# Relationship history for MSHA mine 0102894

Current hierarchy: **Burke R Wakefield; Robert R Ryan → SOUTHERN RED ROCK LLC → SOUTHERN RED ROCK, LLC**

- 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:** Western Red Rock-Div/Western Steel Inc → SOUTHERN RED ROCK, LLC; 1991-02-01 to 2002-05-14; source msha-controller-operator-history
- **controller_controls_mine:** William B  Cashion → SOUTHERN RED ROCK, LLC; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William B  Cashion → Western Red Rock-Div/Western Steel Inc; 1991-02-01 to 2002-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Red Rock Landscaping Supply Inc. → SOUTHERN RED ROCK, LLC; 2002-05-15 to 2003-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Davidson → SOUTHERN RED ROCK, LLC; 2002-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Davidson → Red Rock Landscaping Supply Inc.; 2002-05-15 to 2003-10-27; source msha-controller-operator-history
- **operator_operates_mine:** Southern Red Rock LLC → SOUTHERN RED ROCK, LLC; 2003-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Burke R  Wakefield → SOUTHERN RED ROCK, LLC; 2003-10-28 to 2017-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Burke R  Wakefield → Southern Red Rock LLC; 2003-10-28 to 2017-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Robert R Ryan et al → SOUTHERN RED ROCK, LLC; 2017-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert R Ryan et al → Southern Red Rock LLC; 2017-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Burke R Wakefield et al → Southern Red Rock LLC; 2017-07-01 to current/open; source msha-controller-operator-history