US Bridges

Blackhawk Trail over US 61

Fair

Scott County, Iowa · 2.1 Mi. N of Jct. I-80 · Structure no. 000000000604690

Built
1981
44 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
273 ft
4 main spans
Daily traffic
2,963
2022 count
Owner
State
State Highway Agency

About this bridge

Blackhawk Trail over US 61 is a prestressed concrete stringer/multi-beam or girder carrying Blackhawk Trail over US 61 in Scott County, Iowa. It was built in 1981, so it is 44 years old, younger 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,963 vehicles a day, roughly 10% of them trucks, projected to reach 2,963 by 2044. The structure is 273 ft (83.2 m) long and 71 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBlackhawk Trail
CrossesUS 61
Location2.1 Mi. N of Jct. I-80
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.62559, -90.56827
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99.8 US tons
Inventory rating39.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length273 ft (83.2 m)
Longest span92 ft (28 m)
Deck width71 ft (21.6 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,963 (2022)
Projected traffic2,963 by 2044
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Blackhawk Trail over US 61 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Blackhawk Trail over US 61 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 February 2024.

How much traffic does Blackhawk Trail over US 61 carry?

About 2,963 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Blackhawk Trail over US 61?

The structure is 273 ft (83.2 m) long with a longest span of 92 ft (28 m) and a deck 71 ft wide.

Who owns Blackhawk Trail over US 61?

It is owned by the State Highway Agency.