Well there are two break walls.
The one in Black Rock was built before the Erie Canal in an attempt by the then city of Black Rock to be the western terimus for the canal.
The second break wall is south and when constructed, part of the town of West Seneca.
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In addition to the settlement at Limestone Hill another settlement was developed by the Wood Harmon Company, land developers from Boston, Massachusetts. Their development in the nineties was called "Roland." The rest of the area was undeveloped or in small farms. Politically it was part of the town of West Seneca. On the lake shore was an area called Stony Point. After 1870 several railroads were built through the town. Limestone Hill was located on the Buffalo, Rochester and Pittsburgh Railroad, the Erie Railroad, the Lake Shore Railroad and the Nickel Plate Railroads. The movement of freight from the west through congested areas in the City of Buffalo was so slow that these railroad companies decided to establish freight yards in West Seneca. This vast railroad facility and terminal yards furnished a great deal of employment thus encouraging settlement in the area. Another important development, vitally affecting the growing district of West Seneca was the erection by the Federal Government, at the close of the century, of a long breakwall at the eastern end of Lake Erie. The southern arm of this breakwall, 7,500 feet in length, extended to Stony Point in West Seneca and made the lake shore an ideal spot for industry."
At least that is what I could find in google.