# Relationship history for MSHA mine 4000817

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → TN River Sand & Gravel**

- 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

- **operator_operates_mine:** Teague Bros. Sand & Gravel Inc → TN River Sand & Gravel; 1950-01-01 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Group Inc → TN River Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** G L  Teague → TN River Sand & Gravel; 1950-01-01 to 2016-04-24; source msha-controller-operator-history
- **controller_controls_operator:** G L  Teague → Teague Bros. Sand & Gravel Inc; 1950-01-01 to 2016-04-24; source msha-controller-operator-history
- **controller_controls_mine:** Mark D  Teague et al → TN River Sand & Gravel; 2016-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark D  Teague et al → Teague Bros. Sand & Gravel Inc; 2016-04-25 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Felecia E  Kobeck et al → Teague Bros. Sand & Gravel Inc; 2016-04-25 to 2018-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → TN River Sand & Gravel; 2018-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2018-11-01 to current/open; source msha-controller-operator-history