# Relationship history for MSHA mine 2103769

Current hierarchy: **S C R-Sibelco Nv → Shakopee Sand, LLC → Shakopee Sand**

- 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:** Shakopee Sand, LLC → Shakopee Sand; 2012-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Weldon  Gilbertson et al → Shakopee Sand; 2012-06-18 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Weldon  Gilbertson et al → Shakopee Sand, LLC; 2012-06-18 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Gilbertson et al → Shakopee Sand, LLC; 2012-06-18 to 2013-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Fairmount Santrol → Shakopee Sand; 2013-07-01 to 2018-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Fairmount Santrol → Shakopee Sand, LLC; 2013-07-01 to 2018-05-31; source msha-controller-operator-history
- **controller_controls_mine:** S C R-Sibelco Nv et al → Shakopee Sand; 2018-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** S C R-Sibelco Nv et al → Shakopee Sand, LLC; 2018-06-01 to current/open; source msha-controller-operator-history