# Relationship history for MSHA mine 1700731

Current hierarchy: **Justin  Loveitt → CHASE EXCAVATING INC → Cedar Rapids Track Crusher**

- 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:** CHASE EXCAVATING INC → Cedar Rapids Track Crusher; 2002-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** DAVID  CHASE → Cedar Rapids Track Crusher; 2002-06-18 to 2019-04-30; source msha-controller-operator-history
- **controller_controls_operator:** DAVID  CHASE → CHASE EXCAVATING INC; 2002-06-18 to 2019-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Justin  Loveitt → Cedar Rapids Track Crusher; 2019-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin  Loveitt → CHASE EXCAVATING INC; 2019-05-01 to current/open; source msha-controller-operator-history