# Relationship history for MSHA mine 1001894

Current hierarchy: **Kevin  Rhodehouse → Rhodehouse Construction → ARROW HEAD SAND P.P.**

- 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:** Arrow Head Sand Inc/Vaughn Andersen → ARROW HEAD SAND P.P.; 1993-11-01 to 1997-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Clara  Anderson → ARROW HEAD SAND P.P.; 1993-11-01 to 1997-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Clara  Anderson → Arrow Head Sand Inc/Vaughn Andersen; 1993-11-01 to 1997-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Rhodehouse Construction → ARROW HEAD SAND P.P.; 1997-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Rhodehouse → ARROW HEAD SAND P.P.; 1997-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Rhodehouse → Rhodehouse Construction; 1997-08-14 to current/open; source msha-controller-operator-history