# Relationship history for MSHA mine 0301806

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → El Paso Quarry**

- 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 → El Paso Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Webco Mining Inc → El Paso Quarry; 1998-11-01 to 2016-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Charles T  Weaver → El Paso Quarry; 1998-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles T  Weaver → Webco Mining Inc; 1998-11-01 to 2016-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → El Paso Quarry; 2016-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2016-08-01 to current/open; source msha-controller-operator-history