# Relationship history for MSHA mine 0900961

Current hierarchy: **Flatwoods Contracting Services LLC; Strategic Seek One, LLC → Granite City Quarries, LLC → Granite City Quarry**

- 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:** Scarborough Joe → Granite City Quarry; 1981-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ponderosa Granite Company Inc → Granite City Quarry; 1983-06-01 to 1984-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Scarborough Joe → Ponderosa Granite Company Inc; 1983-06-01 to 1984-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Moon Rock Granite Quarries Inc → Granite City Quarry; 1984-05-01 to 2004-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Marvin  Higginbotham → Granite City Quarry; 1984-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin  Higginbotham → Moon Rock Granite Quarries Inc; 1984-05-01 to 2004-05-31; source msha-controller-operator-history
- **operator_operates_mine:** South Ridge Granite Quarries, Inc. → Granite City Quarry; 2004-06-01 to 2022-01-11; source msha-controller-operator-history
- **controller_controls_mine:** David  Giannoni → Granite City Quarry; 2004-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Giannoni → South Ridge Granite Quarries, Inc.; 2004-06-01 to 2022-01-11; source msha-controller-operator-history
- **operator_operates_mine:** Granite City Quarries, LLC → Granite City Quarry; 2022-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Flatwoods Contracting Services LLC et al → Granite City Quarry; 2022-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Flatwoods Contracting Services LLC et al → Granite City Quarries, LLC; 2022-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Strategic Seek One, LLC et al → Granite City Quarries, LLC; 2022-01-12 to current/open; source msha-controller-operator-history