# Relationship history for MSHA mine 3606210

Current hierarchy: **Mepco Intermediate Holdings, LLC → CORESCO LLC → Cobra Mine Prep Plant**

- 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:** Dunkard Mining Company → Cobra Mine Prep Plant; 1976-01-01 to 1984-01-26; source msha-controller-operator-history
- **controller_controls_mine:** James E  Bergesen → Cobra Mine Prep Plant; 1976-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Bergesen → Dunkard Mining Company; 1976-01-01 to 1984-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Prodeco Investments Inc → Cobra Mine Prep Plant; 1984-01-01 to 1986-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Dunkard Mining Company → Cobra Mine Prep Plant; 1984-01-27 to 1986-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Prodeco Investments Inc → Dunkard Mining Company; 1984-01-27 to 1986-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Dunkard Mining Company → Cobra Mine Prep Plant; 1986-02-27 to 1993-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Bow Valley Industries Ltd → Cobra Mine Prep Plant; 1986-02-27 to 1993-10-18; source msha-controller-operator-history
- **controller_controls_operator:** Bow Valley Industries Ltd → Dunkard Mining Company; 1986-02-27 to 1993-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Joseph P  Tassone et al → Cobra Mine Prep Plant; 1992-06-23 to 1997-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Dunkard Mining Company → Cobra Mine Prep Plant; 1993-10-19 to 1997-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Joseph P  Tassone et al → Dunkard Mining Company; 1993-10-19 to 1997-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Dunkard Mining Co. → Cobra Mine Prep Plant; 1997-11-01 to 2002-11-07; source msha-controller-operator-history
- **controller_controls_mine:** Aloe Holding Inc → Cobra Mine Prep Plant; 1997-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aloe Holding Inc → Dunkard Mining Co.; 1997-11-01 to 2002-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Cobra Mining LLC → Cobra Mine Prep Plant; 2002-11-08 to 2010-03-03; source msha-controller-operator-history
- **controller_controls_mine:** David  Kovach → Cobra Mine Prep Plant; 2002-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Kovach → Cobra Mining LLC; 2002-11-08 to 2010-03-03; source msha-controller-operator-history
- **controller_controls_mine:** GenPower Holdings LP  et al → Cobra Mine Prep Plant; 2008-02-26 to 2013-11-09; source msha-controller-operator-history
- **operator_operates_mine:** CORESCO LLC → Cobra Mine Prep Plant; 2010-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** GenPower Holdings LP  et al → CORESCO LLC; 2010-03-04 to 2013-11-09; source msha-controller-operator-history
- **controller_controls_operator:** James L  Laurita Jr  et al → CORESCO LLC; 2010-03-04 to 2013-11-09; source msha-controller-operator-history
- **controller_controls_mine:** Mepco Intermediate Holdings, LLC → Cobra Mine Prep Plant; 2013-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mepco Intermediate Holdings, LLC → CORESCO LLC; 2013-11-10 to current/open; source msha-controller-operator-history