# Relationship history for MSHA mine 1200665

Current hierarchy: **Lon E  Knecht → Knecht Excavating dba Star Excavating → Star Materials**

- 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:** H & W Sand & Gravel Corp → Star Materials; 1950-01-01 to 1990-02-04; source msha-controller-operator-history
- **controller_controls_mine:** David A  Musser → Star Materials; 1950-01-01 to 1990-02-04; source msha-controller-operator-history
- **controller_controls_operator:** David A  Musser → H & W Sand & Gravel Corp; 1950-01-01 to 1990-02-04; source msha-controller-operator-history
- **operator_operates_mine:** Huntington Ready Mix Inc → Star Materials; 1990-02-05 to 2006-10-22; source msha-controller-operator-history
- **controller_controls_mine:** James  Marcuccilli → Star Materials; 1990-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Marcuccilli → Huntington Ready Mix Inc; 1990-02-05 to 2006-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Star Excavating → Star Materials; 2006-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lon E  Knecht → Star Materials; 2006-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lon E  Knecht → Star Excavating; 2006-10-23 to current/open; source msha-controller-operator-history