US Bridges

Traer ST over Shellrock River

Fair

Butler County, Iowa · 093170103 · Structure no. 000000000005671

Built
1981
44 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
263 ft
3 main spans
Daily traffic
1,931
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Traer ST over Shellrock River is a steel continuous stringer/multi-beam or girder carrying Traer ST over Shellrock River in Butler County, Iowa. It was built in 1981, so it is 44 years old, younger 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 1,931 vehicles a day, projected to reach 1,931 by 2044. The structure is 263 ft (80.2 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTraer ST
CrossesShellrock River
Location093170103
RouteCity Street 0
CountyButler County
StateIowa
Coordinates42.89509, -92.80312
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length263 ft (80.2 m)
Longest span101 ft (30.8 m)
Deck width45 ft (13.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,931 (2022)
Projected traffic1,931 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$440,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Traer ST over Shellrock River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Traer ST over Shellrock River 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 April 2024.

How much traffic does Traer ST over Shellrock River carry?

About 1,931 vehicles per day (2022 count).

How long is Traer ST over Shellrock River?

The structure is 263 ft (80.2 m) long with a longest span of 101 ft (30.8 m) and a deck 45 ft wide.

Who owns Traer ST over Shellrock River?

It is owned by the City or Municipal Highway Agency.