# Relationship history for MSHA mine 3000968

Current hierarchy: **Carl J  Clemente → Century Aggregates Inc → CENTURY AGGREGATES FISHKILL MINE**

- 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:** Southern Dutchess Sand &Gravel → CENTURY AGGREGATES FISHKILL MINE; 1950-01-01 to 2014-05-19; source msha-controller-operator-history
- **controller_controls_mine:** John  Montfort → CENTURY AGGREGATES FISHKILL MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Montfort → Southern Dutchess Sand &Gravel; 1950-01-01 to 2014-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Carl J  Clemente  et al → CENTURY AGGREGATES FISHKILL MINE; 2005-08-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Highland Valley Sand & Gravel LLC → CENTURY AGGREGATES FISHKILL MINE; 2014-05-20 to 2019-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Jacqueline  Montfort → CENTURY AGGREGATES FISHKILL MINE; 2014-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jacqueline  Montfort → Highland Valley Sand & Gravel LLC; 2014-05-20 to 2019-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Century Aggregates Inc → CENTURY AGGREGATES FISHKILL MINE; 2019-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl J  Clemente  et al → Century Aggregates Inc; 2019-03-15 to current/open; source msha-controller-operator-history