US Bridges

F58 296th ST over Mosquito Creek

Good

Harrison County, Iowa · 025500525 · Structure no. 000000000176942

Built
2016
9 years old
Condition
Good
inspected December 2020
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
179 ft
3 main spans
Daily traffic
121
2022 count
Owner
County
County Highway Agency

About this bridge

F58 296th ST over Mosquito Creek is a prestressed concrete stringer/multi-beam or girder carrying F58 296th ST over Mosquito Creek in Harrison County, Iowa. It was built in 2016, so it is 9 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 121 vehicles a day, projected to reach 121 by 2043. The structure is 179 ft (54.7 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesF58 296th ST
CrossesMosquito Creek
Location025500525
RouteCity Street 0
CountyHarrison County
StateIowa
Coordinates41.57853, -95.56559
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2020
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 rating77.4 US tons
Inventory rating44.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length179 ft (54.7 m)
Longest span63 ft (19.3 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic121 (2022)
Projected traffic121 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was F58 296th ST over Mosquito Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is F58 296th ST 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 December 2020.

How much traffic does F58 296th ST over Mosquito Creek carry?

About 121 vehicles per day (2022 count).

How long is F58 296th ST over Mosquito Creek?

The structure is 179 ft (54.7 m) long with a longest span of 63 ft (19.3 m) and a deck 27 ft wide.

Who owns F58 296th ST over Mosquito Creek?

It is owned by the County Highway Agency.