US Bridges

16th Ave EB over Over UP RR & Street

Poor

Linn County, Iowa · C65750560 · Structure no. 000000000033420

Built
1937
88 years old, rebuilt 1984
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
660 ft
10 main spans
Daily traffic
3,200
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

16th Ave EB over Over UP RR & Street is a steel continuous stringer/multi-beam or girder carrying 16th Ave EB over Over UP RR & Street in Linn County, Iowa. It was built in 1937 and reconstructed in 1984, so it is 88 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 3,200 vehicles a day, projected to reach 3,200 by 2043. The structure is 660 ft (201.2 m) long and 39 ft wide.

Location

Open in Google Maps
Carries16th Ave EB
CrossesOver UP RR & Street
LocationC65750560
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates41.96208, -91.69126
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 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 rating75.8 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length660 ft (201.2 m)
Longest span80 ft (24.4 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2021)
Projected traffic3,200 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 16th Ave EB over Over UP RR & Street built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1984.

What condition is 16th Ave EB over Over UP RR & Street 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 April 2023.

How much traffic does 16th Ave EB over Over UP RR & Street carry?

About 3,200 vehicles per day (2021 count).

How long is 16th Ave EB over Over UP RR & Street?

The structure is 660 ft (201.2 m) long with a longest span of 80 ft (24.4 m) and a deck 39 ft wide.

Who owns 16th Ave EB over Over UP RR & Street?

It is owned by the City or Municipal Highway Agency.