# Relationship history for MSHA mine 1518098

Current hierarchy: **Benjamin R.  Bennett → Cloverfork Mining & Excavating Inc → Mine No 20**

- 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:** Benjamin R.  Bennett → Mine No 20; 1981-11-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cloverfork Mining & Excavating Inc → Mine No 20; 1998-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin R.  Bennett → Cloverfork Mining & Excavating Inc; 1998-09-01 to current/open; source msha-controller-operator-history