# Relationship history for MSHA mine 3609791

Current hierarchy: **Zane G  Salsman → Zane G. Salsman → Lacey Street 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Martin Quarries → Lacey Street Quarry; 2009-09-15 to 2010-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Robert W.  Martin → Lacey Street Quarry; 2009-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert W.  Martin → Martin Quarries; 2009-09-15 to 2010-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Ranwood, Inc. → Lacey Street Quarry; 2010-03-25 to 2014-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Cole → Lacey Street Quarry; 2010-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Cole → Ranwood, Inc.; 2010-03-25 to 2014-07-01; source msha-controller-operator-history
- **operator_operates_mine:** Zane G. Salsman → Lacey Street Quarry; 2014-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zane G  Salsman → Lacey Street Quarry; 2014-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zane G  Salsman → Zane G. Salsman; 2014-07-02 to current/open; source msha-controller-operator-history