US Bridges

298th Street over Mosquito Creek

Good

Pottawattamie County, Iowa · 077413004 · Structure no. 000000000290181

Built
1998
27 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
213 ft
3 main spans
Daily traffic
2,051
2021 count
Owner
County
County Highway Agency

About this bridge

298th Street over Mosquito Creek is a prestressed concrete stringer/multi-beam or girder carrying 298th Street over Mosquito Creek in Pottawattamie County, Iowa. It was built in 1998, so it is 27 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,051 vehicles a day, roughly 11% of them trucks, projected to reach 2,051 by 2043. The structure is 213 ft (64.9 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Carries298th Street
CrossesMosquito Creek
Location077413004
RouteCounty Highway 0
StateIowa
Coordinates41.44315, -95.61211
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.1 US tons
Inventory rating39.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span95 ft (29 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,051 (2021)
Projected traffic2,051 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 298th Street over Mosquito Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is 298th Street over Mosquito 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 May 2023.

How much traffic does 298th Street over Mosquito Creek carry?

About 2,051 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is 298th Street over Mosquito Creek?

The structure is 213 ft (64.9 m) long with a longest span of 95 ft (29 m) and a deck 39 ft wide.

Who owns 298th Street over Mosquito Creek?

It is owned by the County Highway Agency.