# Relationship history for MSHA mine 1601501

Current hierarchy: **Sean A  Villavaso → Murphy Dredging Co., Inc. → St. Anthony**

- 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:** Murphy Dredging Co., Inc. → St. Anthony; 2010-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lamont L  Murphy → St. Anthony; 2010-01-29 to 2014-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Lamont L  Murphy → Murphy Dredging Co., Inc.; 2010-01-29 to 2014-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Sean A  Villavaso → St. Anthony; 2014-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sean A  Villavaso → Murphy Dredging Co., Inc.; 2014-02-19 to current/open; source msha-controller-operator-history