US Bridges

Ia 191 over Mosquito Creek

Fair

Shelby County, Iowa · 2.0 Mi. S of Jct. Ia 37 · Structure no. 000000000048121

Built
1991
34 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
3 main spans
Daily traffic
790
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 191 over Mosquito Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 191 over Mosquito Creek in Shelby County, Iowa. It was built in 1991, so it is 34 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 6 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 790 vehicles a day, roughly 29% of them trucks, projected to reach 790 by 2044. The structure is 192 ft (58.5 m) long and 39 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesIa 191
CrossesMosquito Creek
Location2.0 Mi. S of Jct. Ia 37
RouteState Highway 191
CountyShelby County
StateIowa
Coordinates41.75881, -95.45971
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating89 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span82 ft (25 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic790 (2022)
Projected traffic790 by 2044
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 191 over Mosquito Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Ia 191 over Mosquito Creek 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 May 2024.

How much traffic does Ia 191 over Mosquito Creek carry?

About 790 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is Ia 191 over Mosquito Creek?

The structure is 192 ft (58.5 m) long with a longest span of 82 ft (25 m) and a deck 39 ft wide.

Who owns Ia 191 over Mosquito Creek?

It is owned by the State Highway Agency.