US Bridges

Congress ST over Shell Rock River

Fair

Floyd County, Iowa · 096180707 · Structure no. 000000000024901

Built
2008
17 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
308 ft
3 main spans
Daily traffic
4,036
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Congress ST over Shell Rock River is a prestressed concrete stringer/multi-beam or girder carrying Congress ST over Shell Rock River in Floyd County, Iowa. It was built in 2008, so it is 17 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 4,036 vehicles a day, projected to reach 4,036 by 2044. The structure is 308 ft (93.9 m) long and 40 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCongress ST
CrossesShell Rock River
Location096180707
RouteCity Street 0
CountyFloyd County
StateIowa
Coordinates43.14269, -93.01019
Functional classRural Major 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.2 US tons
Inventory rating42.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length308 ft (93.9 m)
Longest span106 ft (32.3 m)
Deck width40 ft (12.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,036 (2022)
Projected traffic4,036 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Congress ST over Shell Rock River built?

It was built in 2008, making it 17 years old in 2025.

What condition is Congress ST over Shell Rock River 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 March 2024.

How much traffic does Congress ST over Shell Rock River carry?

About 4,036 vehicles per day (2022 count).

How long is Congress ST over Shell Rock River?

The structure is 308 ft (93.9 m) long with a longest span of 106 ft (32.3 m) and a deck 40 ft wide.

Who owns Congress ST over Shell Rock River?

It is owned by the City or Municipal Highway Agency.