# Relationship history for MSHA mine 3500933

Current hierarchy: **Dale  Olson; Steven  Bennett → Southwest Quarries Llc → TIMMONS 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

- **operator_operates_mine:** C C Meisel Company Inc → TIMMONS QUARRY; 1950-01-01 to 1995-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Lloyd  Town et al → TIMMONS QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lloyd  Town et al → C C Meisel Company Inc; 1950-01-01 to 1995-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Timmons Rock Company Inc → TIMMONS QUARRY; 1995-04-26 to 1998-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Craig  Timmons → TIMMONS QUARRY; 1995-04-26 to 1998-05-28; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Timmons → Timmons Rock Company Inc; 1995-04-26 to 1998-05-28; source msha-controller-operator-history
- **operator_operates_mine:** Southwest Quarries Llc → TIMMONS QUARRY; 1998-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven  Bennett → TIMMONS QUARRY; 1998-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Bennett → Southwest Quarries Llc; 1998-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale  Olson → Southwest Quarries Llc; 1998-05-29 to current/open; source msha-controller-operator-history