# Relationship history for MSHA mine 1601344

Current hierarchy: **Sean A  Villavaso → MURPHY CONSTRUCTION CO., INC. → PARISH SAND LLC - Lower Coast Algiers Pit**

- 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

- **controller_controls_mine:** Lamont L  Murphy et al → PARISH SAND LLC - Lower Coast Algiers Pi; 1950-01-01 to 2014-02-18; source msha-controller-operator-history
- **operator_operates_mine:** Kass Brothers Inc → PARISH SAND LLC - Lower Coast Algiers Pi; 1999-03-01 to 2012-04-02; source msha-controller-operator-history
- **controller_controls_mine:** Jean Kass  Connick et al → PARISH SAND LLC - Lower Coast Algiers Pi; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jean Kass  Connick et al → Kass Brothers Inc; 1999-03-01 to 2012-04-02; source msha-controller-operator-history
- **controller_controls_operator:** Mamie  Kass et al → Kass Brothers Inc; 1999-03-01 to 2012-04-02; source msha-controller-operator-history
- **operator_operates_mine:** MURPHY CONSTRUCTION CO., INC. → PARISH SAND LLC - Lower Coast Algiers Pi; 2012-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lamont L  Murphy et al → MURPHY CONSTRUCTION CO., INC.; 2012-04-03 to 2014-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Cecile L  Murphy et al → MURPHY CONSTRUCTION CO., INC.; 2012-04-03 to 2014-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Sean A  Villavaso → PARISH SAND LLC - Lower Coast Algiers Pi; 2014-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sean A  Villavaso → MURPHY CONSTRUCTION CO., INC.; 2014-02-19 to current/open; source msha-controller-operator-history