US Bridges

6th ST over Over UP RR

Fair

Linn County, Iowa · 000000000 · Structure no. 000000000033430

Built
1948
77 years old, rebuilt 2002
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
152 ft
3 main spans
Daily traffic
9,391
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

6th ST over Over UP RR is a prestressed concrete continuous stringer/multi-beam or girder carrying 6th ST over Over UP RR in Linn County, Iowa. It was built in 1948 and reconstructed in 2002, so it is 77 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 9,391 vehicles a day, projected to reach 9,391 by 2042. The structure is 152 ft (46.3 m) long and 73 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries6th ST
CrossesOver UP RR
Location000000000
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates41.93954, -91.6762
Functional classUrban Minor Arterial

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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.3 US tons
Inventory rating29.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length152 ft (46.3 m)
Longest span59 ft (18 m)
Deck width73 ft (22.3 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,391 (2022)
Projected traffic9,391 by 2042
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.2 mi (10 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 6th ST over Over UP RR built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2002.

What condition is 6th ST over Over UP 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 May 2023.

How much traffic does 6th ST over Over UP RR carry?

About 9,391 vehicles per day (2022 count).

How long is 6th ST over Over UP RR?

The structure is 152 ft (46.3 m) long with a longest span of 59 ft (18 m) and a deck 73 ft wide.

Who owns 6th ST over Over UP RR?

It is owned by the City or Municipal Highway Agency.