# Relationship history for MSHA mine 1509938

Current hierarchy: **Ferroglobe PLC → Ferroglobe USA Mining, LLC → Gatliff Tipple**

- 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 → Gatliff Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gatliff Coal Company Inc → Gatliff Tipple; 1976-09-01 to 2003-07-07; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Gatliff Coal Company Inc; 1976-09-01 to 2003-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Blue Gem Mining Inc → Gatliff Tipple; 2003-07-08 to 2006-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Carbon Partners A S → Gatliff Tipple; 2003-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carbon Partners A S → Blue Gem Mining Inc; 2003-07-08 to 2006-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Specialty Coal Processing Inc → Gatliff Tipple; 2006-03-22 to 2007-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Timothy L  Webb → Gatliff Tipple; 2006-03-22 to 2007-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Timothy L  Webb → Specialty Coal Processing Inc; 2006-03-22 to 2007-01-07; source msha-controller-operator-history
- **controller_controls_mine:** James  Cox et al → Gatliff Tipple; 2007-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Cox et al → Specialty Coal Processing Inc; 2007-01-08 to 2007-04-30; source msha-controller-operator-history
- **controller_controls_mine:** James  Cox et al → Gatliff Tipple; 2007-03-30 to 2009-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Ferroglobe USA Mining, LLC → Gatliff Tipple; 2007-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Cox et al → Ferroglobe USA Mining, LLC; 2007-05-01 to 2009-07-16; source msha-controller-operator-history
- **controller_controls_mine:** NCGPAsset Holdings II LP et al → Gatliff Tipple; 2009-07-17 to 2011-07-31; source msha-controller-operator-history
- **controller_controls_operator:** NCGPAsset Holdings II LP et al → Ferroglobe USA Mining, LLC; 2009-07-17 to 2011-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Ferroglobe PLC → Gatliff Tipple; 2011-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ferroglobe PLC → Ferroglobe USA Mining, LLC; 2011-08-01 to current/open; source msha-controller-operator-history