Bridge conditions in Grant County, Wisconsin
381 inventoried bridges · 16 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Grant County tracks close to typical: 16 of its 381 inventoried bridges (4.2%) are rated poor, against a national rate of about 7%.
- 16 of the 381 bridges in Grant County, Wisconsin, are rated in poor condition (4.2%) in the 2025 National Bridge Inventory, as of .
- 253 bridges (66.4%) are rated good and 112 (29.4%) fair.
- The median Grant County bridge was built in 1989.
- The busiest poor-rated bridge is Cth T over Wisconsin River 03 (built 1958), carrying about 1,200 vehicles a day.
Good 66.4% · Fair 29.4% · Poor 4.2% of 381 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 T over Wisconsin River 03 | 1958 | 1,200 | Poor |
| Cth A over Dry Hollow Creek | 1963 | 830 | Poor |
| Cth O over Platte River | 1956 | 600 | Poor |
| Cth Q over Fennimore Creek | 1984 | 519 | Poor |
| Cth G over Blue River | 1950 | 470 | Poor |
| Cth N (dead End) over Br Mccartney Branch | 1890 | 240 | Poor |
| Lrd Elm Rd over Br Platte River | 1955 | 104 | Poor |
| Lrd Townhall Rd over Crooked Creek | 1900 | 102 | Poor |
| Lrd Neff Rd over Fennimore Creek | 1973 | 102 | Poor |
| Lrd Preston Rd over Cass Valley Branch | 1930 | 102 | Poor |
| Lrd Glassmaker Rd over Rattlesnake Creek | 1968 | 78 | Poor |
| Lrd Big Green Rd over Big Green River | 1919 | 53 | Poor |
| Lrd Sleepy Hollow over Saunders Creek | 1920 | 53 | Poor |
| Lrd Town Line Rd ( over Rogers Branch | 1910 | 50 | Poor |
| Lrd Wills Lane (de over French Creek | 1950 | 50 | Poor |
| Lrd Rattlesnake Rd over Beetown Branch | 1950 | 37 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ush 61/151 Sb-sth over Ush 61/151 NB on Ramp (E | 2015 | 15,500 | Good |
| Ush 61-ush 151 over Mississippi River 01 | 1982 | 12,700 | Fair |
| Ush 151 over Roundtree Branch Creek | 2005 | 9,495 | Good |
| Ush 151 NB over Lrd Mc Adam Rd | 2005 | 8,100 | Good |
| Ush 151 SB over Lrd Mc Adam Rd | 2005 | 8,100 | Good |
| Ush 151 NB over Mcadam Br | 2006 | 8,100 | Good |
| Ush 151 SB over Mcadam Br | 2006 | 8,100 | Good |
| Ush 61/151 Nb-sth over Lrd Sandy Hook Rd | 1988 | 7,750 | Fair |
| Ush 61/151 Sb-sth over Lrd Sandy Hook Rd | 1988 | 7,750 | Fair |
| Ush 61/151 Nb-sth over Cth Hhh | 1993 | 7,500 | Good |
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.