# Relationship history for MSHA mine 0100640

Current hierarchy: **English China Clays PLC → Ecci Calcium Products Inc → ECCI SYLACAUGA**

- 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

- **operator_operates_mine:** Sylacauga Calcium Products Company → ECCI SYLACAUGA; 1950-01-01 to 1986-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Moretti-Harrah Marble Company → ECCI SYLACAUGA; 1950-01-01 to 1986-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Moretti-Harrah Marble Company → Sylacauga Calcium Products Company; 1950-01-01 to 1986-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Ecci Calcium Products Inc → ECCI SYLACAUGA; 1986-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** English China Clays PLC → ECCI SYLACAUGA; 1986-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** English China Clays PLC → Ecci Calcium Products Inc; 1986-10-16 to current/open; source msha-controller-operator-history