US Bridges

345th Avenue over Creek

Good

Clinton County, Iowa · 000000000 · Structure no. 000000000124151

Built
2010
15 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
41 ft
1 main span
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

345th Avenue over Creek is a steel stringer/multi-beam or girder carrying 345th Avenue over Creek in Clinton County, Iowa. It was built in 2010, so it is 15 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 9 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 41 ft (12.5 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries345th Avenue
CrossesCreek
Location000000000
RouteCounty Highway 0
CountyClinton County
StateIowa
Coordinates41.86261, -90.42256
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior 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 rating98 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span38 ft (11.7 m)
Deck width31 ft (9.4 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 closed3.7 mi (6 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 345th Avenue over Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is 345th Avenue over 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 February 2025.

How much traffic does 345th Avenue over Creek carry?

About 62 vehicles per day (2022 count).

How long is 345th Avenue over Creek?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.7 m) and a deck 31 ft wide.

Who owns 345th Avenue over Creek?

It is owned by the County Highway Agency.