The road turns west on Turnpike Road as it departs the village, then turns north on Ferrence Road towards the town of Union. At the town line, it has an interchange with I-84 (Exit 72). Route 89 ends about  later at an intersection with Route 190 in the southwest corner of Union.
The road diverges west on Turnpike Road as it exits the village, then shifts north on Ferrence Road toward Union. At the town boundary, it meets I-84 (Exit 72). Route 89 concludes at a junction with Route 190 in the southwest corner of Union.