US Bridges

Clay ST over Over Iais RR

Good

Poweshiek County, Iowa · 080142303 · Structure no. 000000000000841

Built
2002
23 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
184 ft
3 main spans
Daily traffic
2,648
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Clay ST over Over Iais RR is a prestressed concrete stringer/multi-beam or girder carrying Clay ST over Over Iais RR in Poweshiek County, Iowa. It was built in 2002, so it is 23 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,648 vehicles a day, projected to reach 2,648 by 2043. The structure is 184 ft (56.1 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesClay ST
CrossesOver Iais RR
Location080142303
RouteCity Street 0
CountyPoweshiek County
StateIowa
Coordinates41.72798, -92.44397
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.1 US tons
Inventory rating39.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span69 ft (21 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,648 (2022)
Projected traffic2,648 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 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$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Clay ST over Over Iais RR built?

It was built in 2002, making it 23 years old in 2025.

What condition is Clay ST over Over Iais RR 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 December 2023.

How much traffic does Clay ST over Over Iais RR carry?

About 2,648 vehicles per day (2022 count).

How long is Clay ST over Over Iais RR?

The structure is 184 ft (56.1 m) long with a longest span of 69 ft (21 m) and a deck 35 ft wide.

Who owns Clay ST over Over Iais RR?

It is owned by the City or Municipal Highway Agency.