US Bridges

US 61 Off Ramp over Granger Creek

Good

Dubuque County, Iowa · US 61 Connector · Structure no. 000000000700940

Built
2019
6 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
266 ft
3 main spans
Daily traffic
756
2022 count
Owner
County
County Highway Agency

About this bridge

US 61 Off Ramp over Granger Creek is a steel continuous stringer/multi-beam or girder carrying US 61 Off Ramp over Granger Creek in Dubuque County, Iowa. It was built in 2019, so it is 6 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 756 vehicles a day, roughly 8% of them trucks, projected to reach 756 by 2043. The structure is 266 ft (81.2 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 61 Off Ramp
CrossesGranger Creek
LocationUS 61 Connector
RouteCounty Highway 0
CountyDubuque County
StateIowa
Coordinates42.42845, -90.68859
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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating51 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length266 ft (81.2 m)
Longest span110 ft (33.5 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic756 (2022)
Projected traffic756 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 US 61 Off Ramp over Granger Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is US 61 Off Ramp over Granger Creek 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 November 2022.

How much traffic does US 61 Off Ramp over Granger Creek carry?

About 756 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is US 61 Off Ramp over Granger Creek?

The structure is 266 ft (81.2 m) long with a longest span of 110 ft (33.5 m) and a deck 39 ft wide.

Who owns US 61 Off Ramp over Granger Creek?

It is owned by the County Highway Agency.