US Bridges

Ia 3 & 12 over Westfield Creek

Good

Plymouth County, Iowa · 0.2 MI E of W JCT Ia 12 · Structure no. 000000000039701

Built
1976
49 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
171 ft
3 main spans
Daily traffic
2,270
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 3 & 12 over Westfield Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 3 & 12 over Westfield Creek in Plymouth County, Iowa. It was built in 1976, so it is 49 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,270 vehicles a day, roughly 14% of them trucks, projected to reach 2,270 by 2042. The structure is 171 ft (52.1 m) long and 53 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesIa 3 & 12
CrossesWestfield Creek
Location0.2 MI E of W JCT Ia 12
RouteState Highway 3
StateIowa
Coordinates42.76457, -96.6024
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.1 US tons
Inventory rating32.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span57 ft (17.4 m)
Deck width53 ft (16.3 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,270 (2022)
Projected traffic2,270 by 2042
Trucks14%
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

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 Ia 3 & 12 over Westfield Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Ia 3 & 12 over Westfield Creek 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 April 2023.

How much traffic does Ia 3 & 12 over Westfield Creek carry?

About 2,270 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Ia 3 & 12 over Westfield Creek?

The structure is 171 ft (52.1 m) long with a longest span of 57 ft (17.4 m) and a deck 53 ft wide.

Who owns Ia 3 & 12 over Westfield Creek?

It is owned by the State Highway Agency.