# Relationship history for MSHA mine 3002725

Current hierarchy: **Graymont Ltd → Graymont Materials (NY) Inc. → EGAN PIT**

- 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:** Graymont Ltd → EGAN PIT; 1984-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Malone Quarry → EGAN PIT; 1986-04-01 to 2004-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Graymont Ltd → Malone Quarry; 1986-04-01 to 2004-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Graymont Ltd → EGAN PIT; 2004-06-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Graymont Materials (NY) Inc. → EGAN PIT; 2004-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Graymont Ltd → Graymont Materials (NY) Inc.; 2004-08-02 to current/open; source msha-controller-operator-history