Top Ranked Idaho Bridges

Dover Bridge (Bonner County, Idaho)
Rated 99% with 2 votes
Lost Parker through truss bridge over UP and BNSF railroad tracks on US 2
Replaced by a steel girder bridge in 2011
Built 1937, Replaced 2011
Lucile Bridge (Idaho County, Idaho)
Rated 97% with 2 votes
Through truss bridge over Salmon River on Cow Creek Road
Open to traffic
Built 1937; rehabilitated 1975
Bonners Ferry Bridge (Boundary County, Idaho)
Rated 96% with 3 votes
Lost five-span Parker through truss bridge over Kootenai River on US 95 in Bonners Ferry
Replaced by new bridge
Built 1932-33; rehabilitated 1970; replaced 1984
Trail of the Coeur D' Alenes - South Fork Coeur d'Alene River Bridge (Wallace) (Shoshone County, Idaho)
Rated 95% with 3 votes
Triple-intersection Warren through truss bridge over Coeur d'Alene River on the Trail of the Couer D'Alenes (formerly Union Pacific Railroad)
Open to pedestrians
Built 1902
CSP - Half Moon Trestle (Lewis County, Idaho)
Rated 94% with 3 votes
Timber stringer bridge on Railroad
Intact but closed to all traffic
Built 1907, abandoned 2000
UP - American Falls Bridge (Power County, Idaho)
Rated 90% with 2 votes
Pratt deck truss bridge over Snake River on Union Pacific Railroad (UP)
Open to traffic
Built 1927, Raised and strengthed 1970's
Bernard Pack Suspension Bridge (Valley County, Idaho)
Rated 90% with 2 votes
Wire suspension bridge over Middle Fork Salmon River on pedestrian and pack trail
Open to pedestrian and equestrian activities only
Built 1957
UP - Grace Pegram Truss Bridge (Caribou County, Idaho)
Rated 89% with 2 votes
Pegram through truss bridge over Bear River on Union Pacific Railroad
Derelict/abandoned
Built 1894 at Georgetown, Idaho; relocated here ca. 1913
BNSF - Lake Pend Oreille Bridge (Bonner County, Idaho)
Rated 88% with 2 votes
Bridge over Pend Oreille Lake on Railroad (BNSF)
Open to traffic
"Built by Northern Pacific railroad in 1882"; "Rebuilt for the first time in 1905"; ."Another rebuilt program was done in 2008, when BNSF railway replaced a dozen support wooden piers at the north end."
Post Falls Power Plant Bridge (Kootenai County, Idaho)
Rated 87% with 2 votes
Open-spandrel arch bridge over Spokane River on W 4th Avenue
Open to traffic
Built 1929
Sperry Bridge (Nez Perce County, Idaho)
Rated 85% with 2 votes
Pin-connected Pratt through truss bridge over Potlatch River on Mill Street in Kendrick
Open to traffic
Built 1908
Unity Road Bridge (Washington County, Idaho)
Rated 84% with 2 votes
Through truss bridge over Weiser River on Unity Road
Open to traffic
Built 1910; rehabilitated 2000
Boise River Greenbelt - Boise River Bridge (Ada County, Idaho)
Rated 79% with 3 votes
Pratt through truss bridge over Boise River on the Boise River Greenbelt (Old Railroad Bridge)
Open to pedestrians
Built 1923
Warm River Bridge (Fremont County, Idaho)
Rated 78% with 3 votes
Pratt through truss bridge over Warm River on Road
Open to traffic
CSP - Lawyers Canyon Viaduct (Lewis County, Idaho)
Rated 76% with 2 votes
Deck plate girder bridge over Lawyers Canyon on Railroad
Intact but closed to all traffic
Built 1908, abandoned 2000
Mores Creek Bridge (Ada County, Idaho)
Rated 75% with 2 votes
Steel arch bridge over Mores Creek (Lucky Peak Reservoir) on ID 21
Open to traffic
Built 1953
EIRR - Ririe Bridge (A) (Jefferson County, Idaho)
Rated 72% with 3 votes
Two-span Pegram through truss bridge over Snake River on the Eastern Idaho Railroad - East Belt Branch
Open to traffic
Built 1894 as five-span bridge at Nyssa, Oregon; two-spans relocated here 1914
Railroad Grade Road Bridge (Shoshone County, Idaho)
Rated 72% with 2 votes
Pratt through truss bridge over St. Joe River on Railroad Grade Road
Open to traffic
Built 1908 to carry the Milwaukee Road Pacific Coast Extension in 1908. Railroad abandoned in 1980. Now a public road bridge.
Fun Farm Bridge (Fremont County, Idaho)
Rated 71% with 3 votes
Through truss bridge over Henry's Fork Snake River on Ext
Open to traffic
Built 1925; rehabilitated 1998
Perrine Bridge (Twin Falls County, Idaho)
Rated 71% with 11 votes
Steel arch bridge over Snake River on US 93 at Twin Falls
Open to traffic
Built 1976