# Relationship history for MSHA mine 0202843

Current hierarchy: **Leslie D Briggs → ROCK RIDGE QUARRIES, INC. → Rock Ridge Quarries**

- 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:** 3 Winns Quarry's → Rock Ridge Quarries; 1999-09-01 to 2005-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Gutierrez et al → Rock Ridge Quarries; 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Gutierrez et al → 3 Winns Quarry's; 1999-09-01 to 2005-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Lola  Gutierrez et al → 3 Winns Quarry's; 1999-09-01 to 2005-07-18; source msha-controller-operator-history
- **operator_operates_mine:** ROCK RIDGE QUARRIES, INC. → Rock Ridge Quarries; 2005-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert J  Briggs → Rock Ridge Quarries; 2005-07-19 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert J  Briggs → ROCK RIDGE QUARRIES, INC.; 2005-07-19 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Leslie D Briggs → Rock Ridge Quarries; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leslie D Briggs → ROCK RIDGE QUARRIES, INC.; 2022-01-01 to current/open; source msha-controller-operator-history