US Bridges

FM over S Fork Maquoketa River

Fair

Jackson County, Iowa · 084E10304 · Structure no. 000000000193251

Built
1987
38 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
375 ft
4 main spans
Daily traffic
230
2021 count
Owner
County
County Highway Agency

About this bridge

FM over S Fork Maquoketa River is a prestressed concrete stringer/multi-beam or girder carrying FM over S Fork Maquoketa River in Jackson County, Iowa. It was built in 1987, so it is 38 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 230 vehicles a day, projected to reach 230 by 2043. The structure is 375 ft (114.3 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM
CrossesS Fork Maquoketa River
Location084E10304
RouteCounty Highway 0
CountyJackson County
StateIowa
Coordinates42.11958, -90.8299
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
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 statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating73.2 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length375 ft (114.3 m)
Longest span97 ft (29.6 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (2021)
Projected traffic230 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over S Fork Maquoketa River built?

It was built in 1987, making it 38 years old in 2025.

What condition is FM over S 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 March 2023.

How much traffic does FM over S Fork Maquoketa River carry?

About 230 vehicles per day (2021 count).

How long is FM over S Fork Maquoketa River?

The structure is 375 ft (114.3 m) long with a longest span of 97 ft (29.6 m) and a deck 32 ft wide.

Who owns FM over S Fork Maquoketa River?

It is owned by the County Highway Agency.