# Relationship history for MSHA mine 4202434

Current hierarchy: **Jeffrey L  Sagers → Southwest Stone, Inc. → Reef Mine**

- 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:** Castle Valley Stone LLC → Reef Mine; 2006-03-10 to 2009-10-11; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey L  Sagers  et al → Reef Mine; 2006-03-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey L  Sagers  et al → Castle Valley Stone LLC; 2006-03-10 to 2009-10-11; source msha-controller-operator-history
- **controller_controls_operator:** Tracy  Burnham  et al → Castle Valley Stone LLC; 2006-03-10 to 2009-10-11; source msha-controller-operator-history
- **operator_operates_mine:** Southwest Stone, Inc. → Reef Mine; 2009-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey L  Sagers → Reef Mine; 2009-10-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey L  Sagers → Southwest Stone, Inc.; 2009-10-12 to current/open; source msha-controller-operator-history