# Relationship history for MSHA mine 3102257

Current hierarchy: **Randy  Jordan; Chester  Patterson → Blue Rock Materials, LLC → McNabb 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:** Blue Rock Materials, LLC → McNabb Quarry; 2010-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bruna  Dube → McNabb Quarry; 2010-04-12 to 2015-01-07; source msha-controller-operator-history
- **controller_controls_operator:** Bruna  Dube → Blue Rock Materials, LLC; 2010-04-12 to 2015-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Chester  Patterson et al → McNabb Quarry; 2015-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Patterson et al → Blue Rock Materials, LLC; 2015-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Jordan et al → Blue Rock Materials, LLC; 2015-01-08 to current/open; source msha-controller-operator-history