# Relationship history for MSHA mine 3608539

Current hierarchy: **Access Capital Corp → Piney Creek Limited Partnership → Piney Creek 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Tampella Services Inc → Piney Creek Project; 1996-01-01 to 1997-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Midatlantic Energy Of Pa & Pennpower Inc → Piney Creek Project; 1996-01-01 to 1997-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Midatlantic Energy Of Pa & Pennpower Inc → Tampella Services Inc; 1996-01-01 to 1997-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Piney Creek Limited Partnership → Piney Creek Project; 1997-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Access Capital Corp → Piney Creek Project; 1997-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Access Capital Corp → Piney Creek Limited Partnership; 1997-07-30 to current/open; source msha-controller-operator-history