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:

I380 SB FLYOVER

Over: US 20 & US 218

AT N JCT. 20, Black Hawk, IA

Built 1983 ADT: 17,900

NB I-380

Over: SAN MARNAN DR

1.1 MI. N OF N JCT. US 20, Black Hawk, IA

Built 1983 ADT: 3,000

I 380 SB

Over: SAN MARNAN DR

1.0 MI. N of N Jct. 20, Black Hawk, IA

Built 1983 ADT: 3,000

EB US 20

Over: US 63 SERGEANT RD TRAIL

AT JCT. US 63, Black Hawk, IA

Built 1983 ADT: 4,400

US 20 OFF RAMP

Over: US 63

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

Built 1983 ADT: 8,800

WB US 20

Over: HESS RD

0.3 mi.W of W jct 380/218, Black Hawk, IA

Built 1983 ADT: 2,320

EB US 20

Over: HESS RD

0.3 mi W of W jct 380/218, Black Hawk, IA

Built 1983 ADT: 2,320

I380 S TO US 20 W

Over: HESS RD

0.3 MI. W OF W JCT. I-380, Black Hawk, IA

Built 1983 ADT: 4,640

HAMMOND AVE

Over: US 20

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

Built 1984 ADT: 23,000

I 380 NB

Over: IANR RR & TEXAS ST

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

Built 1983 ADT: 3,810

I 380 SB

Over: IANR RR,TX ST, CEDAR RVR

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

Built 1983 ADT: 3,810

V62

Over: I-380

2.3 MI. N OF S.R. V65, Black Hawk, IA

Built 1984 ADT: 16,800

JUBLIEE RD

Over: I-380

3.7 MI. N OF SR V65, Black Hawk, IA

Built 1984 ADT: 16,800

FM V-51

Over: I-380

3.5 mi S of S jct 20, Black Hawk, IA

Built 1984 ADT: 16,800

SB IA 58

Over: US 20

At jct. U.S. 20, Black Hawk, IA

Built 1984 ADT: 6,350

NB IA 58

Over: U.S. 20

At the Jct. U.S. 20, Black Hawk, IA

Built 1984 ADT: 6,350

US 20 EB

Over: IA 58

At the Jct. Iowa #27 & 58, Black Hawk, IA

Built 1984 ADT: 3,850

WB US 20

Over: IA 58

At the Jct. Iowa #27 & 58, Black Hawk, IA

Built 1984 ADT: 3,850

US 218

Over: QUARRY LAKE & WYTH RD

2.5 Mi. S of Jct. Ia. #57, Black Hawk, IA

UNIVERSITY AVE

Over: GREEN HILL RD

CITY BRIDGE NO. 60, Black Hawk, IA

Built 1989 ADT: 4,120

GREENHILL RD

Over: US 218

2.2 mi. N of US 63, Black Hawk, IA

Built 1989 ADT: 21,500

US 218

Over: CEDAR RVR & GREENWOOD AV

2.9 MI. S JCT. IA #57, Black Hawk, IA

Built 1989 ADT: 76

US 218

Over: BROADWAY ST

1.3 MI S of Jct. IA 57, Black Hawk, IA

Built 1989 ADT: 3,370

US 218

Over: AIRPORT BLVD

1.1 miles S of jct. IA 27, Black Hawk, IA

Built 1989 ADT: 4,310

NB US 218

Over: 4TH, 5TH, 6TH & W PARK

.4 mi S of Jct. NB US 218, Black Hawk, IA

Built 1991 ADT: 2,750

US 218 SB

Over: 4TH, 5TH, 6TH & W PARK

.4 mi. S of Jct.NB US 218, Black Hawk, IA

Built 1991 ADT: 1,070

NB US 218

Over: NB US 63

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

Built 1991 ADT: 2,700

US 218 SB OFF RAMP

Over: NB US 63

AT JCT NB US 63 IN WTRLOO, Black Hawk, IA

Built 1991 ADT: 5,400

US 218 NB

Over: SB US 63

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

Built 1991 ADT: 3,200

VIKING ROAD

Over: IA 27 & 58

4.2 M S of Jct US 218, Black Hawk, IA

Built 2019 ADT: 9,800

RUDI PLACE

Over: DRY RUN CREEK

CITY BRIDGE NO. 28, Black Hawk, IA

Built 1961 Load: 6.7 t ADT: 684

IA 281

Over: POYNER CREEK

1.9 Mi. E OF Jct. SR V49, Black Hawk, IA

Built 1951 Load: 14.0 t ADT: 1,080

FINCHFORD RD

Over: WEST FORK CEDAR RIVER

90-14-06-08, Black Hawk, IA

Built 1959 Load: 15.3 t ADT: 373

US 20

Over: DRAINAGE

1.9 mi. E of E Jct. I-380, Black Hawk, IA

Built 1980 Load: 17.1 t ADT: 10,200

IA 21

Over: STREAM

0.4 MI. S OF JCT. SR D52, Black Hawk, IA

Built 1959 Load: 18.1 t ADT: 2,600

IA 21

Over: STREAM

4.6 MI. S OF JCT. US 20, Black Hawk, IA

Built 1959 Load: 18.1 t ADT: 2,480

E QUARRY RD

Over: MILLER CREEK

87-12-18-01-10, Black Hawk, IA

Built 1961 Load: 18.1 t ADT: 33

YOUNG RD

Over: TRIB TO INDIAN CREEK

88-11-08-01-10, Black Hawk, IA

Built 1968 Load: 18.1 t ADT: 29

HARMON RD

Over: SPRING CREEK

87-11-27-01-10, Black Hawk, IA

Built 1948 Load: 18.3 t ADT: 39

HESS RD

Over: TRIB TO MILLER CREEK

87-13-25-02-10, Black Hawk, IA

Built 1961 Load: 18.3 t ADT: 20

E TAMA RD

Over: TRIB TO MILLER CREEK

87-13-35-01-10, Black Hawk, IA

Built 1974 Load: 18.3 t ADT: 314

E MARQUIS RD

Over: TRIB TO CRANE CREEK

90-11-06-01-10, Black Hawk, IA

Built 2001 Load: 18.4 t ADT: 187

PARK LANE

Over: DRY RUN CREEK

CITY CULVERT NO. 36C, Black Hawk, IA

Built 1968 Load: 18.7 t ADT: 3,587

MOLINE RD

Over: TRIB QUARTER SECTION RUN

90-12-07-02-10, Black Hawk, IA

Built 1956 Load: 19.0 t ADT: 49

TREMONT ST

Over: SMALL STREAM

000000000, Black Hawk, IA

Built 1956 Load: 20.1 t ADT: 342

BARNES FERRY RD

Over: TRIB TO CEDAR RIVER

87-11-20-06-10, Black Hawk, IA

Built 1978 Load: 20.8 t ADT: 334

E REINBECK RD

Over: MILLER CREEK

87-13-26-01-10, Black Hawk, IA

Built 1948 Load: 21.7 t ADT: 5

N PILOT GROVE RD

Over: CRANE CREEK

90-11-29-02-10, Black Hawk, IA

Built 1948 Load: 21.7 t ADT: 59

E BENNINGTON RD

Over: CRANE CREEK

90-12-23-01-10, Black Hawk, IA

Built 1948 Load: 21.7 t ADT: 29

MC STAY RD

Over: TRIB TO INDIAN CREEK

88-11-19-01-10, Black Hawk, IA

Built 1950 Load: 21.8 t ADT: 11

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