# Relationship history for MSHA mine 4703597

Current hierarchy: **Bruce  Durand → Frontier Sand, LLC → Frontier Sand LaGesse Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Mike  O'Neill et al → Frontier Sand LaGesse Mine; 2010-07-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S&W LAGESSE INC → Frontier Sand LaGesse Mine; 2010-11-10 to 2011-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Samuel R  LaGesse → Frontier Sand LaGesse Mine; 2010-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Samuel R  LaGesse → S&W LAGESSE INC; 2010-11-10 to 2011-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Preferred Sands of Minnesota → Frontier Sand LaGesse Mine; 2011-05-05 to 2015-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Mike  O'Neill et al → Preferred Sands of Minnesota; 2011-05-05 to 2015-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Preferred Intermediate Holding Company, LLC → Frontier Sand LaGesse Mine; 2015-07-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Preferred Proppants, LLC → Frontier Sand LaGesse Mine; 2015-10-29 to 2018-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Preferred Intermediate Holding Company, LLC → Preferred Proppants, LLC; 2015-10-29 to 2018-06-07; source msha-controller-operator-history
- **operator_operates_mine:** Frontier Sand, LLC → Frontier Sand LaGesse Mine; 2018-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bruce  Durand → Frontier Sand LaGesse Mine; 2018-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce  Durand → Frontier Sand, LLC; 2018-06-08 to current/open; source msha-controller-operator-history