US Bridges

225th Street over Silver Creek

Good

Clinton County, Iowa · 081E30208 · Structure no. 000000000122041

Built
1997
28 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
200
2022 count
Owner
County
County Highway Agency

About this bridge

225th Street over Silver Creek is a concrete continuous slab carrying 225th Street over Silver Creek in Clinton County, Iowa. It was built in 1997, so it is 28 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 200 vehicles a day, roughly 7% of them trucks, projected to reach 200 by 2044. The structure is 128 ft (39 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries225th Street
CrossesSilver Creek
Location081E30208
RouteCounty Highway 0
StateIowa
Coordinates41.84691, -90.57776
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 protection7 GoodSome minor problems.
Last inspectionJune 2024
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 alignment8: Equal to present desirable criteria
Operating rating84.7 US tons
Inventory rating48.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span49 ft (14.9 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2022)
Projected traffic200 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 225th Street over Silver Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is 225th Street over Silver 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 June 2024.

How much traffic does 225th Street over Silver Creek carry?

About 200 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is 225th Street over Silver Creek?

The structure is 128 ft (39 m) long with a longest span of 49 ft (14.9 m) and a deck 33 ft wide.

Who owns 225th Street over Silver Creek?

It is owned by the County Highway Agency.