Jefferson County, IA

142 public highway bridges

Jefferson County Bridge Snapshot

Jefferson County, Iowa contains 142 public highway bridges in the FHWA National Bridge Inventory. Roughly 38.7% are rated “Good,” 36.6% “Fair,” 18.3% “Poor,” and 18.3% 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 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.

142
Total Bridges
38.7%
Good
18.3%
Poor
18.3%
Structurally Deficient

Condition Distribution

Good
38.7% (55)
Fair
36.6% (52)
Poor
18.3% (26)
SD
18.3% (26)

All Bridges (142)

LIBERTYVILLE RD

Unknown

Over: US 34

1.6 mi. W of Jct. IA 1, Jefferson, IA

Built 2006 ADT: 5,300

US 34 EB

Unknown

Over: ASH AVE

At Jct. SR H43, Jefferson, IA

Built 2006 ADT: 550

US 34 WB

Unknown

Over: ASH AVE

At Jct. SR H43, Jefferson, IA

Built 2006 ADT: 550

GLASGOW RD H 46

Unknown

Over: US 34

1.8 mi. E of Jct. IA 1, Jefferson, IA

Built 2006 ADT: 5,700

US 34 EB

Unknown

Over: OLD US 34

3.9 mi. W of Jct. IA 1, Jefferson, IA

Built 2007 ADT: 1,650

US 34 WB

Unknown

Over: OLD US 34

3.9 mi. W of Jct. Iowa #1, Jefferson, IA

Built 2007 ADT: 1,650

US 34 EB

Unknown

Over: IA 1

At Jct. Iowa 1, Jefferson, IA

Built 2007 ADT: 2,200

US 34 WB

Unknown

Over: IA 1

At the Jct. Iowa 1, Jefferson, IA

Built 2007 ADT: 4,400

OSAGE AVE

Unknown

Over: RELOC US 34

3.0 mi. E of Jct. IA #1, Jefferson, IA

Built 2007 ADT: 5,200

FM

Fair

Over: CREEK

073112806, Jefferson, IA

Built 1957 ADT: 20

FM

Fair

Over: CREEK

072081903, Jefferson, IA

Built 1948 Load: 13.0 t ADT: 25

IA 1

Fair

Over: CROW CREEK

0.7 mi. N of jct SR W21, Jefferson, IA

Built 1928 Load: 13.6 t ADT: 4,100

FM

Fair

Over: STUMP CREEK

071113004, Jefferson, IA

Built 1952 Load: 15.7 t ADT: 110

FM

Fair

Over: DRAINAGE

072081806, Jefferson, IA

Built 1950 Load: 16.3 t ADT: 60

LOCAL

Fair

Over: BIG CEDAR CREEK

072112004, Jefferson, IA

Built 1950 Load: 17.4 t ADT: 40

LOCAL

Fair

Over: TURKEY CREEK

072081104, Jefferson, IA

Built 1966 Load: 18.0 t ADT: 26

FM

Fair

Over: CREEK

073083002, Jefferson, IA

Built 1950 Load: 18.3 t ADT: 50

FM

Fair

Over: CREEK

073091604, Jefferson, IA

Built 1965 Load: 18.8 t ADT: 15

FM

Fair

Over: WALNUT CREEK

073082704, Jefferson, IA

Built 1936 Load: 19.5 t ADT: 360

LOCAL

Fair

Over: BRUSH CREEK

072082802, Jefferson, IA

Built 1970 Load: 21.0 t ADT: 26

LOCAL

Fair

Over: CROW CREEK

072093104, Jefferson, IA

Built 1975 Load: 21.0 t ADT: 110

LOCAL

Fair

Over: STREAM

073091708, Jefferson, IA

Built 1972 Load: 21.0 t ADT: 26

FM

Fair

Over: MIDDLE WALNUT

073092004, Jefferson, IA

