US Bridges

Ia 3 over So Fork Maquoketa River

Fair

Fayette County, Iowa · 4.8 Mi. W of Jct. Ia 187 · Structure no. 000000000024520

Built
1925
100 years old, rebuilt 1959
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
82 ft
3 main spans
Daily traffic
1,400
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 3 over So Fork Maquoketa River is a concrete continuous slab carrying Ia 3 over So Fork Maquoketa River in Fayette County, Iowa. It was built in 1925 and reconstructed in 1959, so it is 100 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.

It carries about 1,400 vehicles a day, roughly 16% of them trucks, projected to reach 1,400 by 2043. The structure is 82 ft (25 m) long and 36 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesIa 3
CrossesSo Fork Maquoketa River
Location4.8 Mi. W of Jct. Ia 187
RouteState Highway 3
CountyFayette County
StateIowa
Coordinates42.68676, -91.73931
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.4 US tons
Inventory rating31.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length82 ft (25 m)
Longest span31 ft (9.4 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2022)
Projected traffic1,400 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 3 over So Fork Maquoketa River built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1959.

What condition is Ia 3 over So Fork Maquoketa River 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 November 2023.

How much traffic does Ia 3 over So Fork Maquoketa River carry?

About 1,400 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Ia 3 over So Fork Maquoketa River?

The structure is 82 ft (25 m) long with a longest span of 31 ft (9.4 m) and a deck 36 ft wide.

Who owns Ia 3 over So Fork Maquoketa River?

It is owned by the State Highway Agency.