US Bridges

I 880 WB over Mosquito Creek

Fair

Pottawattamie County, Iowa · 0.5 Mi. E of Jct. Ia 191 · Structure no. 000000000044530

Built
1966
59 years old
Condition
Fair
inspected July 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
286 ft
3 main spans
Daily traffic
2,900
2022 count
Owner
State
State Highway Agency

About this bridge

I 880 WB over Mosquito Creek is a steel continuous girder and floorbeam system carrying I 880 WB over Mosquito Creek in Pottawattamie County, Iowa. It was built in 1966, so it is 59 years old, older 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 5 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 2,900 vehicles a day, roughly 37% of them trucks, projected to reach 2,900 by 2043. The structure is 286 ft (87.2 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 880 WB
CrossesMosquito Creek
Location0.5 Mi. E of Jct. Ia 191
RouteInterstate 880
CountyPottawattamie County
StateIowa
Coordinates41.49901, -95.59013
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.9 US tons
Inventory rating34.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length286 ft (87.2 m)
Longest span109 ft (33.2 m)
Deck width41 ft (12.5 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2022)
Projected traffic2,900 by 2043
Trucks37%
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 I 880 WB over Mosquito Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is I 880 WB over Mosquito 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 July 2023.

How much traffic does I 880 WB over Mosquito Creek carry?

About 2,900 vehicles per day (2022 count), of which roughly 37% are trucks.

How long is I 880 WB over Mosquito Creek?

The structure is 286 ft (87.2 m) long with a longest span of 109 ft (33.2 m) and a deck 41 ft wide.

Who owns I 880 WB over Mosquito Creek?

It is owned by the State Highway Agency.