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Bridge conditions in Hancock County, Illinois

290 inventoried bridges · 63 rated poor · 2025 National Bridge Inventory

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

Hancock County has 63 bridges rated poor out of 290 inventoried, a 21.7% share that puts it well above the national rate of about 7%.

63 of the 290 bridges in Hancock County, Illinois, are rated in poor condition (21.7%) in the 2025 National Bridge Inventory, as of August 20, 2026.
122 bridges (42.1%) are rated good and 105 (36.2%) fair.
The median Hancock County bridge was built in 1983.
The busiest poor-rated bridge is Fap 685 Ill 9 over Mississippi River (built 1927), carrying about 2,500 vehicles a day.

Good 42.1% · Fair 36.2% · Poor 21.7% of 290 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
Fap 685 Ill 9 over Mississippi River	1927	2,500	Poor
Fas 1600 over Railroad Creek	1960	2,300	Poor
Il 9 over Ditch	1928	950	Poor
Fas-428 (ch-11) over Bear Creek	1952	500	Poor
Fas 424 over Camp Creek	1968	450	Poor
Co. Hwy. 12 over Petit Creek	1979	350	Poor
Ch 20 over Williams Creek	1972	325	Poor
Fas 1425 over Big Meadow Ditch	1961	325	Poor
Co Hwy 17 over La Harpe Creek	1949	225	Poor
Tr 72 over Little Bear Creek	1965	225	Poor
Fas 431 over Mud Creek	1959	200	Poor
Tr 46 over Chaney Creek	1956	200	Poor
Tr 84 over Little Bear Creek	1972	175	Poor
Tr 154 over Grove Creek	1965	150	Poor
2ND Street over Railroad Creek	1974	150	Poor
Middle Rd over Drainage Ditch	1904	150	Poor
4TH St/ms 1020 over Spilling Creek	1900	150	Poor
Tr No 244 over Brhof Spring Creek	1977	125	Poor
Tr 244 over Spring Creek	1983	125	Poor
Ms 1160 over Drainage Ditch	1920	125	Poor
Co. Hwy. 3 over Little Creek	1966	100	Poor
Co Hwy 31 over Middle Creek	1970	100	Poor
Tr 163 over La Moine River	1980	100	Poor
Tr 166 over Camp Creek	1923	100	Poor
Tr 7 over Camp Creek	1962	100	Poor
Tr 266 over La Moine River	1915	100	Poor
Tr 225 over West Fork Bear CR	1981	100	Poor
Tr 211 over Prairie Creek	1976	75	Poor
Tr 229 over Middle Creek	1961	75	Poor
Tr 71 over Tilton Creek	1928	75	Poor
Tr 344 over Little Creek	1974	75	Poor
Tr 91 over Grove Creek	1966	75	Poor
Tr 2 over Drainage Ditch	1974	75	Poor
Tr 93 over N Fk of Riley Crek	1974	75	Poor
Co Hwy 28 over Middle Creek	1980	50	Poor
Tr 278 over Flour Creek	1963	50	Poor
Tr 306 over Flour Creek	1969	50	Poor
Tr 90 over Fk of Little Bear CR	1977	50	Poor
Tr 57 over Branch of Camp Creek	1925	50	Poor
Tr 186 over Branch of Tilton CR.	1919	50	Poor
Tr 27 over Branch of Spring CR.	1950	50	Poor
Tr 99 over La Harpe	1974	50	Poor
Tr 302 over Cedar Creek	1979	50	Poor
Tr 221 over E Fk of Lamoine R.	1981	50	Poor
Tr 239A over Middle Creek	1917	50	Poor
Tr 226 over Trib of Spring CR	1919	50	Poor
Tr 290 over Spring Creek	1911	50	Poor
Tr 400 over La Moine River	1967	50	Poor
Tr 224A over Short Creek	1908	50	Poor
Tr I16 over W Fk of Bear Creek	1969	50	Poor
Tr 166 over Grove Creek	1961	50	Poor
Tr 104 over Panther Creek	1968	50	Poor
Tr 46 over Riley Creek	1971	50	Poor
Tr 123 over N Branch of Larry Ck	1960	50	Poor
Tr 243 over Trib of W Fk Bear CR	1999	50	Poor
Tr 327 over Little Bear Creek	1976	50	Poor
Tr 306 over Williams Creek	1969	25	Poor
Tr 198A over Slater Creek	1963	25	Poor
Tr 361 over Panther Creek	1982	25	Poor
Tr 39 over Branch of Tilton CR.	1914	25	Poor
Tr 228 over Trib of Bronson CR	1909	25	Poor
Fas 1425 over Rock Creek	1988	20	Poor
Tr 180 over Short Creek	1917	20	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
US 136 over Hamilton Slough	1954	10,500	Good
US 136 over Miss R/1ST/KEOKUK Jct RR	1985	10,500	Fair
Il 336 over Trib to Praire CR	2006	4,200	Good
Il 94 (NB) over Slater Creek	2003	4,050	Fair
Il 94 (SB) over Slater Creek	2002	4,050	Fair
US 136 over Il 336	2006	4,000	Good
US 136 WB over Prairie Creek	2007	4,000	Good
US 136 EB over Prairie Creek	2007	4,000	Good
US136/336 over Trib to Prarie CR	2007	4,000	Good
Il 94 over Long Creek	1984	3,750	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 Hancock County → - all 290, busiest first, each with its own condition record.

All of Illinois: Illinois 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.