US Bridges

US 30 EB over Unnamed Creek

Good

Benton County, Iowa · 1.2 Mi. W. of Co. Rd. V66 · Structure no. 000000000700495

Built
2022
3 years old
Condition
Good
inspected February 2023
Type
Slab
Concrete Continuous
Length
91 ft
3 main spans
Daily traffic
3,800
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 EB over Unnamed Creek is a concrete continuous slab carrying US 30 EB over Unnamed Creek in Benton County, Iowa. It was built in 2022, so it is 3 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 3,800 vehicles a day, roughly 20% of them trucks, projected to reach 3,800 by 2042. The structure is 91 ft (27.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 30 EB
CrossesUnnamed Creek
Location1.2 Mi. W. of Co. Rd. V66
RouteU.S. Route 30
CountyBenton County
StateIowa
Coordinates41.96337, -92.10833
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length91 ft (27.7 m)
Longest span35 ft (10.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2022)
Projected traffic3,800 by 2042
Trucks20%
Lanes on structure2
Traffic directionOne-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 EB over Unnamed Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is US 30 EB over Unnamed Creek 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 February 2023.

How much traffic does US 30 EB over Unnamed Creek carry?

About 3,800 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is US 30 EB over Unnamed Creek?

The structure is 91 ft (27.7 m) long with a longest span of 35 ft (10.7 m) and a deck 43 ft wide.

Who owns US 30 EB over Unnamed Creek?

It is owned by the State Highway Agency.