# Relationship history for MSHA mine 1900516

Current hierarchy: **V B  Castellani; Kathleen  Herbert → Fletcher Granite Company Llc → MILFORD QUARRY**

- 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

- **controller_controls_mine:** Herbert E  Fletcher → MILFORD QUARRY; 1950-01-01 to 1989-08-14; source msha-controller-operator-history
- **operator_operates_mine:** H E Fletcher Company → MILFORD QUARRY; 1984-03-01 to 1989-08-14; source msha-controller-operator-history
- **controller_controls_operator:** Herbert E  Fletcher → H E Fletcher Company; 1984-03-01 to 1989-08-14; source msha-controller-operator-history
- **controller_controls_mine:** Pioneer International Ltd → MILFORD QUARRY; 1989-01-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fletcher Granite Company Inc → MILFORD QUARRY; 1989-08-15 to 1999-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer International Ltd → Fletcher Granite Company Inc; 1989-08-15 to 1999-04-01; source msha-controller-operator-history
- **controller_controls_mine:** V B  Castellani  et al → MILFORD QUARRY; 1999-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fletcher Granite Company Llc → MILFORD QUARRY; 1999-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** V B  Castellani  et al → Fletcher Granite Company Llc; 1999-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kathleen  Herbert et al → Fletcher Granite Company Llc; 1999-04-02 to current/open; source msha-controller-operator-history