Big Slough Creek Bridge Pony truss bridge over Big Slough Creek on CR 90, 0.3 mi. south and 2.2 mi. west of Oskaloosa Open to traffic Built 1905
Big Slough Creek Bridge Through truss bridge over Big Slough Creek on CR 98, 0.8 mi. north and 0.9 mi. west of Oskaloosa Open to traffic Built ca. 1930; rehabilitated 2000
Branch Crooked Creek Bridge Pony truss bridge over a branch of Crooked Creek on Saline Road, 2.3 mi. south and 3.0 mi. east of Nortonville Closed to all traffic
Branch Delaware River Bridge Pony truss bridge over a branch of Delaware River on CR 206 OS 1, 6.0 mi. north and 6.9 mi. west of Valley Falls Open to traffic Built 1909
Cedar Creek Bridge Rainbow arch bridge over Cedar Creek on K-900 Parks Route at Perry Wildlife Area Open to traffic Built 1928
Crooked Creek Bridge Pony truss bridge over Crooked Creek on CR 175, 2.7 mi. north and 1.3 mi. west of Winchester Open to traffic Built ca. 1910
Crooked Creek Bridge Pony truss bridge over Crooked Creek on CR 182, 3.0 mi. south and 3.0 mi. east of Nortonville Closed to all traffic Built ca. 1910
Crooked Creek Bridge Pony truss bridge over Crooked Creek on Thomas Road, 0.9 mi. south and 4.2 mi. east of Nortonville Open to traffic Built ca. 1910; rehabilitated 1999
Crooked Creek Bridge Through truss bridge over Crooked Creek on CR 202, 4.5 mi. east of Nortonville Open to traffic Built ca. 1910
Delaware River Bridge Pratt through truss bridge over Delaware River on abandoned road (possible an old alignment of K-4 Highway) Closed to all traffic
Elm Creek Bridge Pony truss bridge over Elm Creek on CR 21, 0.4 mi. north and 7.5 mi. west of Perry Open to traffic Built ca. 1930
Half Mound Bridge Lost(?) through truss over Delaware River on FAS 1325 near Half Mound No longer exists Purchased from a company in Nebraska and erected by Jefferson
County in 1935. Replaced by a new bridge in 1983.
Muddy Creek Bridge Pony truss bridge over Muddy Creek, 6.4 mi. south and 0.6 mi. east of Meriden Open to traffic Built ca. 1930
North Cedar Creek Bridge Pony truss bridge over North Cedar Creek on CR 178, 1.4 mi. north and 6.5 mi. west of Valley Fall Open to traffic Built ca. 1910
North Fork Walnut Creek Bridge Lost pony truss bridge over North Fork Walnut Creek on Jackson Road, 4.4 mi. north and 2.0 mi. east of Valley Falls No longer exists Built ca. 1910; replaced 2003
Old Jefferson Town Bowstring Bridge Bowstring pony truss bridge over Unnamed creek Open to pedestrians Relocated to Old Jefferson Town in Oskaloosa, Kansas. Added to the National Register of Historic Places in 1990.
Old Jefferson Town Bowstring Bridge Bowstring pony truss bridge over Unnamed creek Open to pedestrians Built by the King Iron Bridge & Mfg Co. of Cleveland, Ohio. Relocated to Old Jefferson Town in Oskaloosa, Kansas. Added to the National Register of Historic Places in 1990.
Perry Bridge Through truss bridge over Delaware River on Bridge Street (Old US 24) just west of Perry in Perry Open to two-lane traffic Built 1926 by the Midland Bridge Co.
Perry Railroad Bridge Two-span skewed through truss railroad bridge over the Delaware River just west of Perry Open to two-track railroad traffic
Rock Creek Bridge Lost pony truss bridge over Rock Creek on 122nd Road No longer exists Replaced 2003
Rock Creek Bridge Rainbow arch bridge over Rock Creek Open to traffic Built 1926
Slough Creek Bridge Pony truss bridge over Slough Creek on McCall Drive, 1.9 mi. north of Oskaloosa Open to traffic Built 1923
Wild Horse Creek Bridge Pony truss bridge over Wild Horse Creek on CR 39, 3.0 mi. north and 0.8 mi. east of Perry Open to traffic Built ca. 1920