US Bridges

4th Ave over Drainage

Good

Carroll County, Iowa · 000000000 · Structure no. 000000000003591

Built
1997
28 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
83 ft
1 main span
Daily traffic
1,018
2022 count
Owner
County
County Highway Agency

About this bridge

4th Ave over Drainage is a prestressed concrete stringer/multi-beam or girder carrying 4th Ave over Drainage in Carroll County, Iowa. It was built in 1997, so it is 28 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,018 vehicles a day, roughly 14% of them trucks, projected to reach 1,018 by 2044. The structure is 83 ft (25.3 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries4th Ave
CrossesDrainage
Location000000000
RouteCity Street 0
CountyCarroll County
StateIowa
Coordinates41.91044, -94.82215
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: 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 rating93.1 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length83 ft (25.3 m)
Longest span80 ft (24.4 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,018 (2022)
Projected traffic1,018 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 4th Ave over Drainage built?

It was built in 1997, making it 28 years old in 2025.

What condition is 4th Ave 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 March 2024.

How much traffic does 4th Ave over Drainage carry?

About 1,018 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is 4th Ave over Drainage?

The structure is 83 ft (25.3 m) long with a longest span of 80 ft (24.4 m) and a deck 33 ft wide.

Who owns 4th Ave over Drainage?

It is owned by the County Highway Agency.