# Relationship history for MSHA mine 4607277

Current hierarchy: **James L  Laurita Jr; Thomas A  Laurita → Dana Mining Company Inc → Birds Creek**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Cresent Development Company Inc → Birds Creek; 1987-04-01 to 1991-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Mc Nay John → Birds Creek; 1987-04-01 to 1991-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Mc Nay John → Cresent Development Company Inc; 1987-04-01 to 1991-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Dana Mining Company Inc → Birds Creek; 1991-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas A  Laurita  et al → Birds Creek; 1991-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas A  Laurita  et al → Dana Mining Company Inc; 1991-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James L  Laurita Jr  et al → Dana Mining Company Inc; 1991-01-15 to current/open; source msha-controller-operator-history