US Bridges

US 30 over Unnamed Stream

Good

Cedar County, Iowa · 4.8 Mi. E US30/IA1INTCHG · Structure no. 000000000700565

Built
2019
6 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
5,500
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over Unnamed Stream is a concrete culvert carrying US 30 over Unnamed Stream in Cedar County, Iowa. It was built in 2019, so it is 6 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 5,500 vehicles a day, roughly 15% of them trucks, projected to reach 5,500 by 2044. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 30
CrossesUnnamed Stream
Location4.8 Mi. E US30/IA1INTCHG
RouteU.S. Route 30
CountyCedar County
StateIowa
Coordinates41.9187, -91.34229
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating43.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length26 ft (7.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2022)
Projected traffic5,500 by 2044
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 30 over Unnamed Stream built?

It was built in 2019, making it 6 years old in 2025.

What condition is US 30 over Unnamed 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 April 2024.

How much traffic does US 30 over Unnamed Stream carry?

About 5,500 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is US 30 over Unnamed Stream?

The structure is 26 ft (7.8 m) long with a longest span of 10 ft (3 m).

Who owns US 30 over Unnamed Stream?

It is owned by the State Highway Agency.