Boone County, IL
111 public highway bridges
Boone County Bridge Snapshot
Boone County, Illinois contains 111 public highway bridges in the FHWA National Bridge Inventory. Roughly 45% are rated “Good,” 31.5% “Fair,” 6.3% “Poor,” and 6.3% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.
Inspections in IL are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Condition Distribution
All Bridges (111)
US 20 EB
UnknownOver: I-90
.11 MI E WHEELER RD, Boone, IL
US 20 EB
UnknownOver: S APPLETON RD
SW EDGE BELVIDERE, Boone, IL
US 20 WB
UnknownOver: S APPLETON RD
SW EDGE BELVIDERE, Boone, IL
UP RR
UnknownOver: US 20 BR
E EDGE OF BELVIDERE, Boone, IL
POPLAR GROVE RD
UnknownOver: US 20 BR
NE OF BELVIDERE, Boone, IL
US 20 WB
UnknownOver: I-90
.13 MI E WHEELER RD, Boone, IL
UP RR
UnknownOver: I-90
1 MI E WINN CO, Boone, IL
GENOA RD- FAS 37
UnknownOver: I 90
.6 MI S OF US 20, Boone, IL
JOHNSON RD
UnknownOver: I 90
.5 MI S CHRYSLER DR, Boone, IL
SHATTUCK RD
UnknownOver: I 90
2.5 MI W MCHENRY CO, Boone, IL
COUNTY LINE RD
UnknownOver: I 90
MC HENRY CO LINE, Boone, IL
IRENE RD
UnknownOver: I 90
.5 MI S US 20, Boone, IL
STONE QUARRY RD
UnknownOver: I 90
.5 MI S US 20, Boone, IL
TOWNHALL RD
UnknownOver: I 90
2 MI E OF US 20, Boone, IL
PEARL ST
UnknownOver: I 90
4 MI E OF US 20, Boone, IL
SPRING CENTER RD
UnknownOver: I 90
3 MI W MCHENRY CO, Boone, IL
TRIPP RD
UnknownOver: I-90
.5 MI S OF US 20, Boone, IL
Garden Prairie Roa
UnknownOver: I-90
1 Mi W. of Co. Line, Boone, IL
Belvidere Oasis
UnknownOver: I-90
4.4 Mi E of US20, Boone, IL
SQUAW PRAIRIE RD
FairOver: BEAVER CREEK
2.5 MI NW BELVIDERE, Boone, IL
WOODSTOCK RD
FairOver: PISCASAW CREEK
.6 MI E POPLAR GR RD, Boone, IL
RUSSELLVILLE RD
FairOver: PISCASAW BRANCH
5.0 MI SE POPLAR GR, Boone, IL
MARENGO RD
FairOver: PISCASAW CREEK
1.5 MI NE BELVIDERE, Boone, IL
DAWSON LAKE RD
FairOver: BRANCH OF BEAVER CR
5.0 MI N BELVIDERE, Boone, IL
BERGEN RD
FairOver: N KINNIKINNICK CREEK
7.5 MI NW POPLAR GRV, Boone, IL
N BOONE SCHOOL RD
FairOver: S. KINNIKINNICK CRK.
3.0 MI N CALEDONIA, Boone, IL
SHATTUCK RD
FairOver: MOSQUITO CREEK
3.0 MI E BELVIDERE, Boone, IL
GUSTAFSON RD
FairOver: BEAVER CREEK
3.5 MI NW BELVIDERE, Boone, IL
S. APPLETON ROAD
FairOver: KISHWAUKEE RIVER
S OF LINCOLN AVE, Boone, IL
ILL ROUTE 173
FairOver: BEAVER CR TRIBUTARY
1.5 MI W CAPRON, Boone, IL
IL 76
FairOver: DRAINAGE DITCH
0.8 MI. N.OF BUS 20, Boone, IL
NEWBURG RD
FairOver: KISHWAUKEE RIVER
3.5 MI W OF BELVIDER, Boone, IL
MCCURRY RD
FairOver: N KINNIKINNICK CREEK
5.5 MI NE ROSCOE, Boone, IL
N BOONE SCHOOL RD
FairOver: BEAVER CREEK
2.5 MI NW CAPRON, Boone, IL
RUSSELLVILLE ROAD
FairOver: PISCASAW CREEK
1.5 M SE POPLAR GROV, Boone, IL
CAPRON RD
FairOver: BR PISCASAW CREEK
3.5 MI S CAPRON, Boone, IL
BEAVERTON ROAD
FairOver: BEAVER CREEK
1.0 M E POPLAR GROVE, Boone, IL
EPWORTH RD
FairOver: KISHWAUKEERIVER
3.MI E OF BELVIDERE, Boone, IL
RIVERSIDE ROAD
FairOver: BEAVER CREEK
4.0 MI NW BELVIDERE, Boone, IL
SPRING CREEK RD
FairOver: BEAVER CREEK
4 MI NW OF BELVIDERE, Boone, IL
WHEELER RD
FairOver: CN RR
2 MI N DEKALB CO LN, Boone, IL
IL 173
FairOver: BEAVER CREEK
0.5 MI. SW. CAPRON, Boone, IL
US 20
FairOver: COON CREEK
2 MI. E. BELVIDERE, Boone, IL
HUBER ROAD
FairOver: MOSQUITO CREEK
3.5 MI SE BELVIDERE, Boone, IL
IL 173
FairOver: BEAVER CREEK
2.0 MI E POPLAR GROV, Boone, IL
SQUAW PRAIRIE RD
FairOver: PISCASAW CREEK
2.0 MI NE BELVIDERE, Boone, IL
US 20 BR
FairOver: BEAVER CREEK
2.5 MI W BELVIDERE, Boone, IL
US 20 BR
FairOver: TRIB. OF BEAVER CR.
.1 MI E. WINN. CO LN, Boone, IL
MAIN ST
FairOver: KISHWAUKEE RIVER
S OF LINCOLN AVE, Boone, IL
US BR 20
FairOver: KISHWAUKEE RIVER
E EDGE OF BELVIDERE, Boone, IL
Read our methodology — how this data is sourced, computed, and verified.
Related
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |