US Bridges

Ia 141 over Mosquito Creek

Good

Guthrie County, Iowa · 1.0 Mi. W of Jct. Ia 4 · Structure no. 000000000026331

Built
1996
29 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
198 ft
3 main spans
Daily traffic
2,160
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 141 over Mosquito Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 141 over Mosquito Creek in Guthrie 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 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 2,160 vehicles a day, roughly 19% of them trucks, projected to reach 2,160 by 2043. The structure is 198 ft (60.4 m) long and 43 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIa 141
CrossesMosquito Creek
Location1.0 Mi. W of Jct. Ia 4
RouteState Highway 141
CountyGuthrie County
StateIowa
Coordinates41.84772, -94.38806
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length198 ft (60.4 m)
Longest span80 ft (24.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,160 (2023)
Projected traffic2,160 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

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 Ia 141 over Mosquito Creek built?

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

What condition is Ia 141 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 March 2023.

How much traffic does Ia 141 over Mosquito Creek carry?

About 2,160 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is Ia 141 over Mosquito Creek?

The structure is 198 ft (60.4 m) long with a longest span of 80 ft (24.4 m) and a deck 43 ft wide.

Who owns Ia 141 over Mosquito Creek?

It is owned by the State Highway Agency.