# Relationship history for MSHA mine 3003615

Current hierarchy: **John (Roddy)  Rice → Vermont Multicolor Slate Quarries → Dekalb**

- 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:** Yvonne M  Pratt et al → Dekalb; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ritchie Bros Slate Company Inc → Dekalb; 2007-11-01 to 2009-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Yvonne M  Pratt et al → Ritchie Bros Slate Company Inc; 2007-11-01 to 2009-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Mohawk Red International Slate Co Inc → Dekalb; 2009-10-03 to 2014-07-22; source msha-controller-operator-history
- **controller_controls_mine:** William J  Enny → Dekalb; 2009-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William J  Enny → Mohawk Red International Slate Co Inc; 2009-10-03 to 2014-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Vermont Multicolor Slate Quarries → Dekalb; 2014-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William J  Enny → Dekalb; 2014-07-23 to 2016-09-28; source msha-controller-operator-history
- **controller_controls_operator:** William J  Enny → Vermont Multicolor Slate Quarries; 2014-07-23 to 2016-09-28; source msha-controller-operator-history
- **controller_controls_mine:** John (Roddy)  Rice → Dekalb; 2016-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John (Roddy)  Rice → Vermont Multicolor Slate Quarries; 2016-09-29 to current/open; source msha-controller-operator-history