US Bridges

680th Ave over Dye Creek

FairPosted for load

Story County, Iowa · 083221204 · Structure no. 000000000314540

Built
1900
125 years old, rebuilt 1974
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

680th Ave over Dye Creek is a steel stringer/multi-beam or girder carrying 680th Ave over Dye Creek in Story County, Iowa. It was built in 1900 and reconstructed in 1974, so it is 125 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 26 vehicles a day, projected to reach 26 by 2043. The structure is 62 ft (18.9 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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Carries680th Ave
CrossesDye Creek
Location083221204
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.01277, -93.35241
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment2: Basically intolerable, requiring high priority of replacement
Operating rating31.5 US tons
Inventory rating21.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length62 ft (18.9 m)
Longest span31 ft (9.4 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 680th Ave over Dye Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1974.

What condition is 680th Ave over Dye 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 December 2022.

How much traffic does 680th Ave over Dye Creek carry?

About 26 vehicles per day (2022 count).

How long is 680th Ave over Dye Creek?

The structure is 62 ft (18.9 m) long with a longest span of 31 ft (9.4 m) and a deck 18 ft wide.

Who owns 680th Ave over Dye Creek?

It is owned by the County Highway Agency.