US Bridges

WB US 20 over Over Abandon RR

Good

Delaware County, Iowa · 0.4 Mi. W of Jct. Ia 38 · Structure no. 000000000602045

Built
1973
52 years old
Condition
Good
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

WB US 20 over Over Abandon RR is a prestressed concrete stringer/multi-beam or girder carrying WB US 20 over Over Abandon RR in Delaware County, Iowa. It was built in 1973, so it is 52 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 4,250 vehicles a day, roughly 28% of them trucks, projected to reach 4,250 by 2043. 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).

CarriesWB US 20
CrossesOver Abandon RR
Location0.4 Mi. W of Jct. Ia 38
RouteU.S. Route 20
StateIowa
Coordinates42.46947, -91.35209
Functional classRural Principal Arterial - Other

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 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 alignment7: Better than present minimum criteria
Operating rating86.2 US tons
Inventory rating37.3 US tons

Structure

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 (13.2 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,250 (2022)
Projected traffic4,250 by 2043
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 WB US 20 over Over Abandon RR built?

It was built in 1973, making it 52 years old in 2025.

What condition is WB US 20 over Over Abandon 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 November 2023.

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

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

How long is WB 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 WB US 20 over Over Abandon RR?

It is owned by the State Highway Agency.