# Relationship history for MSHA mine 0103141

Current hierarchy: **Basic Sand & Gravel Inc → Basic Sand & Gravel, Inc. → Basic Sand & Gravel, Inc.**

- 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:** Clark Sand & Gravel → Basic Sand & Gravel, Inc.; 1999-03-01 to 1999-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Grady C  Glover → Basic Sand & Gravel, Inc.; 1999-03-01 to 1999-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Grady C  Glover → Clark Sand & Gravel; 1999-03-01 to 1999-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Giddins Brothers Sand & Gravel → Basic Sand & Gravel, Inc.; 1999-10-15 to 2001-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Edward  Giddins  et al → Basic Sand & Gravel, Inc.; 1999-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Giddins  et al → Giddins Brothers Sand & Gravel; 1999-10-15 to 2001-05-22; source msha-controller-operator-history
- **controller_controls_operator:** John  Giddins  et al → Giddins Brothers Sand & Gravel; 1999-10-15 to 2001-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Basic Sand & Gravel, Inc. → Basic Sand & Gravel, Inc.; 2001-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Basic Sand & Gravel Inc → Basic Sand & Gravel, Inc.; 2001-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Basic Sand & Gravel Inc → Basic Sand & Gravel, Inc.; 2001-05-23 to current/open; source msha-controller-operator-history