US Bridges

Local over Curran Branch

FairPosted for load

Dubuque County, Iowa · 087010104 · Structure no. 000000000145900

Built
1938
87 years old, rebuilt 1965
Condition
Fair
inspected April 2024
Type
Truss - Thru
Steel
Length
61 ft
1 main span
Daily traffic
40
2021 count
Owner
County
County Highway Agency

About this bridge

Local over Curran Branch is a steel truss - thru carrying Local over Curran Branch in Dubuque County, Iowa. It was built in 1938 and reconstructed in 1965, so it is 87 years old, older 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. Its operating status is: posted for other load-capacity restriction.

It carries about 40 vehicles a day, projected to reach 40 by 2044. The structure is 61 ft (18.6 m) long and 19 ft wide.

Location

Open in Google Maps
CarriesLocal
CrossesCurran Branch
Location087010104
RouteCounty Highway 0
CountyDubuque County
StateIowa
Coordinates42.36793, -90.91778
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusPosted for other load-capacity restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52 US tons
Inventory rating36.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 10
Structure length61 ft (18.6 m)
Longest span60 ft (18.3 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2021)
Projected traffic40 by 2044
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Curran Branch built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1965.

What condition is Local over Curran Branch 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 2024.

How much traffic does Local over Curran Branch carry?

About 40 vehicles per day (2021 count).

How long is Local over Curran Branch?

The structure is 61 ft (18.6 m) long with a longest span of 60 ft (18.3 m) and a deck 19 ft wide.

Who owns Local over Curran Branch?

It is owned by the County Highway Agency.