Black Hawk County, IA

411 public highway bridges

Black Hawk County Bridge Snapshot

Black Hawk County, Iowa contains 411 public highway bridges in the FHWA National Bridge Inventory. Roughly 46% are rated “Good,” 28.7% “Fair,” 5.8% “Poor,” and 5.8% 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 IA 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.

411

Total Bridges

46%

Good

5.8%

Poor

5.8%

Structurally Deficient

Condition Distribution

Good

46% (189)

Fair

28.7% (118)

Poor

5.8% (24)

SD

5.8% (24)

All Bridges (411)

Sort:

RIVER FOREST RD

Over: I-380

0.8 MI. S OF S JCT. 218, Black Hawk, IA

Built 1981 ADT: 32,200

MLK JR DR

Over: LANE ST

CITY BRIDGE NO. 52, Black Hawk, IA

Built 1996 ADT: 998

NB US 218

Over: BLACK HAWK CK & RD

0.2 mi. N of Jct. U.S. 63, Black Hawk, IA

Built 1991 ADT: 861

SB US 218

Over: BLACK HAWK CK & RD

0.2 mi. N of Jct. U.S. 63, Black Hawk, IA

Built 1991 ADT: 861

US 218 NB

Over: FLETCHER AVE

0.6 Mi. N of JCT. US 63, Black Hawk, IA

Built 1991 ADT: 2,105

US 218 SB

Over: FLETCHER AVE

0.8 mi. N of Jct U.S. 63, Black Hawk, IA

Built 1991 ADT: 2,105

ANSBOROUGH AVE

Over: US 218

IN WATERLOO, Black Hawk, IA

Built 1991 ADT: 22,200

US 218 SB

Over: SB US 63

At jct. U.S. #63, Black Hawk, IA

Built 1991 ADT: 3,200

SB US 218

Over: NB US 63

3.6 mi. N of US 20, Black Hawk, IA

Built 1991 ADT: 2,700

NB IA 27

Over: IA 57

AT JCT. IA 57 & US 218, Black Hawk, IA

Built 1994 ADT: 9,800

IA 27 SB

Over: IA 57

AT JCT. IA. 57 & US 218, Black Hawk, IA

Built 1994 ADT: 7,800

NB IA 27

Over: SO MAIN ST

.3 mi S of University Ave, Black Hawk, IA

Built 1993 ADT: 3,150

SB IA 27

Over: SO MAIN ST

.3 mi S of University Ave, Black Hawk, IA

Built 1993 ADT: 3,150

IA 27

Over: UNIVERSITY AVE

2.1 MI. S of U.S. 218, Black Hawk, IA

Built 1993 ADT: 8,200

NB IA 27

Over: SEERLEY BLVD

0.2 mi N of University Av, Black Hawk, IA

Built 1994 ADT: 1,175

SB IA 27

Over: SEERLEY BLVD

0.2 mi N of University Av, Black Hawk, IA

Built 1994 ADT: 1,175

NB IA 27

Over: 18TH ST

1.6 mi. S of US 218, Black Hawk, IA

Built 1994 ADT: 1,645

SB IA 27

Over: 18TH ST

1.6 Mi. S of US 218, Black Hawk, IA

Built 1994 ADT: 1,645

NB IA 27

Over: WATERLOO RD

1.3 mi. S of Jct. US 218, Black Hawk, IA

Built 1995 ADT: 2,500

SB IA 27

Over: WATERLOO RD

1.3 mi. S of Jct. US 218, Black Hawk, IA

Built 1995 ADT: 2,500

RAMP J (SB)

Over: IA 57

AT JCT. OF IA 57, Black Hawk, IA

Built 1995 ADT: 16,600

RAMP J(SB)US218

Over: IA 58

0.1 MI. N OF JCT. IA. #57, Black Hawk, IA

Built 1995 ADT: 17,700

NB US 218

Over: LINCOLN ST & OVERFLO

0.3 mi. N of jct. IA 57, Black Hawk, IA

Built 1995 ADT: 1,200

SB US 218

Over: LINCOLN ST & OVERFLO

0.3 Mi. N of Jct. IA 57, Black Hawk, IA

Built 1995 ADT: 1,200

RAMP A (SB)

