# Relationship history for MSHA mine 0404263

Current hierarchy: **P W Gillibrand Company Inc → Riverside Milling Company, LLC → Riverside Operation**

- 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

- **controller_controls_mine:** Oglebay Norton Company → Riverside Operation; 1950-01-01 to 2008-02-12; source msha-controller-operator-history
- **operator_operates_mine:** Premier Silica LLC → Riverside Operation; 1978-03-09 to 2017-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → Premier Silica LLC; 1978-03-09 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Riverside Operation; 2008-02-13 to 2012-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Premier Silica LLC; 2008-02-13 to 2012-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Pioneer Natural Resources USA Incorporated → Riverside Operation; 2012-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer Natural Resources USA Incorporated → Premier Silica LLC; 2012-04-02 to 2017-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Riverside Milling Company, LLC → Riverside Operation; 2017-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Celine L  Gillibrand → Riverside Operation; 2017-06-01 to 2022-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Celine L  Gillibrand → Riverside Milling Company, LLC; 2017-06-01 to 2022-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Celine L Gillibrand Trust → Riverside Operation; 2022-07-06 to 2024-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Celine L Gillibrand Trust → Riverside Milling Company, LLC; 2022-07-06 to 2024-12-26; source msha-controller-operator-history
- **controller_controls_mine:** P W Gillibrand Company Inc → Riverside Operation; 2024-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** P W Gillibrand Company Inc → Riverside Milling Company, LLC; 2024-12-27 to current/open; source msha-controller-operator-history