US Bridges

580th Ave over Long Dick Creek

PoorPosted for load

Story County, Iowa · 085231602 · Structure no. 000000000316190

Built
1964
61 years old
Condition
Poor
inspected December 2022
Type
Truss - Thru
Steel
Length
62 ft
1 main span
Daily traffic
51
2023 count
Owner
County
County Highway Agency

About this bridge

580th Ave over Long Dick Creek is a steel truss - thru carrying 580th Ave over Long Dick Creek 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 51 vehicles a day, projected to reach 51 by 2043. The structure is 62 ft (18.9 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries580th Ave
CrossesLong Dick Creek
Location085231602
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.17723, -93.54088
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15 US tons
Inventory rating10 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length62 ft (18.9 m)
Longest span60 ft (18.3 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2023)
Projected traffic51 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 580th Ave over Long Dick Creek built?

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

What condition is 580th Ave over Long Dick Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2022.

How much traffic does 580th Ave over Long Dick Creek carry?

About 51 vehicles per day (2023 count).

How long is 580th Ave over Long Dick Creek?

The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 24 ft wide.

Who owns 580th Ave over Long Dick Creek?

It is owned by the County Highway Agency.