US Bridges

NB I-35 over West Creek

Fair

Clarke County, Iowa · 2.5 Mi. North of Ia 152 · Structure no. 000000000020241

Built
2012
13 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
264 ft
3 main spans
Daily traffic
9,400
2022 count
Owner
State
State Highway Agency

About this bridge

NB I-35 over West Creek is a steel continuous stringer/multi-beam or girder carrying NB I-35 over West Creek in Clarke County, Iowa. It was built in 2012, so it is 13 years old, younger 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 9,400 vehicles a day, roughly 31% of them trucks, projected to reach 9,400 by 2044. The structure is 264 ft (80.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB I-35
CrossesWest Creek
Location2.5 Mi. North of Ia 152
RouteInterstate 35
CountyClarke County
StateIowa
Coordinates41.1052, -93.77822
Functional classRural Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length264 ft (80.5 m)
Longest span104 ft (31.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,400 (2022)
Projected traffic9,400 by 2044
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 NB I-35 over West Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is NB I-35 over West 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 May 2024.

How much traffic does NB I-35 over West Creek carry?

About 9,400 vehicles per day (2022 count), of which roughly 31% are trucks.

How long is NB I-35 over West Creek?

The structure is 264 ft (80.5 m) long with a longest span of 104 ft (31.7 m) and a deck 43 ft wide.

Who owns NB I-35 over West Creek?

It is owned by the State Highway Agency.