US Bridges

US 65 & 69 over South River Overflow

Good

Warren County, Iowa · 1.7 Mi. S of Ia 92 · Structure no. 000000000050901

Built
2011
14 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
5,400
2022 count
Owner
State
State Highway Agency

About this bridge

US 65 & 69 over South River Overflow is a concrete continuous culvert carrying US 65 & 69 over South River Overflow in Warren County, Iowa. It was built in 2011, so it is 14 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 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 5,400 vehicles a day, roughly 9% of them trucks, projected to reach 5,400 by 2044. The structure is 27 ft (8.1 m) long. If it were closed, the detour would be 26.1 mi (42 km).

CarriesUS 65 & 69
CrossesSouth River Overflow
Location1.7 Mi. S of Ia 92
RouteU.S. Route 65
StateIowa
Coordinates41.33328, -93.55833
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating25.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2022)
Projected traffic5,400 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 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 US 65 & 69 over South River Overflow built?

It was built in 2011, making it 14 years old in 2025.

What condition is US 65 & 69 over South River Overflow 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 October 2024.

How much traffic does US 65 & 69 over South River Overflow carry?

About 5,400 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is US 65 & 69 over South River Overflow?

The structure is 27 ft (8.1 m) long with a longest span of 12 ft (3.7 m).

Who owns US 65 & 69 over South River Overflow?

It is owned by the State Highway Agency.