US Bridges

Flannagan RD over N Fork Little Maquketa

Good

Dubuque County, Iowa · 9001 15 4050 · Structure no. 000000000148171

Built
2016
9 years old
Condition
Good
inspected September 2022
Type
Slab
Concrete Continuous
Length
83 ft
3 main spans
Daily traffic
88
2022 count
Owner
County
County Highway Agency

About this bridge

Flannagan RD over N Fork Little Maquketa is a concrete continuous slab carrying Flannagan RD over N Fork Little Maquketa in Dubuque County, Iowa. It was built in 2016, so it is 9 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 88 vehicles a day, roughly 17% of them trucks, projected to reach 88 by 2043. The structure is 83 ft (25.3 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFlannagan RD
CrossesN Fork Little Maquketa
Location9001 15 4050
RouteCounty Highway 0
StateIowa
Coordinates42.60936, -90.94866
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length83 ft (25.3 m)
Longest span31 ft (9.4 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88 (2022)
Projected traffic88 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Flannagan RD over N Fork Little Maquketa built?

It was built in 2016, making it 9 years old in 2025.

What condition is Flannagan RD over N Fork Little Maquketa in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2022.

How much traffic does Flannagan RD over N Fork Little Maquketa carry?

About 88 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is Flannagan RD over N Fork Little Maquketa?

The structure is 83 ft (25.3 m) long with a longest span of 31 ft (9.4 m) and a deck 33 ft wide.

Who owns Flannagan RD over N Fork Little Maquketa?

It is owned by the County Highway Agency.