US Bridges

Local over Mosquito Creek

FairPosted for load

Shelby County, Iowa · 079400911 · Structure no. 000000000305730

Built
1960
65 years old
Condition
Fair
inspected March 2023
Type
Truss - Thru
Steel
Length
180 ft
1 main span
Daily traffic
51
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Mosquito Creek is a steel truss - thru carrying Local over Mosquito Creek in Shelby County, Iowa. It was built in 1960, so it is 65 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 51 vehicles a day, projected to reach 51 by 2043. The structure is 180 ft (54.9 m) long and 17 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLocal
CrossesMosquito Creek
Location079400911
RouteCounty Highway 0
CountyShelby County
StateIowa
Coordinates41.66782, -95.50411
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating15 US tons
Inventory rating12 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+3 approach)
Design loadUnknown
Structure length180 ft (54.9 m)
Longest span70 ft (21.3 m)
Deck width17 ft (5.1 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2022)
Projected traffic51 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Mosquito Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Local 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 March 2023.

How much traffic does Local over Mosquito Creek carry?

About 51 vehicles per day (2022 count).

How long is Local over Mosquito Creek?

The structure is 180 ft (54.9 m) long with a longest span of 70 ft (21.3 m) and a deck 17 ft wide.

Who owns Local over Mosquito Creek?

It is owned by the County Highway Agency.