# Relationship history for MSHA mine 4202233

Current hierarchy: **ACNR Holdings, Inc → Utah Land Resources, Inc. → West Ridge Mine**

- 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:** West Ridge Resources Inc → West Ridge Mine; 1999-03-01 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Andalex Resources B V → West Ridge Mine; 1999-03-01 to 2006-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Andalex Resources B V → West Ridge Resources Inc; 1999-03-01 to 2006-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → West Ridge Mine; 2006-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → West Ridge Resources Inc; 2006-08-09 to 2020-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Utah Land Resources, Inc. → West Ridge Mine; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** ACNR Holdings, Inc → West Ridge Mine; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → Utah Land Resources, Inc.; 2020-09-17 to current/open; source msha-controller-operator-history