US Bridges

210th ST over Milford 32 Dd

FairPosted for load

Story County, Iowa · 084233401 · Structure no. 000000000315460

Built
1900
125 years old, rebuilt 2010
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
48 ft
2 main spans
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

210th ST over Milford 32 Dd is a steel stringer/multi-beam or girder carrying 210th ST over Milford 32 Dd in Story County, Iowa. It was built in 1900 and reconstructed in 2010, 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 6 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 34 vehicles a day, roughly 18% of them trucks, projected to reach 34 by 2043. The structure is 48 ft (14.6 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries210th ST
CrossesMilford 32 Dd
Location084233401
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.04927, -93.50609
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 alignment8: Equal to present desirable criteria
Operating rating35.3 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadUnknown
Structure length48 ft (14.6 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 traffic34 (2022)
Projected traffic34 by 2043
Trucks18%
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 210th ST over Milford 32 Dd built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 2010.

What condition is 210th ST over Milford 32 Dd 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 210th ST over Milford 32 Dd carry?

About 34 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is 210th ST over Milford 32 Dd?

The structure is 48 ft (14.6 m) long with a longest span of 31 ft (9.4 m) and a deck 24 ft wide.

Who owns 210th ST over Milford 32 Dd?

It is owned by the County Highway Agency.