# Relationship history for MSHA mine 1401575

Current hierarchy: **Larry L  Bender → Bender Sand & Dirt → Bender Sand & Dirt**

- 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:** Bender Sand & Dirt → Bender Sand & Dirt; 1993-09-01 to 2018-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Bender Marvin → Bender Sand & Dirt; 1993-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bender Marvin → Bender Sand & Dirt; 1993-09-01 to 2018-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Bender Sand & Dirt → Bender Sand & Dirt; 2018-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry L  Bender → Bender Sand & Dirt; 2018-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry L  Bender → Bender Sand & Dirt; 2018-08-10 to current/open; source msha-controller-operator-history