# Relationship history for MSHA mine 2601187

Current hierarchy: **Smith Robert J & Anthony Selig → Comstock Minerals Company → Dixie Comstock 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:** M O O B Company → Dixie Comstock Mine; 1982-11-01 to 1987-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Hunter Richard-Hans Rasmussen Et Al → Dixie Comstock Mine; 1982-11-01 to 1987-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Hunter Richard-Hans Rasmussen Et Al → M O O B Company; 1982-11-01 to 1987-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Comstock Minerals Company → Dixie Comstock Mine; 1987-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Robert J & Anthony Selig → Dixie Comstock Mine; 1987-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Robert J & Anthony Selig → Comstock Minerals Company; 1987-04-08 to current/open; source msha-controller-operator-history