US Bridges

Kirkwood Blvd over US 30

Good

Linn County, Iowa · 0.7 Mi. E of Jct. US 218 · Structure no. 000000000600600

Built
1975
50 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
272 ft
4 main spans
Daily traffic
6,394
2022 count
Owner
State
State Highway Agency

About this bridge

Kirkwood Blvd over US 30 is a prestressed concrete stringer/multi-beam or girder carrying Kirkwood Blvd 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,394 vehicles a day, roughly 7% of them trucks, projected to reach 6,394 by 2042. The structure is 272 ft (82.9 m) long and 78 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesKirkwood Blvd
CrossesUS 30
Location0.7 Mi. E of Jct. US 218
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates41.92646, -91.65678
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating87.5 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length272 ft (82.9 m)
Longest span97 ft (29.6 m)
Deck width78 ft (23.8 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,394 (2022)
Projected traffic6,394 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

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 Kirkwood Blvd over US 30 built?

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

What condition is Kirkwood Blvd over US 30 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 2023.

How much traffic does Kirkwood Blvd over US 30 carry?

About 6,394 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Kirkwood Blvd over US 30?

The structure is 272 ft (82.9 m) long with a longest span of 97 ft (29.6 m) and a deck 78 ft wide.

Who owns Kirkwood Blvd over US 30?

It is owned by the State Highway Agency.