# Relationship history for MSHA mine 0901113

Current hierarchy: **Darrell  Blankinship; Troy  Blankinship → B & B SAND LLC → BLACK LAKE**

- 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:** B & B Sand LLC → BLACK LAKE; 1999-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Gaskin → BLACK LAKE; 1999-01-01 to 2009-05-26; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Gaskin → B & B Sand LLC; 1999-01-01 to 2009-05-26; source msha-controller-operator-history
- **controller_controls_operator:** M O  Blankenship → B & B Sand LLC; 1999-01-01 to 2009-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Darrell  Blankinship et al → BLACK LAKE; 2009-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrell  Blankinship et al → B & B Sand LLC; 2009-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Troy  Blankinship et al → B & B Sand LLC; 2009-05-27 to current/open; source msha-controller-operator-history