US Bridges

310th ST over Stream

Good

Cerro Gordo County, Iowa · 24000 Block of 310th St. · Structure no. 000000000366625

Built
2021
4 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

310th ST over Stream is a concrete culvert carrying 310th ST over Stream in Cerro Gordo County, Iowa. It was built in 2021, so it is 4 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15 vehicles a day, projected to reach 15 by 2044. The structure is 22 ft (6.7 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries310th ST
CrossesStream
Location24000 Block of 310th St.
RouteCounty Highway 0
CountyCerro Gordo County
StateIowa
Coordinates43.21281, -93.02778
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width46 ft (14 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 310th ST over Stream built?

It was built in 2021, making it 4 years old in 2025.

What condition is 310th ST over Stream 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 January 2024.

How much traffic does 310th ST over Stream carry?

About 15 vehicles per day (2022 count).

How long is 310th ST over Stream?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 46 ft wide.

Who owns 310th ST over Stream?

It is owned by the County Highway Agency.