US Bridges

FM over S Fork Maquoketa River

PoorClosed to traffic

Jackson County, Iowa · 084E11303 · Structure no. 000000000191921

Built
1982
43 years old
Condition
Poor
inspected January 2025
Type
Truss - Thru
Steel
Length
171 ft
1 main span
Daily traffic
80
2021 count
Owner
County
County Highway Agency

About this bridge

FM over S Fork Maquoketa River is a steel truss - thru carrying FM over S Fork Maquoketa River in Jackson County, Iowa. It was built in 1982, so it is 43 years old, younger 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 2 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: closed to all traffic.

It carries about 80 vehicles a day, projected to reach 80 by 2045. The structure is 171 ft (52.1 m) long and 21 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesFM
CrossesS Fork Maquoketa River
Location084E11303
RouteCounty Highway 0
StateIowa
Coordinates42.09007, -90.79746
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 6 months
Operating statusClosed to all traffic
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry0: Immediate repair necessary to put back in service
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length171 ft (52.1 m)
Longest span130 ft (39.6 m)
Deck width21 ft (6.4 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deck14 ft (4.1 m)

Traffic and service

Average daily traffic80 (2021)
Projected traffic80 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over S Fork Maquoketa River built?

It was built in 1982, making it 43 years old in 2025.

What condition is FM over S Fork 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 January 2025.

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

About 80 vehicles per day (2021 count).

How long is FM over S Fork Maquoketa River?

The structure is 171 ft (52.1 m) long with a longest span of 130 ft (39.6 m) and a deck 21 ft wide.

Who owns FM over S Fork Maquoketa River?

It is owned by the County Highway Agency.