# Relationship history for MSHA mine 1601570

Current hierarchy: **Marcus L Dyess → Superior Sand and Gravel → Plant 1**

- 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

- **controller_controls_mine:** M Lane  Dyess et al → Plant 1; 2014-09-10 to 2017-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Marc C  Dyess → Plant 1; 2017-03-24 to 2019-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Regional Sand and Gravel, LLC → Plant 1; 2017-06-27 to 2020-09-22; source msha-controller-operator-history
- **controller_controls_operator:** M Lane  Dyess et al → Regional Sand and Gravel, LLC; 2017-06-27 to 2017-03-23; source msha-controller-operator-history
- **controller_controls_operator:** M Renee  Miller et al → Regional Sand and Gravel, LLC; 2017-06-27 to 2017-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Marc C  Dyess → Regional Sand and Gravel, LLC; 2017-06-27 to 2019-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Marcus C  Dyess et al → Plant 1; 2020-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcus C  Dyess et al → Regional Sand and Gravel, LLC; 2020-01-01 to 2020-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Marcus Lane  Dyess et al → Regional Sand and Gravel, LLC; 2020-01-01 to 2020-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Superior Sand and Gravel → Plant 1; 2020-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marcus L Dyess → Plant 1; 2020-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcus L Dyess → Superior Sand and Gravel; 2020-09-23 to current/open; source msha-controller-operator-history