# Relationship history for MSHA mine 1601574

Current hierarchy: **Reginald G Bourne II; Steve  King; Steve  Singletary → KSB Holdings LLC dba A-1 Aggregates → River Road**

- 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:** Margie  Ellis  et al → River Road; 2000-07-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A-1 Sand and Gravel LLC → River Road; 2017-08-17 to 2022-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Margie  Ellis  et al → A-1 Sand and Gravel LLC; 2017-08-17 to 2022-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Pat  Ellis  et al → A-1 Sand and Gravel LLC; 2017-08-17 to 2022-12-14; source msha-controller-operator-history
- **operator_operates_mine:** KSB Holdings LLC dba A-1 Aggregates → River Road; 2022-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  King et al → River Road; 2022-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  King et al → KSB Holdings LLC dba A-1 Aggregates; 2022-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reginald G Bourne II et al → KSB Holdings LLC dba A-1 Aggregates; 2022-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Singletary et al → KSB Holdings LLC dba A-1 Aggregates; 2022-12-15 to current/open; source msha-controller-operator-history