US Bridges

Main ST over US 69 (grand Ave.)

FairPosted for load

Story County, Iowa · 0.1 Mile N of Lincoln Way · Structure no. 000000000048980

Built
1938
87 years old, rebuilt 1980
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
90 ft
3 main spans
Daily traffic
2,986
2022 count
Owner
State
State Highway Agency

About this bridge

Main ST over US 69 (grand Ave.) is a steel continuous stringer/multi-beam or girder carrying Main ST over US 69 (grand Ave.) in Story County, Iowa. It was built in 1938 and reconstructed in 1980, so it is 87 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 2,986 vehicles a day, projected to reach 2,986 by 2044. The structure is 90 ft (27.4 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain ST
CrossesUS 69 (grand Ave.)
Location0.1 Mile N of Lincoln Way
RouteCity Street 0
CountyStory County
StateIowa
Coordinates42.02504, -93.62039
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 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.8 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length90 ft (27.4 m)
Longest span47 ft (14.3 m)
Deck width46 ft (14.1 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,986 (2022)
Projected traffic2,986 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Main ST over US 69 (grand Ave.) built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1980.

What condition is Main ST over US 69 (grand Ave.) 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 2024.

How much traffic does Main ST over US 69 (grand Ave.) carry?

About 2,986 vehicles per day (2022 count).

How long is Main ST over US 69 (grand Ave.)?

The structure is 90 ft (27.4 m) long with a longest span of 47 ft (14.3 m) and a deck 46 ft wide.

Who owns Main ST over US 69 (grand Ave.)?

It is owned by the State Highway Agency.