US Bridges

Central Ave N over Shellrock River

Poor

Worth County, Iowa · 000000000 · Structure no. 000000000054180

Built
1950
75 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
124 ft
3 main spans
Daily traffic
1,868
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Central Ave N over Shellrock River is a steel continuous stringer/multi-beam or girder carrying Central Ave N over Shellrock River in Worth County, Iowa. It was built in 1950, so it is 75 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,868 vehicles a day, roughly 18% of them trucks, projected to reach 1,868 by 2043. The structure is 124 ft (37.8 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCentral Ave N
CrossesShellrock River
Location000000000
RouteCity Street 0
StateIowa
Coordinates43.44416, -93.23027
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating36.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length124 ft (37.8 m)
Longest span47 ft (14.3 m)
Deck width32 ft (9.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,868 (2022)
Projected traffic1,868 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Central Ave N over Shellrock River built?

It was built in 1950, making it 75 years old in 2025.

What condition is Central Ave N over Shellrock River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does Central Ave N over Shellrock River carry?

About 1,868 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Central Ave N over Shellrock River?

The structure is 124 ft (37.8 m) long with a longest span of 47 ft (14.3 m) and a deck 32 ft wide.

Who owns Central Ave N over Shellrock River?

It is owned by the City or Municipal Highway Agency.