# Relationship history for MSHA mine 3609442

Current hierarchy: **Robindale Energy Services Inc → ROBINDALE ENERGY SERVICES, INC. → LUCERNE**

- 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:** Air Products & Chemicals Inc → LUCERNE; 1995-08-01 to 2001-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Robindale Energy Services Inc → LUCERNE; 2001-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → LUCERNE; 2001-08-24 to 2004-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Northern Star Generation Services Co LLC → LUCERNE; 2004-12-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cambria Fuel Management Company LLC → LUCERNE; 2006-07-27 to 2019-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Northern Star Generation Services Co LLC → LUCERNE; 2006-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Northern Star Generation Services Co LLC → Cambria Fuel Management Company LLC; 2006-07-27 to 2019-11-19; source msha-controller-operator-history
- **operator_operates_mine:** Cambria Reclamation Corp. → LUCERNE; 2019-11-20 to 2021-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Northern Star Generation Services Co LLC → Cambria Reclamation Corp.; 2019-11-20 to 2021-10-13; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Cambria Reclamation Corp.; 2019-11-20 to 2004-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Air Products & Chemicals Inc → Cambria Reclamation Corp.; 2019-11-20 to 2001-08-23; source msha-controller-operator-history
- **operator_operates_mine:** Compass Coal Co → LUCERNE; 2021-10-14 to 2023-02-01; source msha-controller-operator-history
- **controller_controls_mine:** P & N Coal Company → LUCERNE; 2021-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** P & N Coal Company → Compass Coal Co; 2021-10-14 to 2023-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Robindale Energy Services, Inc. → LUCERNE; 2023-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robindale Energy Services Inc → Robindale Energy Services, Inc.; 2023-02-02 to current/open; source msha-controller-operator-history