Bridge conditions in Cass County, Iowa
296 inventoried bridges · 104 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Cass County has 104 bridges rated poor out of 296 inventoried, a 35.1% share that puts it well above the national rate of about 7%.
- 104 of the 296 bridges in Cass County, Iowa, are rated in poor condition (35.1%) in the 2025 National Bridge Inventory, as of .
- 80 bridges (27.0%) are rated good and 112 (37.8%) fair.
- The median Cass County bridge was built in 1979.
- The busiest poor-rated bridge is FM - Olive over Nishnabotna River (built 1961), carrying about 1,524 vehicles a day.
Good 27.0% · Fair 37.8% · Poor 35.1% of 296 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| FM - Olive over Nishnabotna River | 1961 | 1,524 | Poor |
| FM - 690TH over Sevenmile Creek | 1971 | 468 | Poor |
| FM - 690TH over Waterway | 1963 | 450 | Poor |
| FM - 690TH over Waterway | 1970 | 450 | Poor |
| Washington St over Drainage to Camp Creek | 1983 | 405 | Poor |
| FM - Lansing over Waterway | 1900 | 379 | Poor |
| FM - 690TH over Jim Creek | 1971 | 329 | Poor |
| Local - 560TH over Creek | 1983 | 269 | Poor |
| FM - 690TH over Troublesome Creek | 1960 | 210 | Poor |
| FM - 690TH over Nodaway River | 1970 | 190 | Poor |
| W 4TH St over Camp Creek | 1976 | 170 | Poor |
| FM - Oxford over Seven Mile Creek | 1974 | 139 | Poor |
| FM - Jackson over Waterway | 1985 | 139 | Poor |
| FM - Boston over Nishnabotna River | 1951 | 131 | Poor |
| Local/buck Crk over East Nishnabotna River | 1900 | 123 | Poor |
| Local - 770TH over Small | 1980 | 91 | Poor |
| Quincy Rd over Waterway | 1975 | 91 | Poor |
| Local/rockport over Waterway | 1900 | 89 | Poor |
| Local - 540TH over Waterway | 1991 | 72 | Poor |
| Local - Nshna V over Small Stream | 1986 | 62 | Poor |
| Local - Hamburg over Turkey Creek | 1974 | 62 | Poor |
| FM - Lansing over Waterway | 1952 | 60 | Poor |
| Local - 740TH over West Nodaway River | 1978 | 51 | Poor |
| Local - 665TH over Creek | 1983 | 51 | Poor |
| FM - Yankton over Waterway | 1958 | 50 | Poor |
| 540TH St over Stream | 1984 | 50 | Poor |
| Local - 540TH over Lone Tree Branch | 1987 | 50 | Poor |
| Local - Yankton over Waterway | 1951 | 46 | Poor |
| Local - 700TH over Waterway | 1967 | 46 | Poor |
| Local - Jasper over Nishnabotna River | 1959 | 46 | Poor |
| FM - 730TH over Elm Creek | 1956 | 45 | Poor |
| FM - Indian Crk over Waterway | 1955 | 45 | Poor |
| Local/victoria over Small | 1959 | 41 | Poor |
| Local - Quincy over West Nodaway River | 1982 | 41 | Poor |
| Local - 665TH over Jim Branch | 1978 | 41 | Poor |
| Local/buck Crk over Waterway | 1967 | 41 | Poor |
| Local/richland over Waterway | 1959 | 40 | Poor |
| Local/richland over Waterway | 1959 | 40 | Poor |
| Local - 765TH over Waterway | 1900 | 35 | Poor |
| Local/keystone over Turkey Creek | 1900 | 35 | Poor |
| Local - Daytona over Buck Creek | 1980 | 35 | Poor |
| FM - Yankton over Nodaway River | 1949 | 34 | Poor |
| FM - 660TH over Jim Creek | 1956 | 34 | Poor |
| Local - Wichita over Three Mile Creek | 1972 | 30 | Poor |
| Local - 570TH over Waterway | 1955 | 30 | Poor |
| Local - Quincy over Waterway | 1967 | 30 | Poor |
| Local - 635TH over Troublesome Creek | 1979 | 30 | Poor |
| Local - 730TH over Waterway | 1958 | 30 | Poor |
| Local - Chicago over Buck Creek | 1900 | 30 | Poor |
| FM - 660TH over Lone Tree Creek | 1900 | 29 | Poor |
| FM - Boston over Crooked Creek | 1950 | 29 | Poor |
