# Relationship history for MSHA mine 4503681

Current hierarchy: **Rick  Scarsella; Robert  Scarsella → Scarsella Bros Inc. → Casey's 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:** Frank  Scarsella et al → Casey's Quarry; 2000-05-01 to 2015-12-18; source msha-controller-operator-history
- **operator_operates_mine:** L B & R Logging & Gravel → Casey's Quarry; 2010-04-05 to 2018-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Hornbeck → Casey's Quarry; 2010-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Hornbeck → L B & R Logging & Gravel; 2010-04-05 to 2018-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Scarsella et al → Casey's Quarry; 2015-12-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Casey's Quarry → Casey's Quarry; 2018-01-11 to 2025-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Lincoln L  Torgerson → Casey's Quarry; 2018-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lincoln L  Torgerson → Casey's Quarry; 2018-01-11 to 2025-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Scarsella Bros Inc. → Casey's Quarry; 2025-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Scarsella et al → Scarsella Bros Inc.; 2025-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Scarsella et al → Scarsella Bros Inc.; 2025-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Scarsella et al → Scarsella Bros Inc.; 2025-05-01 to 2015-12-18; source msha-controller-operator-history