# Relationship history for MSHA mine 4407211

Current hierarchy: **J Mark  Campbell → Clintwood Elkhorn Mining Company, LLC → Splashdam 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:** TECO Energy Inc → Splashdam Mine; 1988-04-26 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Harold E  Akers et al → Splashdam Mine; 2001-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tommy  Smith  et al → Splashdam Mine; 2004-05-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Creek Coal LLC → Splashdam Mine; 2007-11-07 to 2012-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Tommy  Smith  et al → Cedar Creek Coal LLC; 2007-11-07 to 2012-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Justus  et al → Cedar Creek Coal LLC; 2007-11-07 to 2012-12-17; source msha-controller-operator-history
- **operator_operates_mine:** Hubble Mining Company, LLC → Splashdam Mine; 2012-12-18 to 2016-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Harold E  Akers et al → Hubble Mining Company, LLC; 2012-12-18 to 2016-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Jim D  Akers et al → Hubble Mining Company, LLC; 2012-12-18 to 2016-12-09; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → Splashdam Mine; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Clintwood Elkhorn Mining Company, LLC → Splashdam Mine; 2016-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Clintwood Elkhorn Mining Company, LLC; 2016-12-10 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Clintwood Elkhorn Mining Company, LLC; 2016-12-10 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → Splashdam Mine; 2019-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Clintwood Elkhorn Mining Company, LLC; 2019-06-16 to current/open; source msha-controller-operator-history