# Relationship history for MSHA mine 1001935

Current hierarchy: **Gerald  Gladish → Silver Valley Rock Products → Silver Valley Rock Products**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Silver Valley Rock Products → Silver Valley Rock Products; 1998-01-01 to 2012-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Long et al → Silver Valley Rock Products; 1998-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Long et al → Silver Valley Rock Products; 1998-01-01 to 2012-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Kim  Taylor et al → Silver Valley Rock Products; 1998-01-01 to 2012-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Silver Valley Rock Products → Silver Valley Rock Products; 2012-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gerald  Gladish → Silver Valley Rock Products; 2012-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald  Gladish → Silver Valley Rock Products; 2012-05-04 to current/open; source msha-controller-operator-history