US Bridges

North Center ST over Iowa River

Good

Marshall County, Iowa · 084182600 · Structure no. 000000000243466

Built
2021
4 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
195 ft
2 main spans
Daily traffic
737
2022 count
Owner
County
County Highway Agency

About this bridge

North Center ST over Iowa River is a prestressed concrete stringer/multi-beam or girder carrying North Center ST over Iowa River in Marshall County, Iowa. It was built in 2021, so it is 4 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 737 vehicles a day, projected to reach 737 by 2044. The structure is 195 ft (59.4 m) long and 44 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesNorth Center ST
CrossesIowa River
Location084182600
RouteCounty Highway 0
CountyMarshall County
StateIowa
Coordinates42.06082, -92.91964
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length195 ft (59.4 m)
Longest span96 ft (29.3 m)
Deck width44 ft (13.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic737 (2022)
Projected traffic737 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 North Center ST over Iowa River built?

It was built in 2021, making it 4 years old in 2025.

What condition is North Center ST over Iowa River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does North Center ST over Iowa River carry?

About 737 vehicles per day (2022 count).

How long is North Center ST over Iowa River?

The structure is 195 ft (59.4 m) long with a longest span of 96 ft (29.3 m) and a deck 44 ft wide.

Who owns North Center ST over Iowa River?

It is owned by the County Highway Agency.