# Relationship history for MSHA mine 2902435

Current hierarchy: **Ryan  Roper → ROPER CONSTRUCTION, INC. → Rio Bonito Aggregate**

- 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:** Southwest Paving and Grading Inc → Rio Bonito Aggregate; 2013-05-08 to 2018-05-31; source msha-controller-operator-history
- **controller_controls_mine:** D'Auna  Wood et al → Rio Bonito Aggregate; 2013-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** D'Auna  Wood et al → Southwest Paving and Grading Inc; 2013-05-08 to 2018-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Wood et al → Southwest Paving and Grading Inc; 2013-05-08 to 2018-05-31; source msha-controller-operator-history
- **operator_operates_mine:** ROPER CONSTRUCTION, INC. → Rio Bonito Aggregate; 2018-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ryan  Roper → Rio Bonito Aggregate; 2018-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan  Roper → ROPER CONSTRUCTION, INC.; 2018-06-01 to current/open; source msha-controller-operator-history