US Bridges

F Ave Northwest over Cedar River

Poor

Linn County, Iowa · 000000000 · Structure no. 000000000605725

Built
1979
46 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
685 ft
10 main spans
Daily traffic
2,193
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

F Ave Northwest over Cedar River is a prestressed concrete stringer/multi-beam or girder carrying F Ave Northwest over Cedar River in Linn County, Iowa. It was built in 1979, so it is 46 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 2,193 vehicles a day, roughly 3% of them trucks, projected to reach 2,193 by 2042. The structure is 685 ft (208.8 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesF Ave Northwest
CrossesCedar River
Location000000000
RouteCity Street 0
StateIowa
Coordinates41.97937, -91.67195
Functional classUrban Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70.2 US tons
Inventory rating36.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length685 ft (208.8 m)
Longest span68 ft (20.7 m)
Deck width40 ft (12.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic2,193 (2022)
Projected traffic2,193 by 2042
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was F Ave Northwest over Cedar River built?

It was built in 1979, making it 46 years old in 2025.

What condition is F Ave Northwest over Cedar River 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 F Ave Northwest over Cedar River carry?

About 2,193 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is F Ave Northwest over Cedar River?

The structure is 685 ft (208.8 m) long with a longest span of 68 ft (20.7 m) and a deck 40 ft wide.

Who owns F Ave Northwest over Cedar River?

It is owned by the City or Municipal Highway Agency.