US Bridges

US 169 over Stream

Good

Boone County, Iowa · 4.7 Mi. S of S Jct. US 30 · Structure no. 000000000605905

Built
1935
90 years old, rebuilt 1988
Condition
Good
inspected August 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
3,370
2022 count
Owner
State
State Highway Agency

About this bridge

US 169 over Stream is a concrete continuous culvert carrying US 169 over Stream in Boone County, Iowa. It was built in 1935 and reconstructed in 1988, so it is 90 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 3,370 vehicles a day, roughly 13% of them trucks, projected to reach 3,370 by 2044. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesUS 169
CrossesStream
Location4.7 Mi. S of S Jct. US 30
RouteU.S. Route 169
CountyBoone County
StateIowa
Coordinates41.96169, -94.02805
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length21 ft (6.4 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 traffic3,370 (2022)
Projected traffic3,370 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 US 169 over Stream built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1988.

What condition is US 169 over Stream 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 August 2024.

How much traffic does US 169 over Stream carry?

About 3,370 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is US 169 over Stream?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns US 169 over Stream?

It is owned by the State Highway Agency.