# Relationship history for MSHA mine 4703823

Current hierarchy: **Will  Glusac; John  Cross → WP Operations, LLC. → Wisconsin Proppants Alma 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:** Will  Glusac et al → Wisconsin Proppants Alma Mine; 2015-08-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Turnkey Processing Solutions, LLC → Wisconsin Proppants Alma Mine; 2018-03-28 to 2018-09-30; source msha-controller-operator-history
- **controller_controls_mine:** John  Cross et al → Wisconsin Proppants Alma Mine; 2018-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Cross et al → Turnkey Processing Solutions, LLC; 2018-03-28 to 2018-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Will  Glusac et al → Turnkey Processing Solutions, LLC; 2018-03-28 to 2018-09-30; source msha-controller-operator-history
- **operator_operates_mine:** WP Operations, LLC → Wisconsin Proppants Alma Mine; 2018-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Will  Glusac et al → WP Operations, LLC; 2018-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Cross et al → WP Operations, LLC; 2018-10-01 to current/open; source msha-controller-operator-history