US Bridges

8th ST over Drainage

Good

Cedar County, Iowa · 082013500 · Structure no. 000000000007411

Built
2023
2 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
386
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

8th ST over Drainage is a concrete continuous culvert carrying 8th ST over Drainage in Cedar County, Iowa. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 386 vehicles a day, projected to reach 386 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

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Carries8th ST
CrossesDrainage
Location082013500
RouteCity Street 0
CountyCedar County
StateIowa
Coordinates41.86085, -90.93082
Functional classRural Local

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.
Culvert9 ExcellentNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length25 ft (7.6 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 traffic386 (2022)
Projected traffic386 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 8th ST over Drainage built?

It was built in 2023, making it 2 years old in 2025.

What condition is 8th ST over Drainage 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 May 2023.

How much traffic does 8th ST over Drainage carry?

About 386 vehicles per day (2022 count).

How long is 8th ST over Drainage?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns 8th ST over Drainage?

It is owned by the City or Municipal Highway Agency.