# Relationship history for MSHA mine 3301642

Current hierarchy: **Chattin William Jeffrey & William H → Chattin Concrete → Chattin Sand & Gravel Mine #1**

- 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:** Seal Builders Supply Corp → Chattin Sand & Gravel Mine #1; 1950-01-01 to 1983-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Seal Builders Supply Corp → Chattin Sand & Gravel Mine #1; 1950-01-01 to 1983-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Seal Builders Supply Corp → Seal Builders Supply Corp; 1950-01-01 to 1983-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Chattin Concrete → Chattin Sand & Gravel Mine #1; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chattin William Jeffrey & William H → Chattin Sand & Gravel Mine #1; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chattin William Jeffrey & William H → Chattin Concrete; 1983-08-01 to current/open; source msha-controller-operator-history