US Bridges

SB US 151-IA 13 over US 30

Fair

Linn County, Iowa · At Jct. U.S. 30 · Structure no. 000000000033612

Built
1975
50 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
238 ft
4 main spans
Daily traffic
1,140
2022 count
Owner
State
State Highway Agency

About this bridge

SB US 151-IA 13 over US 30 is a steel continuous stringer/multi-beam or girder carrying SB US 151-IA 13 over US 30 in Linn County, Iowa. It was built in 1975, so it is 50 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 1,140 vehicles a day, roughly 7% of them trucks, projected to reach 1,140 by 2044. The structure is 238 ft (72.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB US 151-IA 13
CrossesUS 30
LocationAt Jct. U.S. 30
RouteState Highway 13
CountyLinn County
StateIowa
Coordinates41.92659, -91.54229
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48.9 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length238 ft (72.5 m)
Longest span72 ft (21.9 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,140 (2022)
Projected traffic1,140 by 2044
Trucks7%
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 SB US 151-IA 13 over US 30 built?

It was built in 1975, making it 50 years old in 2025.

What condition is SB US 151-IA 13 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 September 2024.

How much traffic does SB US 151-IA 13 over US 30 carry?

About 1,140 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SB US 151-IA 13 over US 30?

The structure is 238 ft (72.5 m) long with a longest span of 72 ft (21.9 m) and a deck 43 ft wide.

Who owns SB US 151-IA 13 over US 30?

It is owned by the State Highway Agency.