Over: LINCOLN ST & OVERFLO

0.1 MI. N OF JCT. IA 57, Black Hawk, IA

Built 1995 ADT: 2,400

LONE TREE RD

Over: US 218

1.7 mi N of IA 57 & IA 58, Black Hawk, IA

Built 1995 ADT: 20,500

DUNKERTON RD

Over: US 218

At Jct. Dunkerton Rd., Black Hawk, IA

Built 1995 ADT: 21,200

EB 20

Over: US 218

AT W. JCT. I-380, Black Hawk, IA

Built 1983 ADT: 3,050

US 20 WB

Over: NB/WB RAMP I-380

AT EAST JCT. I-380, Black Hawk, IA

Built 1980 ADT: 4,200

US 20 EB

Over: NB/WB RAMP I-380

AT E JCT. I-380, Black Hawk, IA

Built 1980 ADT: 4,200

SB RP I-380 &20

Over: I-380 & 20

AT EAST JCT. I-380, Black Hawk, IA

Built 1980 ADT: 12,500

V49(RAYMOND RD)

Over: I-380

AT JCT. S.R. V49, Black Hawk, IA

Built 1980 ADT: 26,700

SR V51

Over: U.S. 20

At Jct. SR V51, Black Hawk, IA

Built 1980 ADT: 10,300

FM CO V062

Over: US 20

2.4 MI. W OF SR V65., Black Hawk, IA

Built 1980 ADT: 10,800

SPRING CREEK RD

Over: US 20

0.9 mi. W of Jct. SR V65, Black Hawk, IA

Built 1980 ADT: 10,800

WB US 20

Over: US 63 SERGEANT RD TRAIL

AT JCT. U.S. 63, Black Hawk, IA

Built 1983 ADT: 4,400

FM D-38

Over: I-380

2.8 mi. S of S Jct. US 20, Black Hawk, IA

Built 1984 ADT: 16,200

W 4TH ST

Over: US 20

0.5 MI. E OF JCT. US 63, Black Hawk, IA

Built 1984 ADT: 28,100

ANSBOROUGH AVE

Over: US 20

1.5 MI. W OF JCT. IA 21, Black Hawk, IA

Built 1984 ADT: 23,400

KIMBALL AVE

Over: US 20

0.5 MI. W OF JCT. IA 21, Black Hawk, IA

Built 1984 ADT: 25,900

IA 21

Over: US 20

AT JCT. US 20, Black Hawk, IA

Built 1983 ADT: 18,700

GILBERTVILLE RD

Over: I-380

1.2 MI. N OF JCT. SR V49, Black Hawk, IA

Built 1982 ADT: 29,700

EVANSDALE DR

Over: I-380

AT JCT. OF EVANSDALE DR., Black Hawk, IA

Built 1982 ADT: 27,000

I 380 NB

Over: MCCOY RD

2.6 MI. S OF JCT. US 218, Black Hawk, IA

Built 1983 ADT: 840

I 380 SB

Over: MCCOY RD

2.6 MI. S OF JCT. US 218, Black Hawk, IA

Built 1983 ADT: 840

I 380 NB

Over: ELK RUN CREEK & RD

1.9 MI S OF S JCT. US 218, Black Hawk, IA

Built 1983 ADT: 50

I 380 SB

Over: ELK RUN CREEK & RD

1.9 MI. S OF S JCT US 218, Black Hawk, IA

Built 1983 ADT: 50

I 380 NB

Over: IANR RR,TX ST, CEDAR RVR

0.4 MI. S OF JCT. 218, Black Hawk, IA

Built 1983 ADT: 1,905

US 20 EB IA 27 SB

Over: IANR RR,TX ST, CEDAR RVR

0.4 MI. S OF JCT. 20, Black Hawk, IA

Built 1983 ADT: 1,905

WB 20

Over: US 218

AT W JCT. I-380, Black Hawk, IA

Built 1983 ADT: 3,200

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026