US Bridges

NB Ia 376 over Dry Creek

Fair

Woodbury County, Iowa · 0.1 Mi. N of Jct. SR D12 · Structure no. 000000000053091

Built
1931
94 years old, rebuilt 1972
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
3,750
2022 count
Owner
State
State Highway Agency

About this bridge

NB Ia 376 over Dry Creek is a concrete slab carrying NB Ia 376 over Dry Creek in Woodbury County, Iowa. It was built in 1931 and reconstructed in 1972, so it is 94 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 3,750 vehicles a day, roughly 8% of them trucks, projected to reach 3,750 by 2044. The structure is 23 ft (7 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB Ia 376
CrossesDry Creek
Location0.1 Mi. N of Jct. SR D12
RouteState Highway 376
CountyWoodbury County
StateIowa
Coordinates42.54984, -96.34723
Functional classUrban Other Principal Arterial

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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width54 ft (16.5 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2022)
Projected traffic3,750 by 2044
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 NB Ia 376 over Dry Creek built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1972.

What condition is NB Ia 376 over Dry Creek 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 October 2024.

How much traffic does NB Ia 376 over Dry Creek carry?

About 3,750 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is NB Ia 376 over Dry Creek?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 54 ft wide.

Who owns NB Ia 376 over Dry Creek?

It is owned by the State Highway Agency.