# Relationship history for MSHA mine 4503501

Current hierarchy: **Ronald G  Benson; Keith  Benson → City Transfer Inc → Marine View S & G**

- 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:** Keith  Benson  et al → Marine View S & G; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** City Transfer Inc → Marine View S & G; 2001-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith  Benson  et al → City Transfer Inc; 2001-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald G  Benson  et al → City Transfer Inc; 2001-10-16 to current/open; source msha-controller-operator-history