US Bridges

NB US 61 over 225th Street

Fair

Clinton County, Iowa · 1.1 MI N of N Jct. US 30 · Structure no. 000000000602850

Built
1974
51 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
151 ft
3 main spans
Daily traffic
6,350
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 61 over 225th Street is a prestressed concrete stringer/multi-beam or girder carrying NB US 61 over 225th Street in Clinton County, Iowa. It was built in 1974, so it is 51 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 6,350 vehicles a day, roughly 16% of them trucks, projected to reach 6,350 by 2043. The structure is 151 ft (46 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB US 61
Crosses225th Street
Location1.1 MI N of N Jct. US 30
RouteU.S. Route 61
CountyClinton County
StateIowa
Coordinates41.84175, -90.56852
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.5 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length151 ft (46 m)
Longest span57 ft (17.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,350 (2022)
Projected traffic6,350 by 2043
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB US 61 over 225th Street built?

It was built in 1974, making it 51 years old in 2025.

What condition is NB US 61 over 225th Street 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 July 2023.

How much traffic does NB US 61 over 225th Street carry?

About 6,350 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is NB US 61 over 225th Street?

The structure is 151 ft (46 m) long with a longest span of 57 ft (17.4 m) and a deck 43 ft wide.

Who owns NB US 61 over 225th Street?

It is owned by the State Highway Agency.