US Bridges

165th Street over Silver Creek (west)

Good

Clinton County, Iowa · 082E30505 · Structure no. 000000000123431

Built
2006
19 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

165th Street over Silver Creek (west) is a steel stringer/multi-beam or girder carrying 165th Street over Silver Creek (west) in Clinton County, Iowa. It was built in 2006, so it is 19 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 62 vehicles a day, projected to reach 62 by 2045. The structure is 37 ft (11.3 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Carries165th Street
CrossesSilver Creek (west)
Location082E30505
RouteCounty Highway 0
StateIowa
Coordinates41.93809, -90.62714
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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating62.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span35 ft (10.7 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)
Projected traffic62 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 165th Street over Silver Creek (west) built?

It was built in 2006, making it 19 years old in 2025.

What condition is 165th Street over Silver Creek (west) 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 February 2025.

How much traffic does 165th Street over Silver Creek (west) carry?

About 62 vehicles per day (2022 count).

How long is 165th Street over Silver Creek (west)?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.

Who owns 165th Street over Silver Creek (west)?

It is owned by the County Highway Agency.