US Bridges

Washington ST over Small Natural Stream

Fair

Grundy County, Iowa · 088181401 · Structure no. 000000000025980

Built
1969
56 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
1,528
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Washington ST over Small Natural Stream is a concrete continuous culvert carrying Washington ST 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 5 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 1,528 vehicles a day, roughly 22% of them trucks, projected to reach 1,528 by 2044. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesWashington ST
CrossesSmall Natural Stream
Location088181401
RouteCity Street 0
CountyGrundy County
StateIowa
Coordinates42.42845, -92.92516
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 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 traffic1,528 (2022)
Projected traffic1,528 by 2044
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Washington ST over Small Natural Stream built?

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

What condition is Washington ST 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 Washington ST over Small Natural Stream carry?

About 1,528 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is Washington ST over Small Natural Stream?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns Washington ST over Small Natural Stream?

It is owned by the City or Municipal Highway Agency.