# Relationship history for MSHA mine 3605384

Current hierarchy: **Donton Ronald → D & D Coal Company → No 2 Slope**

- 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:** C F & D Coal Company → No 2 Slope; 1974-12-18 to 1975-06-03; source msha-controller-operator-history
- **controller_controls_mine:** C F & D Coal Company → No 2 Slope; 1974-12-18 to 1975-06-03; source msha-controller-operator-history
- **controller_controls_operator:** C F & D Coal Company → C F & D Coal Company; 1974-12-18 to 1975-06-03; source msha-controller-operator-history
- **operator_operates_mine:** F & W Coal Company → No 2 Slope; 1975-06-04 to 1980-11-03; source msha-controller-operator-history
- **controller_controls_mine:** Natale Frank M → No 2 Slope; 1975-06-04 to 1980-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Natale Frank M → F & W Coal Company; 1975-06-04 to 1980-11-03; source msha-controller-operator-history
- **operator_operates_mine:** D & D Coal Company → No 2 Slope; 1980-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donton Ronald Et Al → No 2 Slope; 1980-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donton Ronald Et Al → D & D Coal Company; 1980-11-04 to current/open; source msha-controller-operator-history