# Relationship history for MSHA mine 5001768

Current hierarchy: **Wayne Mark  Carpenter → Carpenter Contracting, Inc. → Carpenter Portable 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:** Anderson Construction Co. → Carpenter Portable Crusher; 2003-05-27 to 2015-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Michael W  Anderson → Carpenter Portable Crusher; 2003-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael W  Anderson → Anderson Construction Co.; 2003-05-27 to 2015-02-03; source msha-controller-operator-history
- **operator_operates_mine:** Carpenter Contracting, Inc. → Carpenter Portable Crusher; 2015-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wayne Mark  Carpenter → Carpenter Portable Crusher; 2015-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne Mark  Carpenter → Carpenter Contracting, Inc.; 2015-02-04 to current/open; source msha-controller-operator-history