# Relationship history for MSHA mine 2003180

Current hierarchy: **Mark L  Manthei; James  Manthei → Manthei Development Corp → SHALE HAUL**

- 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:** Mark L  Manthei et al → SHALE HAUL; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Manthei Development Corp → SHALE HAUL; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark L  Manthei et al → Manthei Development Corp; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Manthei et al → Manthei Development Corp; 2000-11-01 to current/open; source msha-controller-operator-history