US Bridges

J ST over Prairie Creek

Poor

Linn County, Iowa · 000000000 · Structure no. 000000000001470

Built
1964
61 years old
Condition
Poor
inspected April 2023
Type
Slab
Concrete Continuous
Length
226 ft
5 main spans
Daily traffic
4,121
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

J ST over Prairie Creek is a concrete continuous slab carrying J ST over Prairie Creek in Linn County, Iowa. It was built in 1964, so it is 61 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 4,121 vehicles a day, projected to reach 4,121 by 2043. The structure is 226 ft (68.9 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesJ ST
CrossesPrairie Creek
Location000000000
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates41.9363, -91.66652
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66.6 US tons
Inventory rating39.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length226 ft (68.9 m)
Longest span49 ft (14.9 m)
Deck width34 ft (10.5 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,121 (2021)
Projected traffic4,121 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was J ST over Prairie Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is J ST over Prairie Creek 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 J ST over Prairie Creek carry?

About 4,121 vehicles per day (2021 count).

How long is J ST over Prairie Creek?

The structure is 226 ft (68.9 m) long with a longest span of 49 ft (14.9 m) and a deck 34 ft wide.

Who owns J ST over Prairie Creek?

It is owned by the City or Municipal Highway Agency.