# Relationship history for MSHA mine 4404823

Current hierarchy: **Smith Paul → Smith Coal Corp → No 1**

- 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:** Hackney Buford & Herman T Wells → No 1; 1975-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beth Ann Coal Corp → No 1; 1977-06-01 to 1979-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Hackney Buford & Herman T Wells → Beth Ann Coal Corp; 1977-06-01 to 1979-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Smith Coal Corp → No 1; 1979-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Paul → No 1; 1979-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Paul → Smith Coal Corp; 1979-05-08 to current/open; source msha-controller-operator-history