# Relationship history for MSHA mine 1518662

Current hierarchy: **Sev.en Global Investments a.s. → Blue Diamond Mining LLC → Bear Branch E3-1**

- 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:** TECO Energy Inc → Bear Branch E3-1; 2000-11-17 to 2015-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Perry County Coal, LLC. → Bear Branch E3-1; 2003-08-25 to 2019-09-26; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Perry County Coal, LLC.; 2003-08-25 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Blackhawk Mining LLC → Bear Branch E3-1; 2014-09-04 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Cambrian Coal Corp → Bear Branch E3-1; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Cambrian Coal Corp → Perry County Coal, LLC.; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → Bear Branch E3-1; 2019-06-16 to 2019-09-30; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Perry County Coal, LLC.; 2019-06-16 to 2019-09-26; source msha-controller-operator-history
- **operator_operates_mine:** Perry County Resources → Bear Branch E3-1; 2019-09-27 to 2021-03-24; source msha-controller-operator-history
- **controller_controls_mine:** American Resources Corporation → Bear Branch E3-1; 2019-09-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Resources Corporation → Perry County Resources; 2019-09-27 to 2021-03-24; source msha-controller-operator-history
- **controller_controls_mine:** American Resources Corporation → Bear Branch E3-1; 2019-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Resources Corporation → Perry County Coal, LLC.; 2019-10-01 to 2019-09-26; source msha-controller-operator-history
- **controller_controls_mine:** Sev.en Global Investments a.s. → Bear Branch E3-1; 2020-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Diamond Mining LLC → Bear Branch E3-1; 2021-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blackhawk Mining LLC → Blue Diamond Mining LLC; 2021-03-25 to 2020-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Sev.en Global Investments a.s. → Blue Diamond Mining LLC; 2021-03-25 to current/open; source msha-controller-operator-history