# Relationship history for MSHA mine 1601186

Current hierarchy: **Arthur J  Geary → Pearl Aggregate Materials → HONEY ISLAND SAND PLANT**

- 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:** Pearl Sands Inc → HONEY ISLAND SAND PLANT; 1989-07-01 to 1996-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Ronald W Fisk et al → HONEY ISLAND SAND PLANT; 1989-07-01 to 1996-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W Fisk et al → Pearl Sands Inc; 1989-07-01 to 1996-02-23; source msha-controller-operator-history
- **controller_controls_mine:** George  Douglass Jr → HONEY ISLAND SAND PLANT; 1992-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pontchartrain Materials Corp → HONEY ISLAND SAND PLANT; 1996-02-24 to 2008-12-11; source msha-controller-operator-history
- **controller_controls_operator:** George  Douglass Jr → Pontchartrain Materials Corp; 1996-02-24 to 2008-12-11; source msha-controller-operator-history
- **operator_operates_mine:** Pearl Aggregate Materials → HONEY ISLAND SAND PLANT; 2008-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arthur J  Geary → HONEY ISLAND SAND PLANT; 2008-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur J  Geary → Pearl Aggregate Materials; 2008-12-12 to current/open; source msha-controller-operator-history