100th Avenue Bridge[Map] Stringer bridge over West Branch Little Sioux River on 100th Avenue Open to traffic Built 1910
110th Street Bridge[Map] Pony truss bridge over Little Sioux River on 110th Street Open to traffic Built ca. 1910; replaced by the current structure brought up from 180th Street 1999
110th Street Bridge (Old)[Map] Lost pony truss bridge over Little Sioux River on 110th Street No longer exists Rehabilitated 1959; replaced 1999 with a bridge brought in from the 180th Street Crossing (See 110th Street Bridge)
180th Street Bridge[Map] Pony truss bridge over Little Sioux River on 180th Street Open to traffic Built ca. 1920; rehabilitated 2001
Calumet Street Bridge[Map] Pony truss bridge over an unnamed creek on Calumet Street Replaced by an arch culvert in 1998 Built ca. 1910; rehabilitated 1940; replaced in 1998
Great Lake Spine Trail - Lake Okoboji Bridge[Map · Street View] Deck plate girder bridge over Strait between East and West Lake Oboji on formerly a railroad line between Spirit Lake and Milford, now a bike trail in Okoboji Open to pedestrians Built 1884 as a swing bridge, swing span became fixed span ca. 1920, became part of the bike trail network in 1995 linking Milford and Spirit Lake
Lakeshore Drive Bridge #1[Map] Lost Stringer bridge over Unnamed creek on Lakeside Avenue Replaced by new bridge Built 1915; Replaced in 2008
Lakeshore Drive Bridge #2 (Old)[Map] Queenpost pony truss bridge over West Branch Canal on Lakeshore Drive in Wahpeton Replaced by a closed spandrel concrete arch bridge Built 1896; rehabilitated 1985; Replaced in 2008
Little Sioux River Bridge[Map] Lost pony truss bridge over Little Sioux River on 120th Street No longer exists Built ca. 1910; replaced 1999
Okoboji Bridge[Map] Pony truss bridge over a branch of Little Sioux River on 180th Avenue Bridge is privately owned by Parks Marina in Okoboji, awaiting re-erection over a pond on the grounds Built in 1909 over the strait between West and East Okoboji Lakes, replaced in 1926 but the truss span was relocated to its present spot.
Okoboji Bridge[Map] Canitlevered Concrete deck girder bridge over Okoboji Lake on US 71 & IA 9 in Okoboji Open to traffic Built 1929; rehabilitated 1979 and 1997; Previous structure was a pony truss bridge and before that, a series of wooden swing spans.
Okoboji Swing Bridge[Map] Lost Timber stringer bridge over Okoboji Lake on Okoboji Road Replaced by a new bridge Built 1883; Replaced 1909
Orleans Bridge[Map · Street View] Bowstring pony truss bridge over the outlet below Spirit Lake on the Iowa Great Lakes Bike Trail at Orleans Open to pedestrians and bicyclists only Originally located near New Hampton; relocated here in 1995
Sandbar Slough Crossing (New)[Map · Street View] Closed-spandrel arch bridge over Sandbar Slough east of Big Spirit Lake on M 56 (270th Ave.) in Orleans Open to traffic Built in 2001 replacing a bridge built in the 1940s to bypass the Old Sandbar Slough Crossing
West Lake Okoboji Outlet Bridge[Map] Concrete culvert bridge over West Lake Okoboji Outlet on Harpen Street Open to traffic Built 1998 replacing a riveted Warren pony truss bridge (see Calumet Street Bridge page)