US Bridges

120th Ave over Creek

Good

Clinton County, Iowa · 082E13302 · Structure no. 000000000123051

Built
2022
3 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

120th Ave over Creek is a steel stringer/multi-beam or girder carrying 120th Ave over Creek in Clinton County, Iowa. It was built in 2022, so it is 3 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 35 vehicles a day, projected to reach 35 by 2044. The structure is 34 ft (10.5 m) long and 31 ft wide.

Carries120th Ave
CrossesCreek
Location082E13302
RouteCounty Highway 0
StateIowa
Coordinates41.85981, -90.85925
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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating89.3 US tons
Inventory rating68.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length34 ft (10.5 m)
Longest span31 ft (9.4 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)
Projected traffic35 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 120th Ave over Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is 120th Ave 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 March 2024.

How much traffic does 120th Ave over Creek carry?

About 35 vehicles per day (2022 count).

How long is 120th Ave over Creek?

The structure is 34 ft (10.5 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.

Who owns 120th Ave over Creek?

It is owned by the County Highway Agency.