# Relationship history for MSHA mine 4200099

Current hierarchy: **Global One Transport Inc → Price River Terminal, LLC → Wellington Prep Plant Area**

- 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:** Kaiser Steel Corp → Wellington Prep Plant Area; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** United States Steel Mining Company Inc → Wellington Prep Plant Area; 1950-01-01 to 1986-01-09; source msha-controller-operator-history
- **controller_controls_mine:** Usx Corp → Wellington Prep Plant Area; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Usx Corp → United States Steel Mining Company Inc; 1950-01-01 to 1986-01-09; source msha-controller-operator-history
- **operator_operates_mine:** Kaiser Coal Corp → Wellington Prep Plant Area; 1986-01-10 to 1989-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Kaiser Steel Corp → Kaiser Coal Corp; 1986-01-10 to 1989-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Nevada Electric Investment Company → Wellington Prep Plant Area; 1989-10-30 to 1997-06-24; source msha-controller-operator-history
- **controller_controls_mine:** NV Energy dba Nevada Power Company → Wellington Prep Plant Area; 1989-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NV Energy dba Nevada Power Company → Nevada Electric Investment Company; 1989-10-30 to 1997-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Covol Technologies Inc → Wellington Prep Plant Area; 1997-06-25 to 2000-09-10; source msha-controller-operator-history
- **controller_controls_mine:** Brent M  Cook → Wellington Prep Plant Area; 1997-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brent M  Cook → Covol Technologies Inc; 1997-06-25 to 2000-09-10; source msha-controller-operator-history
- **operator_operates_mine:** Techmat Llc → Wellington Prep Plant Area; 2000-09-11 to 2001-04-02; source msha-controller-operator-history
- **controller_controls_mine:** James D  Stout et al → Wellington Prep Plant Area; 2000-09-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James D  Stout et al → Techmat Llc; 2000-09-11 to 2001-04-02; source msha-controller-operator-history
- **operator_operates_mine:** Nevada Electric Investment Company → Wellington Prep Plant Area; 2001-04-03 to 2013-11-06; source msha-controller-operator-history
- **controller_controls_operator:** NV Energy dba Nevada Power Company → Nevada Electric Investment Company; 2001-04-03 to 2013-11-06; source msha-controller-operator-history
- **operator_operates_mine:** Price River Terminal, LLC → Wellington Prep Plant Area; 2013-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Global One Transport Inc → Wellington Prep Plant Area; 2013-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Global One Transport Inc → Price River Terminal, LLC; 2013-11-07 to current/open; source msha-controller-operator-history