US Bridges

252nd ST over Silver Creek

Fair

Clinton County, Iowa · 081E32305 · Structure no. 000000000122142

Built
1971
54 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
160 ft
5 main spans
Daily traffic
760
2022 count
Owner
County
County Highway Agency

About this bridge

252nd ST over Silver Creek is a concrete continuous slab carrying 252nd ST over Silver Creek in Clinton County, Iowa. It was built in 1971, so it is 54 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 760 vehicles a day, projected to reach 760 by 2044. The structure is 160 ft (48.8 m) long and 32 ft wide.

Carries252nd ST
CrossesSilver Creek
Location081E32305
RouteCounty Highway 0
StateIowa
Coordinates41.81113, -90.57554
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating38.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span34 ft (10.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic760 (2022)
Projected traffic760 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 252nd ST over Silver Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is 252nd ST over Silver 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 June 2024.

How much traffic does 252nd ST over Silver Creek carry?

About 760 vehicles per day (2022 count).

How long is 252nd ST over Silver Creek?

The structure is 160 ft (48.8 m) long with a longest span of 34 ft (10.4 m) and a deck 32 ft wide.

Who owns 252nd ST over Silver Creek?

It is owned by the County Highway Agency.