# Relationship history for MSHA mine 2002940

Current hierarchy: **Mark L  Manthei; James  Manthei → MDC Contracting LLC → #1313 Cedar Rapids**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** James  Manthei et al → #1313 Cedar Rapids; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Manthei Development Corp → #1313 Cedar Rapids; 1994-09-01 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_operator:** James  Manthei et al → Manthei Development Corp; 1994-09-01 to 2002-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Mark L  Manthei et al → Manthei Development Corp; 1994-09-01 to 2002-12-31; source msha-controller-operator-history
- **operator_operates_mine:** MDC Contracting LLC → #1313 Cedar Rapids; 2003-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark L  Manthei et al → #1313 Cedar Rapids; 2003-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark L  Manthei et al → MDC Contracting LLC; 2003-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Manthei et al → MDC Contracting LLC; 2003-01-01 to current/open; source msha-controller-operator-history