# Relationship history for MSHA mine 4403660

Current hierarchy: **Shelton Donald Lee → Lisa Lee Coal Company → No 1 Mine**

- 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:** Messick Branch Coal Company Inc → No 1 Mine; 1974-01-01 to 1974-11-20; source msha-controller-operator-history
- **controller_controls_mine:** Brown Alfred → No 1 Mine; 1974-01-01 to 1977-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Brown Alfred → Messick Branch Coal Company Inc; 1974-01-01 to 1974-11-20; source msha-controller-operator-history
- **operator_operates_mine:** D & V Coal Company → No 1 Mine; 1974-11-21 to 1979-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Van Dyke Burton & Hassell Davis → No 1 Mine; 1974-11-21 to 1981-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Van Dyke Burton & Hassell Davis → D & V Coal Company; 1974-11-21 to 1979-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Lisa Lee Coal Company → No 1 Mine; 1979-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shelton Donald Lee → No 1 Mine; 1979-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shelton Donald Lee → Lisa Lee Coal Company; 1979-08-13 to current/open; source msha-controller-operator-history