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    Trelfa number 5-364

    Construction of the first Second Avenue Bridge across the Thunder Bay River in Alpena, Michigan, 1865. Looking northeast.

    Trelfa number 5-150

    The third Second Avenue Bridge across the Thunder Bay River in Alpena, Michigan, c1906.

    The fourth Second Avenue Bridge across the Thunder Bay River in Alpena, Michigan, soon after opening. c1940. Built in 1939. Vessel WYANDOTTE.

    The fourth Second Avenue Bridge across the Thunder Bay River in Alpena, Michigan, c1940. Built in 1939. Vessel WYANDOTTE.

    The fourth Second Avenue Bridge across the Thunder Bay River in Alpena, Michigan. Vessel going upriver is the R. E. MOODY. The MOODY was scrapped in 1958.

    Looking across the Second Avenue Bridge towards downtown Alpena. The wooden bridge is seen in its closed position. To open, it would pivot from the center to run parallel with the river. Vessels coul

    An unknown three-mast schooner is docked at the Butterfield and Crable Mill near Dock Street (North Second Avenue) and the swing bridge in the Thunder Bay River.

    Trelfa number 5-168

    The Alpena Fire Department's sleigh and horse team crossing the Second Avenue Bridge from the north during the winter. The now Alpena Furniture store is in the background.

    In July of 1971, the Alpena Power Company lowered the Thunder Bay River by nine feet. This was done by opening the Ninth Street Dam and closing the Four-Mile Dam. The purpose of this was to allow the

    Chisholm Street looking across the Thunder Bay River. House in center background was called the "Pest House" or "Raven's Craig." People with contagious diseases were quarantined there.

    The sorting gap was where logs were sorted according to owner by reading the mark on the end of each log.