# Relationship history for MSHA mine 3102283

Current hierarchy: **Nick B Waycaster Jr → Smoky Mountain Natural Stone LLC → Mathews 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:** Smoky Mountain Natural Stone Co. → Mathews Quarry; 2013-05-20 to 2021-12-31; source msha-controller-operator-history
- **controller_controls_mine:** George E  Biddix → Mathews Quarry; 2013-05-20 to 2017-06-18; source msha-controller-operator-history
- **controller_controls_operator:** George E  Biddix → Smoky Mountain Natural Stone Co.; 2013-05-20 to 2017-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Nick B Waycaster Jr → Mathews Quarry; 2017-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nick B Waycaster Jr → Smoky Mountain Natural Stone Co.; 2017-06-19 to 2021-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Smoky Mountain Natural Stone LLC → Mathews Quarry; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nick B Waycaster Jr → Mathews Quarry; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nick B Waycaster Jr → Smoky Mountain Natural Stone LLC; 2022-01-01 to current/open; source msha-controller-operator-history