Built 1975 Load: 21.0 t ADT: 40

FM

Fair

Over: BRUSH CREEK

072083606, Jefferson, IA

Built 1975 Load: 22.3 t ADT: 50

LOCAL

Fair

Over: WALNUT CREEK

073092404, Jefferson, IA

Built 1979 Load: 22.3 t ADT: 15

FM

Fair

Over: CREEK

073113604, Jefferson, IA

Built 1967 Load: 22.6 t ADT: 1,120

LOCAL

Fair

Over: STREAM

073090401, Jefferson, IA

Built 1966 Load: 24.5 t ADT: 15

FM

Fair

Over: BIG CEDAR RIVER

071083204, Jefferson, IA

Built 1977 Load: 25.6 t ADT: 50

FM

Fair

Over: ROCK CREEK

071110610, Jefferson, IA

Built 1964 Load: 25.9 t ADT: 270

LOCAL

Fair

Over: SMITH CREEK

072110202, Jefferson, IA

Built 1965 Load: 26.8 t ADT: 30

LOCAL

Fair

Over: COON CREEK

073113307, Jefferson, IA

Built 1954 Load: 26.8 t ADT: 30

IA 1

Fair

Over: BIG CEDAR CREEK

2.9 MI. S of Jct. US 34, Jefferson, IA

Built 1967 Load: 28.1 t ADT: 2,730

FM

Fair

Over: CREEK

072102103, Jefferson, IA

Built 1973 Load: 28.6 t ADT: 810

FM

Fair

Over: COON CREEK

072110403, Jefferson, IA

Built 1986 Load: 28.6 t ADT: 110

FM

Fair

Over: ROCK BRANCH CREEK

072080302, Jefferson, IA

Built 1974 Load: 30.2 t ADT: 360

LOCAL

Fair

Over: WALNUT CREEK

073091802, Jefferson, IA

Built 1978 Load: 30.4 t ADT: 26

FM

Fair

Over: STREAM

073111705, Jefferson, IA

Built 1956 Load: 32.2 t ADT: 260

FM

Fair

Over: DRAINAGE

071081108, Jefferson, IA

Built 1992 Load: 32.7 t ADT: 390

LOCAL

Fair

Over: BRANCH OF WOLF CREEK

071081201, Jefferson, IA

Built 1972 Load: 32.7 t ADT: 45

LOCAL

Fair

Over: BRANCH BRUSH CREEK

072090906, Jefferson, IA

Built 1986 Load: 32.7 t ADT: 15

LOCAL

Fair

Over: BRUSH CREEK

072091006, Jefferson, IA

Built 1986 Load: 32.7 t ADT: 60

LOCAL

Fair

Over: BR BIG BEAR CREEK

072103004, Jefferson, IA

Built 1987 Load: 32.7 t ADT: 20

FM

Fair

Over: STREAM

072111205, Jefferson, IA

Built 1973 Load: 32.7 t ADT: 810

LOCAL

Fair

Over: SOUTH WALNUT CREEK

073093204, Jefferson, IA

Built 1986 Load: 32.7 t ADT: 30

FM

Fair

Over: CREEK

073101201, Jefferson, IA

Built 1996 Load: 32.7 t ADT: 190

FM

Fair

Over: OVER BNSF RR

072102704, Jefferson, IA

Built 1981 Load: 32.7 t ADT: 1,310

LOCAL

Fair

Over: COMPETINE CK

072112105, Jefferson, IA

Built 1983 Load: 32.8 t ADT: 11

LOCAL

Fair

Over: BURR OAK CREEK

073080703, Jefferson, IA

Built 1978 Load: 33.3 t ADT: 20

LOCAL

Fair

Over: STREAM

073090702, Jefferson, IA

Built 1972 Load: 33.3 t ADT: 15

US 34 EB

Fair

Over: MITCHELL CREEK

3.6 mi. W of Jct. IA 1, Jefferson, IA

Built 2008 Load: 34.5 t ADT: 2,485

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