# Relationship history for MSHA mine 4503489

Current hierarchy: **Don  Merlino; Gary  Merlino → Kangley Rock & Recycling → Lake Frances Pit**

- 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:** Don  Merlino et al → Lake Frances Pit; 1985-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brien N  DeAtley et al → Lake Frances Pit; 1999-06-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Quality Rock Products Inc → Lake Frances Pit; 2001-08-01 to 2008-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Brien N  DeAtley et al → Quality Rock Products Inc; 2001-08-01 to 2008-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Albert N  DeAtley et al → Quality Rock Products Inc; 2001-08-01 to 2008-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Quality Aggregates, LLC → Lake Frances Pit; 2008-08-18 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Eucon Corporation → Lake Frances Pit; 2008-08-18 to 2012-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Eucon Corporation → Quality Aggregates, LLC; 2008-08-18 to 2012-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Don  Merlino et al → Lake Frances Pit; 2012-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Merlino et al → Quality Aggregates, LLC; 2012-12-28 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Merlino et al → Quality Aggregates, LLC; 2012-12-28 to 2017-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Kangley Rock & Recycling → Lake Frances Pit; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Merlino et al → Kangley Rock & Recycling; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Merlino et al → Kangley Rock & Recycling; 2018-01-01 to current/open; source msha-controller-operator-history