# Relationship history for MSHA mine 0901047

Current hierarchy: **David  Giannoni → South Ridge Granite Quarries II Inc. → South Ridge Granite Quarries II 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** B & M Quarries Inc → South Ridge Granite Quarries II Inc.; 1990-01-01 to 2015-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Adams Faye & Mac Thornton → South Ridge Granite Quarries II Inc.; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Faye & Mac Thornton → B & M Quarries Inc; 1990-01-01 to 2015-05-25; source msha-controller-operator-history
- **operator_operates_mine:** South Ridge Granite Quarries II Inc. → South Ridge Granite Quarries II Inc.; 2015-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David  Giannoni → South Ridge Granite Quarries II Inc.; 2015-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Giannoni → South Ridge Granite Quarries II Inc.; 2015-05-26 to current/open; source msha-controller-operator-history