US Bridges

Local over Dd 9-13

Fair

Calhoun County, Iowa · 089322601 · Structure no. 000000000092591

Built
1973
52 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
91 ft
3 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Dd 9-13 is a concrete continuous slab carrying Local over Dd 9-13 in Calhoun County, Iowa. It was built in 1973, so it is 52 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 20 vehicles a day, projected to reach 20 by 2043. The structure is 91 ft (27.7 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLocal
CrossesDd 9-13
Location089322601
RouteCounty Highway 0
CountyCalhoun County
StateIowa
Coordinates42.50259, -94.59734
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 inspectionJuly 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.5 US tons
Inventory rating33.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length91 ft (27.7 m)
Longest span34 ft (10.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$1.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Dd 9-13 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Local over Dd 9-13 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 2023.

How much traffic does Local over Dd 9-13 carry?

About 20 vehicles per day (2022 count).

How long is Local over Dd 9-13?

The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 32 ft wide.

Who owns Local over Dd 9-13?

It is owned by the County Highway Agency.