# Relationship history for MSHA mine 2602100

Current hierarchy: **Krauss Jeffrey → Art Group Inc → White Grow Gypsum**

- 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:** White Grow Gypsum → White Grow Gypsum; 1989-06-01 to 1991-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Broady George K → White Grow Gypsum; 1989-06-01 to 1991-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Broady George K → White Grow Gypsum; 1989-06-01 to 1991-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Art Group Inc → White Grow Gypsum; 1991-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Krauss Jeffrey → White Grow Gypsum; 1991-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Krauss Jeffrey → Art Group Inc; 1991-03-18 to current/open; source msha-controller-operator-history