# Relationship history for MSHA mine 4800732

Current hierarchy: **Petri E Koivula → Eagle Specialty Materials LLC → Belle Ayr 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

- **operator_operates_mine:** Amax Coal West Inc → Belle Ayr Mine; 1973-01-01 to 1999-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Belle Ayr Mine; 1973-01-01 to 1999-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Amax Coal West Inc; 1973-01-01 to 1999-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Alpha Coal West, Inc. → Belle Ayr Mine; 1999-06-30 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Rag Aktiengesellschaft → Belle Ayr Mine; 1999-06-30 to 2004-07-29; source msha-controller-operator-history
- **controller_controls_operator:** Rag Aktiengesellschaft → Alpha Coal West, Inc.; 1999-06-30 to 2004-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Foundation Coal Corporation → Belle Ayr Mine; 2004-07-30 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Foundation Coal Corporation → Alpha Coal West, Inc.; 2004-07-30 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Jeffery A  Hoops → Belle Ayr Mine; 2009-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Belle Ayr Mine; 2009-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Alpha Coal West, Inc.; 2009-07-31 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Contura Coal West LLC → Belle Ayr Mine; 2016-07-26 to 2017-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Belle Ayr Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Contura Coal West LLC; 2016-07-26 to 2017-12-08; source msha-controller-operator-history
- **operator_operates_mine:** Blackjewel LLC → Belle Ayr Mine; 2017-12-09 to 2019-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery A  Hoops → Blackjewel LLC; 2017-12-09 to 2019-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Specialty Materials LLC → Belle Ayr Mine; 2019-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael T  Costello → Belle Ayr Mine; 2019-10-18 to 2020-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Michael T  Costello → Eagle Specialty Materials LLC; 2019-10-18 to 2020-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Petri E Koivula et al → Belle Ayr Mine; 2020-08-11 to 2023-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Petri E Koivula et al → Eagle Specialty Materials LLC; 2020-08-11 to 2023-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Jamison et al → Eagle Specialty Materials LLC; 2020-08-11 to 2023-05-17; source msha-controller-operator-history
- **controller_controls_operator:** John  McNab et al → Eagle Specialty Materials LLC; 2020-08-11 to 2023-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Petri E Koivula et al → Belle Ayr Mine; 2023-05-18 to 2026-08-11; source msha-controller-operator-history
- **controller_controls_operator:** Petri E Koivula et al → Eagle Specialty Materials LLC; 2023-05-18 to 2026-08-11; source msha-controller-operator-history
- **controller_controls_operator:** David Michael  Jamison et al → Eagle Specialty Materials LLC; 2023-05-18 to 2026-08-11; source msha-controller-operator-history
- **controller_controls_mine:** Petri E Koivula → Belle Ayr Mine; 2026-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Petri E Koivula → Eagle Specialty Materials LLC; 2026-08-12 to current/open; source msha-controller-operator-history