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Every bridge in Boone County, Illinois

Name: Every bridge in Boone County, Illinois
Creator: Bridge Report Card
License: https://creativecommons.org/publicdomain/zero/1.0/

109 inventoried bridges, busiest first

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

Boone County, Illinois, has 109 bridges in the 2025 National Bridge Inventory: 45 rated good, 53 fair, and 11 poor (as of August 20, 2026).
This index lists every one of them, busiest first; each links to its own condition record.

Bridge	Built	Vehicles/day	Condition
I 90 over Stream	2014	51,100	Fair
I 90 EB over Mosquito Ckr	2013	28,000	Good
I 90 WB over Mosquito Crk	2013	28,000	Fair
I-90 over Stream	1958	28,000	Good
I-90 over Stream	1958	25,700	Fair
I-90 over Stream	1958	25,550	Good
US 20 EB over I-90	1964	14,200	Fair
US 20 WB over I-90	1958	14,200	Fair
US 20 WB over S Appleton Rd	1966	13,700	Fair
US 20 Br over Beaver Creek	1957	13,400	Fair
US 20 Br over Trib. of Beaver CR.	1989	13,400	Fair
US 20 EB over S Appleton Rd	1966	13,100	Fair
S. Appleton Road over Kishwaukee River	1964	11,700	Poor
S. Appleton Road over Kishwaukee River	1964	11,700	Fair
US Br 20 over Kishwaukee River	1986	11,100	Fair
Il 76 over Drainage Ditch	1994	10,300	Fair
State Street over Kishwaukee River	2001	8,800	Good
US 20 over Coon Creek	1996	8,550	Fair
Il 76 over Beaver Creek	1990	8,250	Fair
Newburg Rd over Kishwaukee River	1962	8,050	Fair
Il 173 over Willow Creek	1994	6,250	Good
Il 173 over Piscasaw Creektrib.	2001	5,000	Good
Town Hall Road over Unnamed Stream	2010	4,950	Good
Il Rte 173 over Creek	2015	4,850	Good
Il 173 over Beaver Creek	2008	4,550	Fair
Il 173 over Beaver Creek	1994	4,550	Fair
Ill Route 173 over Beaver CR Tributary	1974	4,550	Fair
Spring Creek Rd over Beaver Creek	1993	4,300	Fair
Main St over Kishwaukee River	1972	4,150	Fair
Il 173 over Br. Beaver Creek	2000	4,100	Good
Beloit Rd over Beaver Creek	1978	3,800	Good
Poplar Grove Rd over US 20 Br	1986	3,600	Fair
Caledonia Rd over Beaver Creek	2003	3,350	Good
Irene Rd over Unnamed Crk	1900	3,200	Good
Garden Prairie over Kishwaukee River	2015	2,850	Fair
Poplar Grove Creek over Beaver Creek	2023	2,550	Good
Riverside Road over Beaver Creek	1988	2,350	Fair
Riverside Road over Br of Beaver CR	2007	2,350	Good
Marengo Rd over Piscasaw Creek	1965	2,200	Fair
Poplar Grove Rd over Kishwaukee River	2020	2,200	Good
Hunter Road (fas 3 over Br of S Kinnikinnick	1975	2,150	Fair
Lawrenceville Road over Piscasaw Creek	1974	2,050	Poor
Marengo Rd (tr 77) over Mud Creek	1994	2,000	Fair
Woodstock Rd over Piscasaw Creek	1957	1,800	Fair
Dawson Lake Rd over Branch of Beaver CR	1958	1,750	Fair
Irene Rd over I 90	2013	1,650	Good
Irene Rd over Unnamed Creek	2007	1,650	Good
Orth Rd over Beaver Creek	2014	1,650	Fair
Orth Road over Br of Beaver Creek	2009	1,650	Fair
Squaw Prairie Rd over Beaver Creek	1959	1,650	Fair
Fas-39 (hunter Rd) over Beaver Creek	2011	1,550	Good
