# Relationship history for MSHA mine 3609160

Current hierarchy: **Timothy C  Albanese → PDG Land Development, Inc. → Pittsburgh Project**

- 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:** PDG Land Development, Inc. → Pittsburgh Project; 2003-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Timothy C  Albanese → Pittsburgh Project; 2003-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy C  Albanese → PDG Land Development, Inc.; 2003-07-09 to current/open; source msha-controller-operator-history