# Relationship history for MSHA mine 3000963

Current hierarchy: **Colas S A → Upstone Materials Inc. → SARANAC LAKE 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Torrington Industries Inc → SARANAC LAKE QUARRY; 1950-01-01 to 1983-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Theodore  Zoli → SARANAC LAKE QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Theodore  Zoli → Torrington Industries Inc; 1950-01-01 to 1983-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Saranac Lake Quarry → SARANAC LAKE QUARRY; 1983-06-01 to 2004-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Graymont Ltd → SARANAC LAKE QUARRY; 1983-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Graymont Ltd → Saranac Lake Quarry; 1983-06-01 to 2004-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Graymont Ltd → SARANAC LAKE QUARRY; 2004-06-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Graymont Materials (NY) Inc. → SARANAC LAKE QUARRY; 2004-07-06 to 2017-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Graymont Ltd → Graymont Materials (NY) Inc.; 2004-07-06 to 2017-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → SARANAC LAKE QUARRY; 2017-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Upstone Materials Inc. → SARANAC LAKE QUARRY; 2017-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Upstone Materials Inc.; 2017-06-05 to current/open; source msha-controller-operator-history