley Jessie → Jessie Shipley Coal Company; 1977-12-01 to 1985-03-28; source msha-controller-operator-history
- **operator_operates_mine:** D & B Mining Inc → Donald Nunley; 1985-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nunley Donald → Donald Nunley; 1985-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nunley Donald → D & B Mining Inc; 1985-03-29 to current/open; source msha-controller-operator-history