# Relationship history for MSHA mine 0202915

Current hierarchy: **Duke  Francis; Marcia  Busching → Ashrock Llc → BENSCH RANCH**

- 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:** Ashrock Llc → BENSCH RANCH; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marcia  Busching  et al → BENSCH RANCH; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcia  Busching  et al → Ashrock Llc; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Duke  Francis  et al → Ashrock Llc; 2001-01-01 to current/open; source msha-controller-operator-history