US Bridges

W 128th ST S over I-80

Good

Jasper County, Iowa · 2.8 Miles W of JCT Ia 117 · Structure no. 000000000030880

Built
1960
65 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
218 ft
4 main spans
Daily traffic
90
2022 count
Owner
State
State Highway Agency

About this bridge

W 128th ST S over I-80 is a prestressed concrete stringer/multi-beam or girder carrying W 128th ST S over I-80 in Jasper County, Iowa. It was built in 1960, so it is 65 years old, older 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 90 vehicles a day, roughly 22% of them trucks, projected to reach 90 by 2044. The structure is 218 ft (66.4 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesW 128th ST S
CrossesI-80
Location2.8 Miles W of JCT Ia 117
RouteCounty Highway 0
StateIowa
Coordinates41.68175, -93.29976
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.3 US tons
Inventory rating21.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length218 ft (66.4 m)
Longest span65 ft (19.8 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2022)
Projected traffic90 by 2044
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 W 128th ST S over I-80 built?

It was built in 1960, making it 65 years old in 2025.

What condition is W 128th ST S over I-80 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 August 2024.

How much traffic does W 128th ST S over I-80 carry?

About 90 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is W 128th ST S over I-80?

The structure is 218 ft (66.4 m) long with a longest span of 65 ft (19.8 m) and a deck 28 ft wide.

Who owns W 128th ST S over I-80?

It is owned by the State Highway Agency.