US Bridges

CO RD over Drainage Ditch

Fair

Calhoun County, Iowa · 088313501 · Structure no. 000000000016880

Built
1921
104 years old, rebuilt 1956
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
669
2022 count
Owner
County
County Highway Agency

About this bridge

CO RD over Drainage Ditch is a steel stringer/multi-beam or girder carrying CO RD over Drainage Ditch in Calhoun County, Iowa. It was built in 1921 and reconstructed in 1956, so it is 104 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 669 vehicles a day, roughly 24% of them trucks, projected to reach 669 by 2044. The structure is 52 ft (15.9 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCO RD
CrossesDrainage Ditch
Location088313501
RouteCounty Highway 0
CountyCalhoun County
StateIowa
Coordinates42.39838, -94.43592
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
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 inspectionJuly 2024
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 alignment7: Better than present minimum criteria
Operating rating41.2 US tons
Inventory rating20.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length52 ft (15.9 m)
Longest span48 ft (14.6 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic669 (2022)
Projected traffic669 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD over Drainage Ditch built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1956.

What condition is CO RD over Drainage 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 July 2024.

How much traffic does CO RD over Drainage Ditch carry?

About 669 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is CO RD over Drainage Ditch?

The structure is 52 ft (15.9 m) long with a longest span of 48 ft (14.6 m) and a deck 34 ft wide.

Who owns CO RD over Drainage Ditch?

It is owned by the County Highway Agency and maintained by the State Highway Agency.