US Bridges

Ia 12 over Beaver Creek

Fair

Plymouth County, Iowa · 0.5 Mi. N of SR C16 · Structure no. 000000000039971

Built
1975
50 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
134 ft
3 main spans
Daily traffic
1,130
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 12 over Beaver Creek is a concrete continuous slab carrying Ia 12 over Beaver Creek in Plymouth County, Iowa. It was built in 1975, so it is 50 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 1,130 vehicles a day, roughly 27% of them trucks, projected to reach 1,130 by 2043. The structure is 134 ft (40.8 m) long and 48 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesIa 12
CrossesBeaver Creek
Location0.5 Mi. N of SR C16
RouteState Highway 12
CountyPlymouth County
StateIowa
Coordinates42.84357, -96.54389
Functional classRural Minor 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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating70 US tons
Inventory rating41.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span51 ft (15.5 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,130 (2023)
Projected traffic1,130 by 2043
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 12 over Beaver Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Ia 12 over Beaver 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 July 2023.

How much traffic does Ia 12 over Beaver Creek carry?

About 1,130 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is Ia 12 over Beaver Creek?

The structure is 134 ft (40.8 m) long with a longest span of 51 ft (15.5 m) and a deck 48 ft wide.

Who owns Ia 12 over Beaver Creek?

It is owned by the State Highway Agency.