US Bridges

S Concord ST over Blackhawk Creek

Fair

Scott County, Iowa · 000000000 · Structure no. 000000000002871

Built
1985
40 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
35 ft
1 main span
Daily traffic
1,925
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

S Concord ST over Blackhawk Creek is a concrete slab carrying S Concord ST over Blackhawk Creek in Scott County, Iowa. It was built in 1985, so it is 40 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 5 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 1,925 vehicles a day, projected to reach 1,925 by 2043. The structure is 35 ft (10.7 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesS Concord ST
CrossesBlackhawk Creek
Location000000000
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.51539, -90.62398
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating62.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span34 ft (10.4 m)
Deck width43 ft (13.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,925 (2022)
Projected traffic1,925 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$60,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S Concord ST over Blackhawk Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is S Concord 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 Concord ST over Blackhawk Creek carry?

About 1,925 vehicles per day (2022 count).

How long is S Concord ST over Blackhawk Creek?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 43 ft wide.

Who owns S Concord ST over Blackhawk Creek?

It is owned by the City or Municipal Highway Agency.