# Relationship history for MSHA mine 1519052

Current hierarchy: **DCM Resource Energies Inc; Sitter Drilling LLC → United Carbon Group, LLC → Mine #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

- **operator_operates_mine:** G & S Logging → Mine #1; 2006-10-11 to 2008-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Vic  Nantz Jr → Mine #1; 2006-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vic  Nantz Jr → G & S Logging; 2006-10-11 to 2008-06-22; source msha-controller-operator-history
- **operator_operates_mine:** United Carbon Group, LLC → Mine #1; 2008-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sitter Drilling LLC et al → Mine #1; 2008-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sitter Drilling LLC et al → United Carbon Group, LLC; 2008-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** DCM Resource Energies Inc et al → United Carbon Group, LLC; 2008-06-23 to current/open; source msha-controller-operator-history