US Bridges

M64 380th ST over Small Stream

Fair

Crawford County, Iowa · 082371404 · Structure no. 000000000364210

Built
1992
33 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
349
2022 count
Owner
County
County Highway Agency

About this bridge

M64 380th ST over Small Stream is a concrete continuous culvert carrying M64 380th ST over Small Stream in Crawford County, Iowa. It was built in 1992, so it is 33 years old, younger 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 349 vehicles a day, roughly 24% of them trucks, projected to reach 349 by 2043. The structure is 21 ft (6.4 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM64 380th ST
CrossesSmall Stream
Location082371404
RouteCounty Highway 0
CountyCrawford County
StateIowa
Coordinates41.91331, -95.13143
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 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 alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating69.6 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 width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic349 (2022)
Projected traffic349 by 2043
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M64 380th ST over Small Stream built?

It was built in 1992, making it 33 years old in 2025.

What condition is M64 380th ST over Small 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 May 2023.

How much traffic does M64 380th ST over Small Stream carry?

About 349 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is M64 380th ST over Small Stream?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 36 ft wide.

Who owns M64 380th ST over Small Stream?

It is owned by the County Highway Agency.