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Bridge conditions in Lake County, Indiana

501 inventoried bridges · 36 rated poor · 2025 National Bridge Inventory

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

Lake County tracks close to typical: 36 of its 501 inventoried bridges (7.2%) are rated poor, against a national rate of about 7%.

36 of the 501 bridges in Lake County, Indiana, are rated in poor condition (7.2%) in the 2025 National Bridge Inventory, as of August 20, 2026.
249 bridges (49.7%) are rated good and 216 (43.1%) fair.
The median Lake County bridge was built in 1991.
The busiest poor-rated bridge is Ridge Road over Elgin Joliet Eastern RR. (built 1934), carrying about 24,762 vehicles a day.

Good 49.7% · Fair 43.1% · Poor 7.2% of 501 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
Ridge Road over Elgin Joliet Eastern RR.	1934	24,762	Poor
Kennedy Avenue over Little Calumet River	1955	24,318	Poor
US 6 over Muck Pocket	1941	22,439	Poor
US 6 over Deep River	1941	22,439	Poor
I-65 SB over Brown Ditch	1964	22,124	Poor
I-90 EB over 129TH Street	1956	18,085	Poor
I-90 WB over 129TH Street	1956	18,085	Poor
45TH Street over Hart Ditch	1960	16,906	Poor
Ridge Road over Kennedy Avenue Trail	1936	16,879	Poor
Broad Street over Cady Marsh Ditch	1970	16,840	Poor
Old Lincoln Hwy over Deep River	1992	9,563	Poor
Wisconsin Street over Lake George	1978	8,680	Poor
Casino Center Dr over RR Hammond Marina Dr	1996	6,533	Poor
Buchanan Street over Grand Calumet River	1950	6,343	Poor
213TH Street over Hart Ditch	1955	5,782	Poor
Joliet Street over St John Ditch	1969	5,542	Poor
Colorado Street over Deep River	1969	5,302	Poor
Clark Street over Branch Beaver Dam Ditch	1960	4,369	Poor
Colorado Street over Niles Ditch	1970	4,365	Poor
Parrish Avenue over Branch of Cedar Lake	1969	3,657	Poor
153RD Avenue over Lake Dalecarlia	1955	3,045	Poor
Arizona Street over Deep River	1964	2,141	Poor
Madison Street over Beaver Dam Ditch	1988	1,622	Poor
169TH Avenue over Spring Run Ditch	1969	874	Poor
161ST Avenue over Cedar Creek	1945	762	Poor
241ST Avenue over Fuller Ditch	1960	584	Poor
Oakley Avenue over Cedar Creek	1977	379	Poor
Clay Street over Deep River	1980	320	Poor
South Alley over Cedar Creek	1979	308	Poor
Binyon Street over Cedar Creek	1940	256	Poor
State Line Road over Kankakee River	1900	136	Poor
Mississippi Street over Vannati Ditch	1960	130	Poor
121ST Avenue over Niles Ditch	1977	125	Poor
129TH Avenue over Niles Ditch	1960	5	Poor
Buchanan Str Ramp over Grand Calumet River	1956	–	Poor
I-90 Rampbuchanan over Grand Calumet River	1956	–	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
I-80 WB Ramp to SR over SR 912 Eb/wb Ramps	2001	185,778	Fair
I-80 Ebwb 2 Ramps over Erie-lackawanna Trail	2005	175,670	Fair
I-80 I-94 EB over US 41 N/sr 152 W Rmp 2I	2005	175,670	Fair
I-80i-94 EB over Northcote Ave	2005	172,512	Good
I-80i-94 EB over Hohman Avenue	2007	150,742	Good
I-80i-94 EB over Lt Calumet Riv Monon Tr	2007	150,742	Good
I-80i-94 EB over Harrison Avenue	2007	150,742	Good
I-80 Ebwb over SR 912 Eb/wb Ramps	2001	141,800	Good
I-80 EB over NS RR Cn RR Wye	1953	99,921	Good
I-80 over Little Calumet River	1996	98,335	Good

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of Indiana: Indiana 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.