US Bridges

US 34 over City Reservoir Inlet

Good

Lucas County, Iowa · 1.8 Mi. E of Jct. Ia #14 · Structure no. 000000000034320

Built
1958
67 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
3,080
2022 count
Owner
State
State Highway Agency

About this bridge

US 34 over City Reservoir Inlet is a concrete continuous culvert carrying US 34 over City Reservoir Inlet in Lucas County, Iowa. It was built in 1958, so it is 67 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 3,080 vehicles a day, roughly 18% of them trucks, projected to reach 3,080 by 2044. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 24.2 mi (39 km).

CarriesUS 34
CrossesCity Reservoir Inlet
Location1.8 Mi. E of Jct. Ia #14
RouteU.S. Route 34
StateIowa
Coordinates41.00294, -93.27195
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 protection7 GoodSome minor problems.
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum 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 traffic3,080 (2022)
Projected traffic3,080 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 34 over City Reservoir Inlet built?

It was built in 1958, making it 67 years old in 2025.

What condition is US 34 over City Reservoir Inlet 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 34 over City Reservoir Inlet carry?

About 3,080 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is US 34 over City Reservoir Inlet?

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

Who owns US 34 over City Reservoir Inlet?

It is owned by the State Highway Agency.