N Bankston RD over Unnamed Stream

Good

Dubuque County, Iowa · 089021203 · Structure no. 000000000147561

Built: 2022; 3 years old
Condition: Good; inspected December 2022
Type: Slab; Concrete
Length: 52 ft; 1 main span
Daily traffic: 88; 2022 count
Owner: County; County Highway Agency

About this bridge

N Bankston RD over Unnamed Stream is a concrete slab carrying N Bankston RD over Unnamed Stream in Dubuque County, Iowa. It was built in 2022, so it is 3 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, projected to reach 88 by 2043. The structure is 52 ft (15.9 m) long and 33 ft wide.

Location

Open in Google Maps

CarriesN Bankston RD

CrossesUnnamed Stream

Location089021203

RouteCounty Highway 0

CountyDubuque County

StateIowa

Coordinates42.53726, -91.03012

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.

Component	Rating	Meaning
Deck	8 Very Good	No problems noted.
Superstructure	8 Very Good	No problems noted.
Substructure	8 Very Good	No problems noted.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionDecember 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 rating65.7 US tons

Inventory rating50.7 US tons

Structure

Structure typeSlab

MaterialConcrete

DeckConcrete, cast-in-place

Main spans1

Design loadHL 93

Structure length52 ft (15.9 m)

Longest span50 ft (15.2 m)

Deck width33 ft (10.1 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88 (2022)

Projected traffic88 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 N Bankston RD over Unnamed Stream built?

It was built in 2022, making it 3 years old in 2025.

What condition is N Bankston RD over Unnamed Stream 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 December 2022.

How much traffic does N Bankston RD over Unnamed Stream carry?

About 88 vehicles per day (2022 count).

How long is N Bankston RD over Unnamed Stream?

The structure is 52 ft (15.9 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns N Bankston RD over Unnamed Stream?

It is owned by the County Highway Agency.