US Bridges

EB Ia 930 over US 30

Fair

Boone County, Iowa · At Jct. U.S. 30 · Structure no. 000000000015225

Built
1972
53 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
407 ft
4 main spans
Daily traffic
2,050
2022 count
Owner
State
State Highway Agency

About this bridge

EB Ia 930 over US 30 is a steel continuous stringer/multi-beam or girder carrying EB Ia 930 over US 30 in Boone County, Iowa. It was built in 1972, so it is 53 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,050 vehicles a day, roughly 4% of them trucks, projected to reach 2,050 by 2042. The structure is 407 ft (124.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEB Ia 930
CrossesUS 30
LocationAt Jct. U.S. 30
RouteState Highway 930
CountyBoone County
StateIowa
Coordinates42.02219, -93.72572
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.4 US tons
Inventory rating39.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length407 ft (124.1 m)
Longest span130 ft (39.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,050 (2022)
Projected traffic2,050 by 2042
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
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 EB Ia 930 over US 30 built?

It was built in 1972, making it 53 years old in 2025.

What condition is EB Ia 930 over US 30 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does EB Ia 930 over US 30 carry?

About 2,050 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is EB Ia 930 over US 30?

The structure is 407 ft (124.1 m) long with a longest span of 130 ft (39.6 m) and a deck 43 ft wide.

Who owns EB Ia 930 over US 30?

It is owned by the State Highway Agency.