# Relationship history for MSHA mine 4003063

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Grimsley Sand 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Rogers Group Inc → Grimsley Sand Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Allen  Linder et al → Grimsley Sand Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Allen  Linder et al → Grimsley Sand Mine; 1991-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sand Supply → Grimsley Sand Mine; 1992-06-01 to 2002-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Eward  Hood → Grimsley Sand Mine; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eward  Hood → Sand Supply; 1992-06-01 to 2002-09-29; source msha-controller-operator-history
- **operator_operates_mine:** Plateau Sand Co. → Grimsley Sand Mine; 2002-09-30 to 2004-01-21; source msha-controller-operator-history
- **controller_controls_operator:** Allen  Linder et al → Plateau Sand Co.; 2002-09-30 to 2004-01-21; source msha-controller-operator-history
- **controller_controls_mine:** W T  Ratliff Jr  et al → Grimsley Sand Mine; 2003-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Livingston Limestone Co Inc → Grimsley Sand Mine; 2004-01-22 to 2004-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Allen  Linder et al → Livingston Limestone Co Inc; 2004-01-22 to 2004-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Tennessee Aggregate Company, LLC → Grimsley Sand Mine; 2004-04-01 to 2008-06-30; source msha-controller-operator-history
- **controller_controls_operator:** W T  Ratliff Jr  et al → Tennessee Aggregate Company, LLC; 2004-04-01 to 2008-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Donna R  Mc Allister  et al → Tennessee Aggregate Company, LLC; 2004-04-01 to 2008-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Grimsley Sand Mine; 2008-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2008-07-01 to current/open; source msha-controller-operator-history