by Shipwreck World

Year Built


Year Sank



175 ft (53.3 m)

Difficulty Level



Wreck Location

On the Granite State Shoals in the American Narrows of the seaway and across the channel from the Rock Island Light.
~ GPS Shipwreck Location ~
Latitude:   44° 17' 0.4812" N      Longitude:   -76° 0' 57.1788" W


The steamer Oconto was on her first trip carrying a cargo of silks, cotton, boots and 15 passengers.  She struck Granite State shoal in July of 1886.   There was an unsuccessful salvage attempt and the Oconto slide down the steep side of the channel and eventually broke in two.


2 Comments & Ratings

anonymous by Stewart Hood on 7/27/2015

Can anyone tell me who the Steamer Oconto was named after? There is a girl's camp north of Kingston named Oconto..what's the connection?
Stewart Hood Trenton camper grandfather

anonymous by Tom R on 2/24/2016

The Oconto was a steamer in the Goodrich Line, built in Manitowc WI and named after the northeastern Wisconsin city of Oconto. Almost all of the Goodrich steamers carry Wisconsin city names.

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