US Bridges

S. 18th Ave over Over UP RR

Poor

Marshall County, Iowa · 084173100 · Structure no. 000000000503240

Built
1980
45 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
279 ft
3 main spans
Daily traffic
6,813
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

S. 18th Ave over Over UP RR is a prestressed concrete stringer/multi-beam or girder carrying S. 18th Ave over Over UP RR in Marshall County, Iowa. It was built in 1980, so it is 45 years old, younger 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 6,813 vehicles a day, projected to reach 6,813 by 2043. The structure is 279 ft (85 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS. 18th Ave
CrossesOver UP RR
Location084173100
RouteCity Street 0
CountyMarshall County
StateIowa
Coordinates42.04135, -92.88392
Functional classUrban Minor Arterial

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.5 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length279 ft (85 m)
Longest span77 ft (23.5 m)
Deck width69 ft (21 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,813 (2022)
Projected traffic6,813 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S. 18th Ave over Over UP RR built?

It was built in 1980, making it 45 years old in 2025.

What condition is S. 18th Ave over Over UP 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 July 2023.

How much traffic does S. 18th Ave over Over UP RR carry?

About 6,813 vehicles per day (2022 count).

How long is S. 18th Ave over Over UP RR?

The structure is 279 ft (85 m) long with a longest span of 77 ft (23.5 m) and a deck 69 ft wide.

Who owns S. 18th Ave over Over UP RR?

It is owned by the City or Municipal Highway Agency.