US Bridges

FM over S Fork Maquoketa River

FairPosted for load

Jackson County, Iowa · 085E11905 · Structure no. 000000000193210

Built
1954
71 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
410 ft
5 main spans
Daily traffic
510
2021 count
Owner
County
County Highway Agency

About this bridge

FM over S Fork Maquoketa River is a steel continuous stringer/multi-beam or girder carrying FM over S Fork Maquoketa River in Jackson County, Iowa. It was built in 1954, so it is 71 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 510 vehicles a day, roughly 22% of them trucks, projected to reach 510 by 2043. The structure is 410 ft (125 m) long and 22 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesFM
CrossesS Fork Maquoketa River
Location085E11905
RouteCounty Highway 0
CountyJackson County
StateIowa
Coordinates42.16324, -90.8948
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.5 US tons
Inventory rating17.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length410 ft (125 m)
Longest span117 ft (35.7 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic510 (2021)
Projected traffic510 by 2043
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over S Fork Maquoketa River built?

It was built in 1954, making it 71 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 510 vehicles per day (2021 count), of which roughly 22% are trucks.

How long is FM over S Fork Maquoketa River?

The structure is 410 ft (125 m) long with a longest span of 117 ft (35.7 m) and a deck 22 ft wide.

Who owns FM over S Fork Maquoketa River?

It is owned by the County Highway Agency.