US Bridges

610th Ave over Dd 32

FairPosted for load

Story County, Iowa · 084233602 · Structure no. 000000000315481

Built
1900
125 years old, rebuilt 1987
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

610th Ave over Dd 32 is a steel stringer/multi-beam or girder carrying 610th Ave over Dd 32 in Story County, Iowa. It was built in 1900 and reconstructed in 1987, so it is 125 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 45 vehicles a day, projected to reach 45 by 2042. The structure is 50 ft (15.2 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries610th Ave
CrossesDd 32
Location084233602
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.04216, -93.48254
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1 (+1 approach)
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span31 ft (9.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 610th Ave over Dd 32 built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1987.

What condition is 610th Ave over Dd 32 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2022.

How much traffic does 610th Ave over Dd 32 carry?

About 45 vehicles per day (2022 count).

How long is 610th Ave over Dd 32?

The structure is 50 ft (15.2 m) long with a longest span of 31 ft (9.4 m) and a deck 24 ft wide.

Who owns 610th Ave over Dd 32?

It is owned by the County Highway Agency.