Bridge conditions in Dane County, Wisconsin
593 inventoried bridges · 42 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 593 bridges in Dane County: 278 rated good, 273 fair, and 42 poor.
- 42 of the 593 bridges in Dane County, Wisconsin, are rated in poor condition (7.1%) in the 2025 National Bridge Inventory, as of .
- 278 bridges (46.9%) are rated good and 273 (46.0%) fair.
- The median Dane County bridge was built in 1994.
- The busiest poor-rated bridge is Cth M / Century Av over Pheasant Branch Creek (built 1956), carrying about 22,500 vehicles a day.
Good 46.9% · Fair 46.0% · Poor 7.1% of 593 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 |
|---|---|---|---|
| Cth M / Century Av over Pheasant Branch Creek | 1956 | 22,500 | Poor |
| Lrd John Nolen Dr over Lake Monona | 1975 | 21,600 | Poor |
| Lrd John Nolen Dr over Lake Monona | 1968 | 21,600 | Poor |
| Lrd John Nolen Dr over Lake Monona | 1966 | 21,600 | Poor |
| Lrd John Nolen Dr over Lake Monona | 1968 | 21,600 | Poor |
| Ih 94 WB over Sth 73 | 1963 | 21,200 | Poor |
| Ih 94 WB over Lrd Missouri Rd | 1963 | 19,150 | Poor |
| Cth M / Century Av over Pheasant Branch Creek | 1949 | 15,700 | Poor |
| Cth N over Little Door Creek | 1954 | 5,800 | Poor |
| Cth Tt over Koshkonong Creek | 1941 | 3,000 | Poor |
| Cth Mn over Door Creek | 1921 | 2,600 | Poor |
| Cth G over Mt Vernon Creek | 1950 | 2,189 | Poor |
| Lrd Hoepker Rd over Ih 90-ih 94 | 1960 | 2,028 | Poor |
| Lrd Femrite Rd over Br Yahara River | 1971 | 1,800 | Poor |
| Cth T over Koshkonong Creek | 1939 | 1,716 | Poor |
| Cth Bb over Koshkonong Creek | 1914 | 1,500 | Poor |
| Cth Pq / Water St over Koshkonong Creek | 1957 | 1,480 | Poor |
| Cth A over Saunders Creek | 1927 | 1,300 | Poor |
| Cth G over W Br Sugar River | 1953 | 1,200 | Poor |
| Cth G over Br W Br Sugar River | 1953 | 1,200 | Poor |
| Cth Kp / Madison S over Vermont Creek | 1951 | 1,055 | Poor |
| Cth Y / State St over Black Earth Creek | 1951 | 950 | Poor |
| Cth H over Pleasant Valley Branch | 1963 | 724 | Poor |
| Cth Tt over Maunesha River | 1961 | 690 | Poor |
| Cth Y over Blums Creek | 1939 | 580 | Poor |
| Cth A over Koshkonong Creek | 1956 | 490 | Poor |
| Lrd Williams Point over Lrd Park Rd | 1967 | 322 | Poor |
| Cth Jj over Vermont Creek | 1958 | 314 | Poor |
| Lrd Tecumseh Ave over Lagoon Du Nord | 1957 | 215 | Poor |
| Lrd Olson Rd over Black Earth Creek | 1978 | 176 | Poor |
| Lrd Reeve Rd over E Br Blue Mounds Creek | 1974 | 176 | Poor |
| Lrd W Ridge Rd over Koshkonong Creek | 1972 | 176 | Poor |
| Cth Jg over Elvers Creek | 1966 | 154 | Poor |
| Lrd Lake Kegonsa R over Badfish Creek | 1941 | 146 | Poor |
| Lrd Capitol View R over Pheasant Branch Creek | 1966 | 117 | Poor |
| Cth Jj over Elvers Creek | 1961 | 105 | Poor |
| Lrd Cherry Lane over Maunesha River | 1989 | 101 | Poor |
| Lrd Bell Brook Rd over Br Story Creek | 1923 | 88 | Poor |
| Lrd Spring Rd over Br Yahara River | 1930 | 58 | Poor |
| Lrd Daentl Rd (dea over Token Creek | 1960 | 50 | Poor |
| Lrd Lewis Rd over W. Branch of Sugar River | 1930 | 50 | Poor |
| Lrd Sutcliffe Rd over E Br Blue Mounds Creek | 1975 | 47 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ush 12/18-w Beltli over Cmstpp RR | 1975 | 131,000 | Good |
| Ush 12/14/18/151 over Lrd Todd Dr | 1971 | 129,000 | Fair |
| Ush 12/18-s Beltli over Drainage Ditch | 1988 | 117,000 | Fair |
| Ih 39/90/94 over Starkweather Creek | 1959 | 109,000 | Fair |
| Ush 12/18 over Br Yahara River | 1962 | 86,700 | Fair |
| Ush 12/18 over Drainage Ditch | 1987 | 86,700 | Fair |
| Ih 90-ih 94 over Token Creek | 1959 | 69,000 | Fair |
| Ush 18/151 Verona over Pedestrian Walkway | 2014 | 67,100 | Good |
| Ush 12/18 Eb-ush 1 over Ush 14/151 | 1951 | 62,500 | Fair |
| Ush 12/18 Eb-w Bel over Wsor | 1952 | 62,500 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Wisconsin: Wisconsin 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.