US Bridges

Walnut ST over Abandon RR

Poor

Marshall County, Iowa · 082200903 · Structure no. 000000000035561

Built
1977
48 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
187 ft
4 main spans
Daily traffic
689
2022 count
Owner
County
County Highway Agency

About this bridge

Walnut ST over Abandon RR is a prestressed concrete stringer/multi-beam or girder carrying Walnut ST over Abandon RR in Marshall County, Iowa. It was built in 1977, so it is 48 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 689 vehicles a day, projected to reach 689 by 2044. The structure is 187 ft (57 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesWalnut ST
CrossesAbandon RR
Location082200903
RouteCity Street 0
CountyMarshall County
StateIowa
Coordinates41.9255, -93.18291
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating69.1 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length187 ft (57 m)
Longest span55 ft (16.8 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic689 (2022)
Projected traffic689 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$494,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Walnut ST over Abandon RR built?

It was built in 1977, making it 48 years old in 2025.

What condition is Walnut ST over Abandon RR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Walnut ST over Abandon RR carry?

About 689 vehicles per day (2022 count).

How long is Walnut ST over Abandon RR?

The structure is 187 ft (57 m) long with a longest span of 55 ft (16.8 m) and a deck 35 ft wide.

Who owns Walnut ST over Abandon RR?

It is owned by the County Highway Agency.