US Bridges

Old Ia 375 over Mosquito Creek & RR

Fair

Pottawattamie County, Iowa · 000000000 · Structure no. 000000000002686

Built
1996
29 years old
Condition
Fair
inspected July 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
571 ft
4 main spans
Daily traffic
6,622
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old Ia 375 over Mosquito Creek & RR is a steel continuous girder and floorbeam system carrying Old Ia 375 over Mosquito Creek & RR in Pottawattamie County, Iowa. It was built in 1996, so it is 29 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 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 6,622 vehicles a day, roughly 9% of them trucks, projected to reach 6,622 by 2043. The structure is 571 ft (174 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesOld Ia 375
CrossesMosquito Creek & RR
Location000000000
RouteCity Street 0
CountyPottawattamie County
StateIowa
Coordinates41.22904, -95.82687
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.7 US tons
Inventory rating38.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length571 ft (174 m)
Longest span142 ft (43.3 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,622 (2022)
Projected traffic6,622 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal 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 Old Ia 375 over Mosquito Creek & RR built?

It was built in 1996, making it 29 years old in 2025.

What condition is Old Ia 375 over Mosquito Creek & RR 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 Old Ia 375 over Mosquito Creek & RR carry?

About 6,622 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Old Ia 375 over Mosquito Creek & RR?

The structure is 571 ft (174 m) long with a longest span of 142 ft (43.3 m) and a deck 37 ft wide.

Who owns Old Ia 375 over Mosquito Creek & RR?

It is owned by the City or Municipal Highway Agency.