US Bridges

Ia 906 EB over Mosquito Creek

Fair

Pottawattamie County, Iowa · 1.0 Mi. W of Jct. I-80 · Structure no. 000000000043160

Built
1968
57 years old
Condition
Fair
inspected September 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
366 ft
3 main spans
Daily traffic
3,900
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 906 EB over Mosquito Creek is a steel continuous girder and floorbeam system carrying Ia 906 EB over Mosquito Creek in Pottawattamie County, Iowa. It was built in 1968, so it is 57 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 3,900 vehicles a day, roughly 5% of them trucks, projected to reach 3,900 by 2043. The structure is 366 ft (111.6 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 906 EB
CrossesMosquito Creek
Location1.0 Mi. W of Jct. I-80
RouteState Highway 906
CountyPottawattamie County
StateIowa
Coordinates41.27941, -95.80459
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 rating54 US tons
Inventory rating32.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length366 ft (111.6 m)
Longest span140 ft (42.7 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2022)
Projected traffic3,900 by 2043
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byCity or Municipal 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 Ia 906 EB over Mosquito Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Ia 906 EB 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 September 2023.

How much traffic does Ia 906 EB over Mosquito Creek carry?

About 3,900 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Ia 906 EB over Mosquito Creek?

The structure is 366 ft (111.6 m) long with a longest span of 140 ft (42.7 m) and a deck 35 ft wide.

Who owns Ia 906 EB over Mosquito Creek?

It is owned by the State Highway Agency and maintained by the City or Municipal Highway Agency.