US Bridges

F Ave over Small Natural Stream

Fair

Grundy County, Iowa · 087181102 · Structure no. 000000000025970

Built
1969
56 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
1,169
2022 count
Owner
County
County Highway Agency

About this bridge

F Ave over Small Natural Stream is a concrete continuous culvert carrying F Ave over Small Natural Stream in Grundy County, Iowa. It was built in 1969, so it is 56 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,169 vehicles a day, roughly 26% of them trucks, projected to reach 1,169 by 2044. The structure is 21 ft (6.3 m) long and 74 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

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CarriesF Ave
CrossesSmall Natural Stream
Location087181102
RouteCounty Highway 0
CountyGrundy County
StateIowa
Coordinates42.35795, -92.92469
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.8 US tons
Inventory rating28.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.3 m)
Longest span10 ft (3 m)
Deck width74 ft (22.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,169 (2022)
Projected traffic1,169 by 2044
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was F Ave over Small Natural Stream built?

It was built in 1969, making it 56 years old in 2025.

What condition is F Ave over Small Natural Stream in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does F Ave over Small Natural Stream carry?

About 1,169 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is F Ave over Small Natural Stream?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m) and a deck 74 ft wide.

Who owns F Ave over Small Natural Stream?

It is owned by the County Highway Agency.