The spur crosses the canal just upstream from its mouth .
At Portage Avenue south of the Soo Locks. , BS I - 75 turns southeasterly to follow Portage Avenue along the St. Marys River .
The spur crosses the canal just upstream from BS I - 75 's mouth .
At Portage Avenue south of the Soo Locks. , BS I - 75 turns southeasterly to follow Portage Avenue along the St. Marys River .