| Local - Wichita over Nodaway River | 1988 | 26 | Poor |
| Local - Upland over Waterway | 1983 | 26 | Poor |
| Local/newport over Creek | 1959 | 26 | Poor |
| Local - Quebec over Seven Mile Creek | 1981 | 26 | Poor |
| Local - Nshna V over Indian Creek | 1920 | 26 | Poor |
| Local/keystone over Creek | 1900 | 26 | Poor |
| Local/keystone over Creek | 1981 | 26 | Poor |
| Local - 740TH over Creek | 1900 | 26 | Poor |
| FM - 710TH over Waterway | 1955 | 26 | Poor |
| Local over Waterway | 1955 | 26 | Poor |
| Local/eastland over Buck Creek | 1974 | 26 | Poor |
| Local - 670TH over Lone Tree Branch | 1978 | 21 | Poor |
| Local - Pella over Fox Creek | 1987 | 21 | Poor |
| Local - 700TH over Turkey Creek | 1978 | 21 | Poor |
| Local over Creek | 1997 | 21 | Poor |
| Local - 555TH over Camp Creek | 1976 | 21 | Poor |
| Local over Turkey Creek | 1981 | 21 | Poor |
| Local/fairview over Creek | 1959 | 21 | Poor |
| FM - 710TH over Waterway | 1958 | 20 | Poor |
| FM - Dallas over Troublesome River | 1959 | 20 | Poor |
| Local - Upland over Threemile Creek | 1996 | 15 | Poor |
| Local - Upland over Seven Mile Creek | 1976 | 15 | Poor |
| Local - 620TH over Waterway | 1977 | 15 | Poor |
| Local - 560TH over Waterway | 1900 | 15 | Poor |
| Local - 680TH over Seven Mile Creek | 1979 | 15 | Poor |
| Newport Rd over Bear Branch | 1984 | 15 | Poor |
| Local/keystone over Spring Creek | 1900 | 15 | Poor |
| Local - 640TH over Creek | 1977 | 15 | Poor |
| Local - Chicago over Creek | 1977 | 15 | Poor |
| Local/fairview over Stream | 1979 | 15 | Poor |
| Local - 760TH over Stale Branch | 1986 | 11 | Poor |
| Local - 710TH over W Nodaway | 1977 | 11 | Poor |
| Local - Wichita over Seven Mile Creek | 1978 | 11 | Poor |
| Local - 740TH over Waterway | 1985 | 11 | Poor |
| Local - 760TH over West Nodaway Creek | 1988 | 11 | Poor |
| Local - 710TH over Waterway | 1955 | 11 | Poor |
| Local - 680TH over Waterway | 1976 | 11 | Poor |
| Local - 640TH over Lone Tree Branch | 1987 | 11 | Poor |
| Local - Akron over Small Stream | 1987 | 11 | Poor |
| Akron Rd over Stream | 1978 | 11 | Poor |
| Local - 700TH over Trib Troublesome Creek | 1983 | 11 | Poor |
| Local - 100TH over Creek | 1900 | 11 | Poor |
| Local - Upland over Whistlers Branch | 1983 | 5 | Poor |
| Local - 680TH over Waterway | 1985 | 5 | Poor |
| Local - 660TH over Stream | 1981 | 5 | Poor |
| Local over Clarks Creek | 1966 | 5 | Poor |
| Local - Memphis over Turkey CR | 1900 | 5 | Poor |
| Local - Memphis over Small Stream | 1978 | 5 | Poor |
| Local - 675TH over Creek | 1961 | 5 | Poor |
| Independence Rd over Creek | 2005 | 5 | Poor |
| LOCAL/730TH Ln over Waterway | 1995 | 5 | Poor |
| Local - Akron over Troublesome Creek | 1900 | 5 | Poor |
| Local - 580TH over Little Camp Creek | 1981 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 over Camp Creek | 1965 | 23,500 | Fair |
| I-80 over Drainage Ditch | 1959 | 23,000 | Fair |
| I-80 over Stream | 1965 | 22,400 | Fair |
| I 80 EB over Indian Creek | 2013 | 11,800 | Good |
| I 80 WB over Indian Creek | 2014 | 11,800 | Good |
| EB I-80 over 570TH St | 1966 | 11,750 | Fair |
| WB I-80 over 570TH St | 1966 | 11,750 | Fair |
| EB I-80 over 770TH Street | 1958 | 11,650 | Fair |
| WB I-80 over 770TH Street | 1958 | 11,650 | Fair |
| EB I-80 over Buck Ck & Buck Ck Rd | 1965 | 11,600 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Iowa: Iowa bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.