# Relationship history for MSHA mine 4405347

Current hierarchy: **Arlie J  Lambert; Dennis B  Sutherland → Lambert & Arrington → #1 Strip And Auger**

- 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:** Little K Coal Company → #1 Strip And Auger; 1979-12-01 to 1981-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Little Darrel → #1 Strip And Auger; 1979-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Little Darrel → Little K Coal Company; 1979-12-01 to 1981-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Lambert & Arrington → #1 Strip And Auger; 1981-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis B  Sutherland et al → #1 Strip And Auger; 1981-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis B  Sutherland et al → Lambert & Arrington; 1981-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arlie J  Lambert et al → Lambert & Arrington; 1981-06-13 to current/open; source msha-controller-operator-history