# Relationship history for MSHA mine 2002889

Current hierarchy: **Dennis J  Miller → Miller's Sand & Gravel LLC → Miller Pit**

- 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:** Miller'S Sand & Gravel → Miller Pit; 1992-10-01 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Gerald  Miller → Miller Pit; 1992-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald  Miller → Miller'S Sand & Gravel; 1992-10-01 to 1997-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Miller's Sand & Gravel LLC → Miller Pit; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis J  Miller → Miller Pit; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis J  Miller → Miller's Sand & Gravel LLC; 1997-04-01 to current/open; source msha-controller-operator-history