US Bridges

S Concord ST over Blackhawk Creek

Fair

Scott County, Iowa · 000000000 · Structure no. 000000000002881

Built
1990
35 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
2,197
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

S Concord ST over Blackhawk Creek is a concrete continuous slab carrying S Concord ST over Blackhawk Creek in Scott County, Iowa. It was built in 1990, so it is 35 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 2,197 vehicles a day, roughly 4% of them trucks, projected to reach 2,197 by 2043. The structure is 100 ft (30.5 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS Concord ST
CrossesBlackhawk Creek
Location000000000
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.50258, -90.62424
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.8 US tons
Inventory rating32.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span40 ft (12.2 m)
Deck width44 ft (13.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,197 (2022)
Projected traffic2,197 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$70,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S Concord ST over Blackhawk Creek built?

It was built in 1990, making it 35 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 2,197 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is S Concord ST over Blackhawk Creek?

The structure is 100 ft (30.5 m) long with a longest span of 40 ft (12.2 m) and a deck 44 ft wide.

Who owns S Concord ST over Blackhawk Creek?

It is owned by the City or Municipal Highway Agency.