# Relationship history for MSHA mine 3604685

Current hierarchy: **Stabler Companies Inc → State Aggregates Inc → Towanda Plant #2 (812)**

- 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:** State Aggregates Inc → Towanda Plant #2 (812); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stabler Companies Inc → Towanda Plant #2 (812); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stabler Companies Inc → State Aggregates Inc; 1950-01-01 to current/open; source msha-controller-operator-history