US Bridges

E63 315th ST over I-35

FairClosed to traffic

Story County, Iowa · 1.5 Miles N of JCT Ia 210 · Structure no. 000000000049140

Built
1964
61 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
222 ft
4 main spans
Daily traffic
1,148
2022 count
Owner
State
State Highway Agency

About this bridge

E63 315th ST over I-35 is a prestressed concrete stringer/multi-beam or girder carrying E63 315th ST over I-35 in Story County, Iowa. It was built in 1964, so it is 61 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: closed to all traffic.

It carries about 1,148 vehicles a day, roughly 7% of them trucks, projected to reach 1,148 by 2042. The structure is 222 ft (67.7 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesE63 315th ST
CrossesI-35
Location1.5 Miles N of JCT Ia 210
RouteCity Street 0
CountyStory County
StateIowa
Coordinates41.8996, -93.57149
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.2 US tons
Inventory rating22.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length222 ft (67.7 m)
Longest span69 ft (21 m)
Deck width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,148 (2022)
Projected traffic1,148 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 E63 315th ST over I-35 built?

It was built in 1964, making it 61 years old in 2025.

What condition is E63 315th ST over I-35 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 E63 315th ST over I-35 carry?

About 1,148 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is E63 315th ST over I-35?

The structure is 222 ft (67.7 m) long with a longest span of 69 ft (21 m) and a deck 32 ft wide.

Who owns E63 315th ST over I-35?

It is owned by the State Highway Agency.