# Relationship history for MSHA mine 4202137

Current hierarchy: **Jeffrey L  Sagers → Castle Valley Stone, LLC → Browns Canyon Quarry**

- 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:** Rock Products Of Utah Inc → Browns Canyon Quarry; 1996-06-01 to 2011-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Develon  Wurth → Browns Canyon Quarry; 1996-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Develon  Wurth → Rock Products Of Utah Inc; 1996-06-01 to 2011-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Castle Valley Stone, LLC → Browns Canyon Quarry; 2011-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey L  Sagers → Browns Canyon Quarry; 2011-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey L  Sagers → Castle Valley Stone, LLC; 2011-02-01 to current/open; source msha-controller-operator-history