US Bridges

1st ST SW over Shell Rock River

Good

Floyd County, Iowa · 096180707 · Structure no. 000000000008701

Built
2020
5 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
158 ft
1 main span
Daily traffic
513
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

1st ST SW over Shell Rock River is a prestressed concrete stringer/multi-beam or girder carrying 1st ST SW over Shell Rock River in Floyd County, Iowa. It was built in 2020, so it is 5 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 513 vehicles a day, projected to reach 513 by 2043. The structure is 158 ft (48.2 m) long and 43 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
Carries1st ST SW
CrossesShell Rock River
Location096180707
RouteCity Street 0
CountyFloyd County
StateIowa
Coordinates43.14182, -93.01004
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length158 ft (48.2 m)
Longest span155 ft (47.2 m)
Deck width43 ft (13.2 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic513 (2022)
Projected traffic513 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 1st ST SW over Shell Rock River built?

It was built in 2020, making it 5 years old in 2025.

What condition is 1st ST SW over Shell Rock River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does 1st ST SW over Shell Rock River carry?

About 513 vehicles per day (2022 count).

How long is 1st ST SW over Shell Rock River?

The structure is 158 ft (48.2 m) long with a longest span of 155 ft (47.2 m) and a deck 43 ft wide.

Who owns 1st ST SW over Shell Rock River?

It is owned by the City or Municipal Highway Agency.