# Relationship history for MSHA mine 4801709

Current hierarchy: **William Edward  Russell → Russell Construction Company → Douglas Quarry**

- 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

- **controller_controls_mine:** L Dent  Huxtable  et al → Douglas Quarry; 2006-10-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cadlrock Mine → Douglas Quarry; 2007-07-10 to 2010-08-03; source msha-controller-operator-history
- **controller_controls_operator:** L Dent  Huxtable  et al → Cadlrock Mine; 2007-07-10 to 2010-08-03; source msha-controller-operator-history
- **controller_controls_operator:** James N  Huxtable  et al → Cadlrock Mine; 2007-07-10 to 2010-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Pinnacle Materials, Inc. → Douglas Quarry; 2010-08-04 to 2012-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Matthew Ward  Hanna → Douglas Quarry; 2010-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew Ward  Hanna → Pinnacle Materials, Inc.; 2010-08-04 to 2012-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Matthew Ward  Hanna → Douglas Quarry; 2012-04-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pinnacle Materials LLC → Douglas Quarry; 2012-05-04 to 2014-09-21; source msha-controller-operator-history
- **controller_controls_operator:** Matthew Ward  Hanna → Pinnacle Materials LLC; 2012-05-04 to 2014-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Russell Construction Company → Douglas Quarry; 2014-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William Edward  Russell → Douglas Quarry; 2014-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William Edward  Russell → Russell Construction Company; 2014-09-22 to current/open; source msha-controller-operator-history