US Bridges

Local over Dd #3

Good

Humboldt County, Iowa · 091271403 · Structure no. 000000000184121

Built
1989
36 years old
Condition
Good
inspected November 2022
Type
Slab
Concrete Continuous
Length
121 ft
3 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Dd #3 is a concrete continuous slab carrying Local over Dd #3 in Humboldt County, Iowa. It was built in 1989, so it is 36 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, projected to reach 40 by 2043. The structure is 121 ft (36.9 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLocal
CrossesDd #3
Location091271403
RouteCounty Highway 0
CountyHumboldt County
StateIowa
Coordinates42.69529, -94.00712
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating96.7 US tons
Inventory rating58 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span49 ft (14.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Dd #3 built?

It was built in 1989, making it 36 years old in 2025.

What condition is Local over Dd #3 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2022.

How much traffic does Local over Dd #3 carry?

About 40 vehicles per day (2022 count).

How long is Local over Dd #3?

The structure is 121 ft (36.9 m) long with a longest span of 49 ft (14.9 m) and a deck 27 ft wide.

Who owns Local over Dd #3?

It is owned by the County Highway Agency.