# Relationship history for MSHA mine 0200730

Current hierarchy: **Consolidated Gold Fields Limited → Arc Materials Corp D/B/A Wmk Transit Mix → Kingman Div Plant #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:** Wmk Transit Mix → Kingman Div Plant #1; 1950-01-01 to 1980-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Taggart Construction Company → Kingman Div Plant #1; 1950-01-01 to 1980-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Taggart Construction Company → Wmk Transit Mix; 1950-01-01 to 1980-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Arc Materials Corp D/B/A Wmk Transit Mix → Kingman Div Plant #1; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Consolidated Gold Fields Limited → Kingman Div Plant #1; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Consolidated Gold Fields Limited → Arc Materials Corp D/B/A Wmk Transit Mix; 1980-03-01 to current/open; source msha-controller-operator-history