# Relationship history for MSHA mine 3503306

Current hierarchy: **Steven L  Gritten → Clover Patch Bentonite LLC → Clover Patch (Bentonite LLC)**

- 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:** Clover Patch Inc → Clover Patch (Bentonite LLC); 1988-03-01 to 2010-11-03; source msha-controller-operator-history
- **controller_controls_mine:** Leon E  Gritten → Clover Patch (Bentonite LLC); 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leon E  Gritten → Clover Patch Inc; 1988-03-01 to 2010-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Clover Patch Bentonite LLC → Clover Patch (Bentonite LLC); 2010-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven L  Gritten → Clover Patch (Bentonite LLC); 2010-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven L  Gritten → Clover Patch Bentonite LLC; 2010-11-04 to current/open; source msha-controller-operator-history