US Bridges

Ia 13 over Stream

Fair

Linn County, Iowa · 0.7 Mi. N of S JCT SR D62 · Structure no. 000000000033701

Built
1976
49 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
4,970
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 13 over Stream is a concrete continuous culvert carrying Ia 13 over Stream in Linn County, Iowa. It was built in 1976, so it is 49 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 6 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 4,970 vehicles a day, roughly 13% of them trucks, projected to reach 4,970 by 2044. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesIa 13
CrossesStream
Location0.7 Mi. N of S JCT SR D62
RouteState Highway 13
CountyLinn County
StateIowa
Coordinates42.28219, -91.51225
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating32.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,970 (2022)
Projected traffic4,970 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 13 over Stream built?

It was built in 1976, making it 49 years old in 2025.

What condition is Ia 13 over Stream 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 December 2024.

How much traffic does Ia 13 over Stream carry?

About 4,970 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Ia 13 over Stream?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).

Who owns Ia 13 over Stream?

It is owned by the State Highway Agency.