US Bridges

First ST over UP RR

Fair

Linn County, Iowa · Mt Vernon Road · Structure no. 000000000501470

Built
1934
91 years old, rebuilt 1969
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
194 ft
5 main spans
Daily traffic
2,532
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

First ST over UP RR is a steel stringer/multi-beam or girder carrying First ST over UP RR in Linn County, Iowa. It was built in 1934 and reconstructed in 1969, so it is 91 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 2,532 vehicles a day, projected to reach 2,532 by 2043. The structure is 194 ft (59.1 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesFirst ST
CrossesUP RR
LocationMt Vernon Road
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates41.92989, -91.43075
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating70.3 US tons
Inventory rating53.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length194 ft (59.1 m)
Longest span48 ft (14.6 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,532 (2021)
Projected traffic2,532 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was First ST over UP RR built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1969.

What condition is First ST 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 March 2023.

How much traffic does First ST over UP RR carry?

About 2,532 vehicles per day (2021 count).

How long is First ST over UP RR?

The structure is 194 ft (59.1 m) long with a longest span of 48 ft (14.6 m) and a deck 30 ft wide.

Who owns First ST over UP RR?

It is owned by the City or Municipal Highway Agency.