# Relationship history for MSHA mine 4100852

Current hierarchy: **Koch Industries Inc → Georgia-Pacific Gypsum LLC → Fredericksburg 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:** Fredericksburg Gypsum Company → Fredericksburg Quarry; 1950-01-01 to 1987-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Windsor Properties Inc → Fredericksburg Quarry; 1950-01-01 to 1989-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Windsor Properties Inc → Fredericksburg Gypsum Company; 1950-01-01 to 1987-06-08; source msha-controller-operator-history
- **operator_operates_mine:** Standard Gypsum Corp → Fredericksburg Quarry; 1987-06-09 to 1996-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Caraustar Industries Et Al → Fredericksburg Quarry; 1987-06-09 to 1996-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Caraustar Industries Et Al → Standard Gypsum Corp; 1987-06-09 to 1996-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Standard Gypsum LP → Fredericksburg Quarry; 1996-04-01 to 2006-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Temple-Inland Inc et al → Fredericksburg Quarry; 1996-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Temple-Inland Inc et al → Standard Gypsum LP; 1996-04-01 to 2006-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Caraustar Industries Inc et al → Standard Gypsum LP; 1996-04-01 to 2006-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Temple-Inland, Inc. → Fredericksburg Quarry; 2006-05-01 to 2013-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Temple-Inland Inc → Fredericksburg Quarry; 2006-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Temple-Inland Inc → Temple-Inland, Inc.; 2006-05-01 to 2013-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Koch Industries Inc → Fredericksburg Quarry; 2006-12-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Georgia-Pacific Gypsum II LLC → Fredericksburg Quarry; 2013-07-19 to 2021-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Koch Industries Inc → Fredericksburg Quarry; 2013-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → Georgia-Pacific Gypsum II LLC; 2013-07-19 to 2021-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Georgia-Pacific Gypsum LLC → Fredericksburg Quarry; 2021-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Koch Industries Inc → Georgia-Pacific Gypsum LLC; 2021-05-05 to current/open; source msha-controller-operator-history