US Bridges

590th Ave over Long Dick Creek

Fair

Story County, Iowa · 085230302 · Structure no. 000000000316131

Built
1975
50 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
60
2022 count
Owner
County
County Highway Agency

About this bridge

590th Ave over Long Dick Creek is a steel stringer/multi-beam or girder carrying 590th Ave over Long Dick Creek in Story County, Iowa. It was built in 1975, so it is 50 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.

It carries about 60 vehicles a day, projected to reach 60 by 2043. The structure is 57 ft (17.4 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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Carries590th Ave
CrossesLong Dick Creek
Location085230302
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.19853, -93.52141
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2022)
Projected traffic60 by 2043
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 590th Ave over Long Dick Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is 590th Ave over Long Dick Creek 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 2022.

How much traffic does 590th Ave over Long Dick Creek carry?

About 60 vehicles per day (2022 count).

How long is 590th Ave over Long Dick Creek?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns 590th Ave over Long Dick Creek?

It is owned by the County Highway Agency.