# Relationship history for MSHA mine 1900967

Current hierarchy: **John G  Shurtleff Jr → Triple J Screening & Trucking Inc. → Triple J Screening & Trucking Inc.**

- 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

- **operator_operates_mine:** Lakeside Crushing Corp → Triple J Screening & Trucking Inc.; 1978-10-01 to 2002-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Lorraine  De Moranville → Triple J Screening & Trucking Inc.; 1978-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lorraine  De Moranville → Lakeside Crushing Corp; 1978-10-01 to 2002-06-30; source msha-controller-operator-history
- **operator_operates_mine:** CAPE COD READY MIX INC. → Triple J Screening & Trucking Inc.; 2002-07-01 to 2009-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Bruce  MacGregor  et al → Triple J Screening & Trucking Inc.; 2002-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce  MacGregor  et al → CAPE COD READY MIX INC.; 2002-07-01 to 2009-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Our  et al → CAPE COD READY MIX INC.; 2002-07-01 to 2009-02-03; source msha-controller-operator-history
- **operator_operates_mine:** Triple J Screening & Trucking Inc. → Triple J Screening & Trucking Inc.; 2009-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John G  Shurtleff Jr → Triple J Screening & Trucking Inc.; 2009-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John G  Shurtleff Jr → Triple J Screening & Trucking Inc.; 2009-02-04 to current/open; source msha-controller-operator-history