US Bridges

EB I-80 over CO RD (Z-30)

Fair

Scott County, Iowa · 3.5 Mi. W of Jct. US 67 · Structure no. 000000000047670

Built
1963
62 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
154 ft
3 main spans
Daily traffic
17,300
2023 count
Owner
State
State Highway Agency

About this bridge

EB I-80 over CO RD (Z-30) is a prestressed concrete stringer/multi-beam or girder carrying EB I-80 over CO RD (Z-30) in Scott County, Iowa. It was built in 1963, so it is 62 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 17,300 vehicles a day, roughly 29% of them trucks, projected to reach 17,300 by 2043. The structure is 154 ft (46.9 m) long and 36 ft wide.

CarriesEB I-80
CrossesCO RD (Z-30)
Location3.5 Mi. W of Jct. US 67
RouteInterstate 80
StateIowa
Coordinates41.59745, -90.43088
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.4 US tons
Inventory rating31.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length154 ft (46.9 m)
Longest span56 ft (17.1 m)
Deck width36 ft (11.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,300 (2023)
Projected traffic17,300 by 2043
Trucks29%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 EB I-80 over CO RD (Z-30) built?

It was built in 1963, making it 62 years old in 2025.

What condition is EB I-80 over CO RD (Z-30) 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 October 2023.

How much traffic does EB I-80 over CO RD (Z-30) carry?

About 17,300 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is EB I-80 over CO RD (Z-30)?

The structure is 154 ft (46.9 m) long with a longest span of 56 ft (17.1 m) and a deck 36 ft wide.

Who owns EB I-80 over CO RD (Z-30)?

It is owned by the State Highway Agency.