# Relationship history for MSHA mine 2602203

Current hierarchy: **Umholtz Willis E → Manhattan West Limited → Manhattan West Limited**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Rannd Resources Inc → Manhattan West Limited; 1992-04-01 to 1993-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Noel S  Tanner  et al → Manhattan West Limited; 1992-04-01 to 1993-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Noel S  Tanner  et al → Rannd Resources Inc; 1992-04-01 to 1993-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Manhattan West Limited → Manhattan West Limited; 1993-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Umholtz Willis E Et Al → Manhattan West Limited; 1993-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Umholtz Willis E Et Al → Manhattan West Limited; 1993-09-01 to current/open; source msha-controller-operator-history