# Relationship history for MSHA mine 4608666

Current hierarchy: **Dale Wade  Moore Jr → Enviroserve Inc → No 1**

- 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:** Enviroserve Inc → No 1; 1997-09-01 to 1999-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Dale Wade  Moore Jr → No 1; 1997-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale Wade  Moore Jr → Enviroserve Inc; 1997-09-01 to 1999-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Parma N  D'Angelo et al → No 1; 1998-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Progressive Excavation Llc → No 1; 1999-04-21 to 2000-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Parma N  D'Angelo et al → Progressive Excavation Llc; 1999-04-21 to 2000-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Vincent F  D'Angelo et al → Progressive Excavation Llc; 1999-04-21 to 2000-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Enviroserve Inc → No 1; 2000-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale Wade  Moore Jr → Enviroserve Inc; 2000-01-21 to current/open; source msha-controller-operator-history