# Relationship history for MSHA mine 3606862

Current hierarchy: **Calypso Energy Holdings LLC → Northampton Fuel Supply Company Inc → Highland No 5**

- 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

- **controller_controls_mine:** Pagnotti Enterprises Inc → Highland No 5; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jeddo-Highland Coal Company → Highland No 5; 1979-07-01 to 2005-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Pagnotti Enterprises Inc → Jeddo-Highland Coal Company; 1979-07-01 to 2005-08-14; source msha-controller-operator-history
- **controller_controls_mine:** U S Operating Services Holdings Inc → Highland No 5; 1994-07-01 to 2011-01-02; source msha-controller-operator-history
- **operator_operates_mine:** U.S. Operating Services Company, LLC → Highland No 5; 2005-08-15 to 2011-04-07; source msha-controller-operator-history
- **controller_controls_operator:** U S Operating Services Holdings Inc → U.S. Operating Services Company, LLC; 2005-08-15 to 2011-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Calypso Energy Holdings LLC → Highland No 5; 2011-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calypso Energy Holdings LLC → U.S. Operating Services Company, LLC; 2011-01-03 to 2011-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Northampton Fuel Supply Company Inc → Highland No 5; 2011-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calypso Energy Holdings LLC → Highland No 5; 2011-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calypso Energy Holdings LLC → Northampton Fuel Supply Company Inc; 2011-04-08 to current/open; source msha-controller-operator-history