# Relationship history for MSHA mine 4605121

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Rockspring Development Inc → Camp Creek Mine**

- 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:** Exxon Mobil Corp → Camp Creek Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Monterey Coal Company → Camp Creek Mine; 1976-05-21 to 1991-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Exxon Mobil Corp → Monterey Coal Company; 1976-05-21 to 1991-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Robert B  Beatty → Camp Creek Mine; 1991-04-01 to 1994-01-12; source msha-controller-operator-history
- **operator_operates_mine:** Char-Coal Company Inc → Camp Creek Mine; 1991-04-12 to 1994-01-12; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  Beatty → Char-Coal Company Inc; 1991-04-12 to 1994-01-12; source msha-controller-operator-history
- **operator_operates_mine:** Rockspring Development Inc → Camp Creek Mine; 1994-01-13 to 1994-12-05; source msha-controller-operator-history
- **controller_controls_mine:** Edward  Malonis → Camp Creek Mine; 1994-01-13 to 1994-12-05; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Malonis → Rockspring Development Inc; 1994-01-13 to 1994-12-05; source msha-controller-operator-history
- **operator_operates_mine:** Rockspring Development Inc → Camp Creek Mine; 1994-12-06 to 2005-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Rag Aktiengesellschaft → Camp Creek Mine; 1994-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rag Aktiengesellschaft → Rockspring Development Inc; 1994-12-06 to 2005-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Rockspring Development Inc → Camp Creek Mine; 2005-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Foundation Coal Corporation → Camp Creek Mine; 2005-06-04 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Foundation Coal Corporation → Rockspring Development Inc; 2005-06-04 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Camp Creek Mine; 2009-07-31 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Rockspring Development Inc; 2009-07-31 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Camp Creek Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Rockspring Development Inc; 2016-07-26 to current/open; source msha-controller-operator-history