# Relationship history for MSHA mine 4300737

Current hierarchy: **David C Camara → Camara Slate Products Inc. → Little Seagreen 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:** David C Camara et al → Little Seagreen Quarry; 1991-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Ferguson → Little Seagreen Quarry; 1997-05-13 to 2016-09-28; source msha-controller-operator-history
- **operator_operates_mine:** Phillip Tatko Slate → Little Seagreen Quarry; 2012-03-23 to 2014-05-06; source msha-controller-operator-history
- **controller_controls_mine:** Phillip J.  Tatko → Little Seagreen Quarry; 2012-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phillip J.  Tatko → Phillip Tatko Slate; 2012-03-23 to 2014-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Scott Johnson Slate → Little Seagreen Quarry; 2014-05-07 to 2015-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Johnson → Little Seagreen Quarry; 2014-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Johnson → Scott Johnson Slate; 2014-05-07 to 2015-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Jeff Ferguson Slate → Little Seagreen Quarry; 2015-03-09 to 2016-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Ferguson → Jeff Ferguson Slate; 2015-03-09 to 2016-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Ely Slate → Little Seagreen Quarry; 2016-03-23 to 2019-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Eric S  Ely → Little Seagreen Quarry; 2016-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric S  Ely → Ely Slate; 2016-03-23 to 2019-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Camara Slate Products Inc. → Little Seagreen Quarry; 2019-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C Camara et al → Camara Slate Products Inc.; 2019-02-06 to current/open; source msha-controller-operator-history