US Bridges

S Clark ST over Blackhawk Creek

Fair

Scott County, Iowa · 000000000 · Structure no. 000000000003230

Built
1950
75 years old, rebuilt 2009
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
2,351
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

S Clark ST over Blackhawk Creek is a steel stringer/multi-beam or girder carrying S Clark ST over Blackhawk Creek in Scott County, Iowa. It was built in 1950 and reconstructed in 2009, so it is 75 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 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 2,351 vehicles a day, projected to reach 2,351 by 2043. The structure is 56 ft (17.1 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesS Clark ST
CrossesBlackhawk Creek
Location000000000
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.51776, -90.62248
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length56 ft (17.1 m)
Longest span49 ft (14.9 m)
Deck width44 ft (13.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,351 (2022)
Projected traffic2,351 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$270,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S Clark ST over Blackhawk Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2009.

What condition is S Clark ST over Blackhawk Creek 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 June 2023.

How much traffic does S Clark ST over Blackhawk Creek carry?

About 2,351 vehicles per day (2022 count).

How long is S Clark ST over Blackhawk Creek?

The structure is 56 ft (17.1 m) long with a longest span of 49 ft (14.9 m) and a deck 44 ft wide.

Who owns S Clark ST over Blackhawk Creek?

It is owned by the City or Municipal Highway Agency.