US Bridges

Field Entrance over Side Ditch

Fair

Madison County, Iowa · 075270806 · Structure no. 000000000233095

Built
1940
85 years old, rebuilt 2012
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

Field Entrance over Side Ditch is a steel stringer/multi-beam or girder carrying Field Entrance over Side Ditch in Madison County, Iowa. It was built in 1940 and reconstructed in 2012, so it is 85 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.

It carries about 10 vehicles a day, roughly 11% of them trucks, projected to reach 10 by 2043. The structure is 28 ft (8.5 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesField Entrance
CrossesSide Ditch
Location075270806
RouteCounty Highway 0
CountyMadison County
StateIowa
Coordinates41.30298, -93.97776
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width15 ft (4.5 m)
Roadway width14 ft (4.3 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 closed98.8 mi (159 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Field Entrance over Side Ditch built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2012.

What condition is Field Entrance over Side 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 August 2023.

How much traffic does Field Entrance over Side Ditch carry?

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

How long is Field Entrance over Side Ditch?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 15 ft wide.

Who owns Field Entrance over Side Ditch?

It is owned by the County Highway Agency.