US Bridges

L Avenue over US 30

Good

Tama County, Iowa · 2.1 Mi. E of Jct. US 63 · Structure no. 000000000608685

Built
2008
17 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
250 ft
2 main spans
Daily traffic
1,100
2022 count
Owner
State
State Highway Agency

About this bridge

L Avenue over US 30 is a prestressed concrete stringer/multi-beam or girder carrying L Avenue over US 30 in Tama County, Iowa. It was built in 2008, so it is 17 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 1,100 vehicles a day, roughly 14% of them trucks, projected to reach 1,100 by 2044. The structure is 250 ft (76.2 m) long and 47 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesL Avenue
CrossesUS 30
Location2.1 Mi. E of Jct. US 63
RouteCounty Highway 0
StateIowa
Coordinates41.96707, -92.54709
Functional classRural Major Collector

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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length250 ft (76.2 m)
Longest span135 ft (41.1 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2022)
Projected traffic1,100 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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 L Avenue over US 30 built?

It was built in 2008, making it 17 years old in 2025.

What condition is L Avenue 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 December 2024.

How much traffic does L Avenue over US 30 carry?

About 1,100 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is L Avenue over US 30?

The structure is 250 ft (76.2 m) long with a longest span of 135 ft (41.1 m) and a deck 47 ft wide.

Who owns L Avenue over US 30?

It is owned by the State Highway Agency.