FM over N. Fork Little Maquoketa

Fair

Dubuque County, Iowa · 090E11902 · Structure no. 000000000147791

Built: 2001; 24 years old
Condition: Fair; inspected April 2023
Type: Slab; Concrete Continuous
Length: 100 ft; 3 main spans
Daily traffic: 240; 2021 count
Owner: County; County Highway Agency

About this bridge

FM over N. Fork Little Maquoketa is a concrete continuous slab carrying FM over N. Fork Little Maquoketa in Dubuque County, Iowa. It was built in 2001, so it is 24 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 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 240 vehicles a day, projected to reach 240 by 2043. The structure is 100 ft (30.5 m) long and 32 ft wide.

Location

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CarriesFM

CrossesN. Fork Little Maquoketa

Location090E11902

RouteCounty Highway 0

CountyDubuque County

StateIowa

Coordinates42.5956, -90.89617

Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	7 Good	Some minor problems.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionApril 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating88.6 US tons

Inventory rating53.1 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length100 ft (30.5 m)

Longest span39 ft (11.9 m)

Deck width32 ft (9.8 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2021)

Projected traffic240 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed—

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 N. Fork Little Maquoketa built?

It was built in 2001, making it 24 years old in 2025.

What condition is FM over N. Fork Little Maquoketa 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 April 2023.

How much traffic does FM over N. Fork Little Maquoketa carry?

About 240 vehicles per day (2021 count).

How long is FM over N. Fork Little Maquoketa?

The structure is 100 ft (30.5 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns FM over N. Fork Little Maquoketa?

It is owned by the County Highway Agency.