# Relationship history for MSHA mine 1202251

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Knox Expanded Reserves**

- 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:** Rogers Group Inc → Knox Expanded Reserves; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darrell  Jones → Knox Expanded Reserves; 1988-07-11 to 2014-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Jones and Sons, Inc. → Knox Expanded Reserves; 1999-04-01 to 2022-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Jones → Jones and Sons, Inc.; 1999-04-01 to 2014-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Kurt A  Jones → Knox Expanded Reserves; 2014-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt A  Jones → Jones and Sons, Inc.; 2014-03-21 to 2022-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Knox Expanded Reserves; 2022-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2022-04-05 to current/open; source msha-controller-operator-history