US Bridges

Curran ST over US 34

Fair

Des Moines County, Iowa · 0.8 Mi. E of Jct. US 61 · Structure no. 000000000602880

Built
1973
52 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
429 ft
6 main spans
Daily traffic
6,500
2022 count
Owner
State
State Highway Agency

About this bridge

Curran ST over US 34 is a prestressed concrete stringer/multi-beam or girder carrying Curran ST over US 34 in Des Moines County, Iowa. It was built in 1973, so it is 52 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.

It carries about 6,500 vehicles a day, roughly 1% of them trucks, projected to reach 6,500 by 2043. The structure is 429 ft (130.8 m) long and 63 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCurran ST
CrossesUS 34
Location0.8 Mi. E of Jct. US 61
RouteCity Street 0
CountyDes Moines County
StateIowa
Coordinates40.81717, -91.12633
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.6 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length429 ft (130.8 m)
Longest span82 ft (25 m)
Deck width63 ft (19.1 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2022)
Projected traffic6,500 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Curran ST over US 34 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Curran ST over US 34 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 November 2023.

How much traffic does Curran ST over US 34 carry?

About 6,500 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Curran ST over US 34?

The structure is 429 ft (130.8 m) long with a longest span of 82 ft (25 m) and a deck 63 ft wide.

Who owns Curran ST over US 34?

It is owned by the State Highway Agency.