US Bridges

S Dayton Ave over US 30

Fair

Story County, Iowa · 0.8 Mile West of I-35 · Structure no. 000000000601300

Built
1994
31 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
205 ft
2 main spans
Daily traffic
5,164
2022 count
Owner
State
State Highway Agency

About this bridge

S Dayton Ave over US 30 is a prestressed concrete stringer/multi-beam or girder carrying S Dayton Ave over US 30 in Story County, Iowa. It was built in 1994, so it is 31 years old, younger 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.

It carries about 5,164 vehicles a day, roughly 11% of them trucks, projected to reach 5,164 by 2044. The structure is 205 ft (62.5 m) long and 47 ft wide.

CarriesS Dayton Ave
CrossesUS 30
Location0.8 Mile West of I-35
RouteCity Street 0
StateIowa
Coordinates42.00629, -93.58637
Functional classUrban Minor Arterial

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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating95.6 US tons
Inventory rating45 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length205 ft (62.5 m)
Longest span101 ft (30.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,164 (2022)
Projected traffic5,164 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 S Dayton Ave over US 30 built?

It was built in 1994, making it 31 years old in 2025.

What condition is S Dayton Ave over US 30 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 August 2024.

How much traffic does S Dayton Ave over US 30 carry?

About 5,164 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is S Dayton Ave over US 30?

The structure is 205 ft (62.5 m) long with a longest span of 101 ft (30.8 m) and a deck 47 ft wide.

Who owns S Dayton Ave over US 30?

It is owned by the State Highway Agency.