# Relationship history for MSHA mine 1900033

Current hierarchy: **Carl J  Clemente → Century Aggregates Inc → Century Perkins**

- 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:** Mario Pandolf Company Inc → Century Perkins; 1950-01-01 to 1983-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Anthony  Pandolf → Century Perkins; 1950-01-01 to 1983-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Anthony  Pandolf → Mario Pandolf Company Inc; 1950-01-01 to 1983-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Pandolf-Perkins Company Inc → Century Perkins; 1983-10-15 to 2012-11-27; source msha-controller-operator-history
- **controller_controls_mine:** E H Perkins Construction Inc → Century Perkins; 1983-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E H Perkins Construction Inc → Pandolf-Perkins Company Inc; 1983-10-15 to 2012-11-27; source msha-controller-operator-history
- **controller_controls_mine:** E H Perkins Construction Inc → Century Perkins; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl J  Clemente  et al → Century Perkins; 2005-08-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E H Perkins Construction Inc → Century Perkins; 2012-11-28 to 2023-01-02; source msha-controller-operator-history
- **controller_controls_operator:** E H Perkins Construction Inc → E H Perkins Construction Inc; 2012-11-28 to 2023-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Century Aggregates Inc → Century Perkins; 2023-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl J  Clemente  et al → Century Aggregates Inc; 2023-01-03 to current/open; source msha-controller-operator-history