# Relationship history for MSHA mine 3607532

Current hierarchy: **Italcementi Spa → Essroc Materials Inc → ESSROC AGGREGATES**

- 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

- **controller_controls_mine:** Michael  Carlow  et al → ESSROC AGGREGATES; 1980-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sme Inc → ESSROC AGGREGATES; 1984-01-01 to 1988-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Carlow  et al → Sme Inc; 1984-01-01 to 1988-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence  Ousky → ESSROC AGGREGATES; 1988-07-15 to 1990-09-10; source msha-controller-operator-history
- **operator_operates_mine:** United States Cement Company → ESSROC AGGREGATES; 1988-08-29 to 1990-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Ousky → United States Cement Company; 1988-08-29 to 1990-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Essroc Materials Inc → ESSROC AGGREGATES; 1990-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Italcementi Spa → ESSROC AGGREGATES; 1990-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Italcementi Spa → Essroc Materials Inc; 1990-02-27 to current/open; source msha-controller-operator-history