US Bridges

US 30 EB over Ia 1

Good

Linn County, Iowa · US 30 and Ia 1 Intchg · Structure no. 000000000700520

Built
2019
6 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
197 ft
3 main spans
Daily traffic
2,165
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 EB over Ia 1 is a prestressed concrete stringer/multi-beam or girder carrying US 30 EB over Ia 1 in Linn 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 2,165 vehicles a day, roughly 23% of them trucks, projected to reach 2,165 by 2044. The structure is 197 ft (60 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
CrossesIa 1
LocationUS 30 and Ia 1 Intchg
RouteU.S. Route 30
CountyLinn County
StateIowa
Coordinates41.91175, -91.42881
Functional classUrban Other Principal Arterial

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.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable 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 spans3
Design loadHL 93
Structure length197 ft (60 m)
Longest span112 ft (34.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,165 (2022)
Projected traffic2,165 by 2044
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 30 EB over Ia 1 built?

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

What condition is US 30 EB over Ia 1 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 EB over Ia 1 carry?

About 2,165 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is US 30 EB over Ia 1?

The structure is 197 ft (60 m) long with a longest span of 112 ft (34.1 m) and a deck 43 ft wide.

Who owns US 30 EB over Ia 1?

It is owned by the State Highway Agency.