Stone Quarry Rd over Hackey Creek	1945	1,550	Poor
Stone Quarry Rd over I 90	2013	1,550	Fair
Wheeler Rd over Branch of Kishwaukee	1959	1,450	Good
Lawrenceville Rd over Mud Creek	2000	1,400	Fair
Poplar Grove Rd over Br. of Beaver Creek	1998	1,350	Good
Squaw Prairie Rd over Piscasaw Creek	1978	1,350	Fair
Caledonia Road over S. Kinnikinnick CR.	1995	1,000	Good
Shattuck Rd over Mosquito Creek	1958	750	Fair
Edson Road over Beaver CR	1973	700	Poor
Russellville Rd over Piscasaw Branch	1960	700	Fair
County Line Rd over Mud Creek	1959	675	Poor
Pearl St over I 90	2014	650	Good
Russellville Road over Piscasaw Creek	1980	650	Fair
County Line Rd over Br Piscasaw Creek	2004	600	Fair
Bloods Point Road over Cn RR	1991	550	Fair
Pearl Street Rd over Kingsbury Creek	1999	500	Good
Garden Prairie Rd over Coon Creek	2005	475	Fair
Townhall Rd over I 90	2014	475	Good
Epworth Rd over Kishwaukeeriver	1985	450	Fair
Beaverton Road over Beaver Creek	1983	375	Fair
Shattuck Rd over I 90	2014	350	Good
Carlson Rd over Spring Creek	1984	325	Fair
Denny Rd over Geryline CR	2021	300	Good
Tripp Rd over I-90	2016	300	Good
County Line Rd over I 90	2014	250	Fair
Crawford Road over Spring Creek	1977	250	Fair
Rockton Rd over N Kinnikinnick Creek	1973	250	Good
County Line Rd over Br Piscasaw Creek	1968	225	Good
Free Church Road over N Kinnikinnick Creek	1973	200	Good
N Boone School Rd over Beaver Creek	1957	200	Fair
Reeds Crossing Roa over Mosquito Creek	1983	200	Good
Wheeler Rd over Cn RR	1998	200	Poor
Garden Prairie Rd over Spring Creek	1958	175	Fair
Capron Rd over Br Piscasaw Creek	1981	150	Poor
Capron Rd over Piscasaw Creek	1958	150	Poor
Centerville Rd over Beaver Creek	2013	150	Good
Garden Prairie Roa over I-90	2015	150	Fair
Huber Road over Mosquito Creek	1977	150	Poor
Johnson Rd over I 90	2014	150	Good
Mccurry Rd over N Kinnikinnick Creek	1967	150	Fair
Gustafson Rd over Beaver Creek	1958	125	Fair
Mill Rd over Piscasaw Creek	1975	125	Poor
County Line Rd over Spring Creek	2016	100	Good
N Boone School Rd over S. Kinnikinnick Crk.	1965	100	Fair
N Boone School Rd over S. Kinnikinnick Crk.	1965	100	Good
N Boone School Rd over S. Kinnikinnick Crk.	1965	100	Good
Townline Rd over Br N Kinninnick CR	1960	100	Good
Spring Center Rd over I 90	2016	75	Good
Blaine Rd over Beaver Creek	2018	50	Good
Blaine Rd over Branch Beaver Creek	1972	50	Good
Denny Road over Piscasaw Creek	1977	50	Poor
Grade School Road over N Kinnikinnick Creek	1973	50	Good
Grange Hall Rd over E Br Piscasaw CR	1986	50	Good
Livingston School over South Kinnikinnick C	2021	50	Good
Fruit Farm Road over Mosquito Creek	1982	25	Good
Bergen Rd over N Kinnikinnick Creek	1989	10	Fair
Leroy Center Rd over Beaver Creek	1968	10	Fair
Genoa Rd- Fas 37 over I 90	2014	–	Good

Source: FHWA National Bridge Inventory, 2025.

Boone County bridge conditions · Illinois bridges by county.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.