# Relationship history for MSHA mine 0504358

Current hierarchy: **Adrian August  Absmeier → Absmeier Landscaping & Construction → PORTABLE CRUSHER**

- 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:** Debra  Malouff et al → PORTABLE CRUSHER; 1982-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Malouff Construction → PORTABLE CRUSHER; 1988-06-01 to 2008-04-10; source msha-controller-operator-history
- **controller_controls_operator:** Debra  Malouff et al → Malouff Construction; 1988-06-01 to 2008-04-10; source msha-controller-operator-history
- **controller_controls_operator:** Stephen  Malouff et al → Malouff Construction; 1988-06-01 to 2008-04-10; source msha-controller-operator-history
- **operator_operates_mine:** Absmeier Landscaping & Construction → PORTABLE CRUSHER; 2008-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adrian August  Absmeier → PORTABLE CRUSHER; 2008-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adrian August  Absmeier → Absmeier Landscaping & Construction; 2008-04-11 to current/open; source msha-controller-operator-history