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Bridge conditions in Dane County, Wisconsin

593 inventoried bridges · 42 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

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 August 20, 2026.
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.

Every bridge in Dane County → - all 593, busiest first, each with its own condition record.

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.