US Bridges

Derby Grange RD over Cloie Branch

Good

Dubuque County, Iowa · 089E20805 · Structure no. 000000000147241

Built
2011
14 years old
Condition
Good
inspected November 2022
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
638
2022 count
Owner
County
County Highway Agency

About this bridge

Derby Grange RD over Cloie Branch is a concrete culvert carrying Derby Grange RD over Cloie Branch in Dubuque County, Iowa. It was built in 2011, so it is 14 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 638 vehicles a day, projected to reach 638 by 2043. The structure is 24 ft (7.3 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesDerby Grange RD
CrossesCloie Branch
Location089E20805
RouteCounty Highway 0
CountyDubuque County
StateIowa
Coordinates42.53533, -90.76023
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width40 ft (12.2 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic638 (2022)
Projected traffic638 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Derby Grange RD over Cloie Branch built?

It was built in 2011, making it 14 years old in 2025.

What condition is Derby Grange RD over Cloie Branch 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 Derby Grange RD over Cloie Branch carry?

About 638 vehicles per day (2022 count).

How long is Derby Grange RD over Cloie Branch?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 40 ft wide.

Who owns Derby Grange RD over Cloie Branch?

It is owned by the County Highway Agency.