US Bridges

Local over D.D.

Fair

Calhoun County, Iowa · 088341101 · Structure no. 000000000092260

Built
1977
48 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

Local over D.D. is a prestressed concrete tee beam carrying Local over D.D. in Calhoun County, Iowa. It was built in 1977, so it is 48 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 6 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 11 vehicles a day, projected to reach 11 by 2044. The structure is 51 ft (15.5 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLocal
CrossesD.D.
Location088341101
RouteCounty Highway 0
CountyCalhoun County
StateIowa
Coordinates42.4569, -94.76973
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length51 ft (15.5 m)
Longest span50 ft (15.2 m)
Deck width26 ft (7.8 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic11 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over D.D. built?

It was built in 1977, making it 48 years old in 2025.

What condition is Local over D.D. 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 Local over D.D. carry?

About 11 vehicles per day (2022 count).

How long is Local over D.D.?

The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 26 ft wide.

Who owns Local over D.D.?

It is owned by the County Highway Agency.