US Bridges

Field Entrance over Road Ditch

FairPosted for load

Story County, Iowa · 082232703 · Structure no. 000000000314220

Built
1957
68 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
3 main spans
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

Field Entrance over Road Ditch is a steel stringer/multi-beam or girder carrying Field Entrance over Road Ditch in Story County, Iowa. It was built in 1957, so it is 68 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 10 vehicles a day, roughly 11% of them trucks, projected to reach 10 by 2043. The structure is 50 ft (15.2 m) long and 16 ft wide.

Location

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CarriesField Entrance
CrossesRoad Ditch
Location082232703
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates41.89219, -93.52171
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating15 US tons
Inventory rating9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans3
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span17 ft (5.2 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic10 by 2043
Trucks11%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Field Entrance over Road Ditch built?

It was built in 1957, making it 68 years old in 2025.

What condition is Field Entrance over Road Ditch 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 January 2023.

How much traffic does Field Entrance over Road Ditch carry?

About 10 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Field Entrance over Road Ditch?

The structure is 50 ft (15.2 m) long with a longest span of 17 ft (5.2 m) and a deck 16 ft wide.

Who owns Field Entrance over Road Ditch?

It is owned by the County Highway Agency.