US Bridges

113th ST (fld) over Road Ditch

FairPosted for load

Story County, Iowa · 085211003 · Structure no. 000000000315710

Built
1900
125 years old, rebuilt 1988
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
21 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

113th ST (fld) over Road Ditch is a wood or timber stringer/multi-beam or girder carrying 113th ST (fld) over Road Ditch in Story County, Iowa. It was built in 1900 and reconstructed in 1988, 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 10 vehicles a day, projected to reach 10 by 2043. The structure is 21 ft (6.4 m) long and 16 ft wide.

Location

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Carries113th ST (fld)
CrossesRoad Ditch
Location085211003
RouteCounty Highway 0
CountyStory County
StateIowa
Coordinates42.19142, -93.28031
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span19 ft (5.8 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
Trucks0%
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 113th ST (fld) over Road Ditch built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1988.

What condition is 113th ST (fld) 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 November 2022.

How much traffic does 113th ST (fld) over Road Ditch carry?

About 10 vehicles per day (2022 count).

How long is 113th ST (fld) over Road Ditch?

The structure is 21 ft (6.4 m) long with a longest span of 19 ft (5.8 m) and a deck 16 ft wide.

Who owns 113th ST (fld) over Road Ditch?

It is owned by the County Highway Agency.