US Bridges

FM over Maquoketa River

PoorPosted for load

Jackson County, Iowa · 084E40803 · Structure no. 000000000192440

Built
1950
75 years old
Condition
Poor
inspected April 2024
Type
Truss - Thru
Steel
Length
440 ft
1 main span
Daily traffic
330
2021 count
Owner
County
County Highway Agency

About this bridge

FM over Maquoketa River is a steel truss - thru carrying FM over Maquoketa River in Jackson County, Iowa. It was built in 1950, so it is 75 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 330 vehicles a day, roughly 21% of them trucks, projected to reach 330 by 2044. The structure is 440 ft (134.1 m) long and 22 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesFM
CrossesMaquoketa River
Location084E40803
RouteCounty Highway 0
CountyJackson County
StateIowa
Coordinates42.10157, -90.51846
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 12 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.4 US tons
Inventory rating21.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 15
Structure length440 ft (134.1 m)
Longest span250 ft (76.2 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic330 (2021)
Projected traffic330 by 2044
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Maquoketa River built?

It was built in 1950, making it 75 years old in 2025.

What condition is FM over Maquoketa River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does FM over Maquoketa River carry?

About 330 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is FM over Maquoketa River?

The structure is 440 ft (134.1 m) long with a longest span of 250 ft (76.2 m) and a deck 22 ft wide.

Who owns FM over Maquoketa River?

It is owned by the County Highway Agency.