US Bridges

EB US 20 over Over Abandon RR

Fair

Delaware County, Iowa · 0.4 MI W of JCT Iowa #38 · Structure no. 000000000602040

Built
1974
51 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
3 main spans
Daily traffic
4,250
2022 count
Owner
State
State Highway Agency

About this bridge

EB US 20 over Over Abandon RR is a prestressed concrete stringer/multi-beam or girder carrying EB US 20 over Over Abandon RR in Delaware 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 5 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 4,250 vehicles a day, roughly 28% of them trucks, projected to reach 4,250 by 2042. The structure is 192 ft (58.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEB US 20
CrossesOver Abandon RR
Location0.4 MI W of JCT Iowa #38
RouteU.S. Route 20
CountyDelaware County
StateIowa
Coordinates42.46918, -91.35286
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 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 rating77.3 US tons
Inventory rating52.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span69 ft (21 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,250 (2022)
Projected traffic4,250 by 2042
Trucks28%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 EB US 20 over Over Abandon RR built?

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

What condition is EB US 20 over Over Abandon RR 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 November 2023.

How much traffic does EB US 20 over Over Abandon RR carry?

About 4,250 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is EB US 20 over Over Abandon RR?

The structure is 192 ft (58.5 m) long with a longest span of 69 ft (21 m) and a deck 43 ft wide.

Who owns EB US 20 over Over Abandon RR?

It is owned by the State Highway Agency.