US Bridges

Ia 37 over Mosquito Creek

Good

Shelby County, Iowa · 0.6 Mi. E of Jct. Ia 191 · Structure no. 000000000047871

Built
2001
24 years old
Condition
Good
inspected February 2023
Type
Slab
Concrete Continuous
Length
134 ft
3 main spans
Daily traffic
1,300
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 37 over Mosquito Creek is a concrete continuous slab carrying Ia 37 over Mosquito Creek in Shelby County, Iowa. It was built in 2001, so it is 24 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 1,300 vehicles a day, roughly 16% of them trucks, projected to reach 1,300 by 2042. The structure is 134 ft (40.8 m) long and 50 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesIa 37
CrossesMosquito Creek
Location0.6 Mi. E of Jct. Ia 191
RouteState Highway 37
CountyShelby County
StateIowa
Coordinates41.77661, -95.41111
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 inspectionFebruary 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length134 ft (40.8 m)
Longest span51 ft (15.5 m)
Deck width50 ft (15.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2022)
Projected traffic1,300 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 37 over Mosquito Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is Ia 37 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 February 2023.

How much traffic does Ia 37 over Mosquito Creek carry?

About 1,300 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Ia 37 over Mosquito Creek?

The structure is 134 ft (40.8 m) long with a longest span of 51 ft (15.5 m) and a deck 50 ft wide.

Who owns Ia 37 over Mosquito Creek?

It is owned by the State Highway Agency.