# Relationship history for MSHA mine 0404749

Current hierarchy: **Elijah  Coleman; Debralee  Coleman → RoXsand → Troesh Recycling, Inc. dba RoXsand**

- 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:** Kolrich Sand & Gravel Company → Troesh Recycling, Inc. dba RoXsand; 1985-07-01 to 1988-06-27; source msha-controller-operator-history
- **controller_controls_mine:** B H  Richards → Troesh Recycling, Inc. dba RoXsand; 1985-07-01 to 1988-06-27; source msha-controller-operator-history
- **controller_controls_operator:** B H  Richards → Kolrich Sand & Gravel Company; 1985-07-01 to 1988-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Troesh Ready Mix Inc → Troesh Recycling, Inc. dba RoXsand; 1988-06-28 to 2006-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Troesh → Troesh Recycling, Inc. dba RoXsand; 1988-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Troesh → Troesh Ready Mix Inc; 1988-06-28 to 2006-03-23; source msha-controller-operator-history
- **operator_operates_mine:** RoXsand → Troesh Recycling, Inc. dba RoXsand; 2006-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rene  Troesh et al → Troesh Recycling, Inc. dba RoXsand; 2006-03-24 to 2014-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Rene  Troesh et al → RoXsand; 2006-03-24 to 2014-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Troesh et al → RoXsand; 2006-03-24 to 2014-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Debralee  Coleman et al → Troesh Recycling, Inc. dba RoXsand; 2014-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Debralee  Coleman et al → RoXsand; 2014-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elijah  Coleman et al → RoXsand; 2014-09-02 to current/open; source msha-controller-operator-history