US Bridges

1st Ave N over East Des Moines River

Fair

Humboldt County, Iowa · 000000000 · Structure no. 000000000002851

Built
1988
37 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
260 ft
4 main spans
Daily traffic
1,014
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

1st Ave N over East Des Moines River is a prestressed concrete stringer/multi-beam or girder carrying 1st Ave N over East Des Moines River in Humboldt County, Iowa. It was built in 1988, so it is 37 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 1,014 vehicles a day, projected to reach 1,014 by 2043. The structure is 260 ft (79.2 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries1st Ave N
CrossesEast Des Moines River
Location000000000
RouteCity Street 0
CountyHumboldt County
StateIowa
Coordinates42.72288, -94.19326
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
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 alignment6: Equal to present minimum criteria
Operating rating76.5 US tons
Inventory rating40.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span65 ft (19.8 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,014 (2022)
Projected traffic1,014 by 2043
Trucks0%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 1st Ave N over East Des Moines River built?

It was built in 1988, making it 37 years old in 2025.

What condition is 1st Ave N over East Des Moines River 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 November 2022.

How much traffic does 1st Ave N over East Des Moines River carry?

About 1,014 vehicles per day (2022 count).

How long is 1st Ave N over East Des Moines River?

The structure is 260 ft (79.2 m) long with a longest span of 65 ft (19.8 m) and a deck 39 ft wide.

Who owns 1st Ave N over East Des Moines River?

It is owned by the City or Municipal Highway Agency.