US Bridges

4th ST over Hinkle Creek

Poor

Benton County, Iowa · 085101700 · Structure no. 000000000011541

Built
1973
52 years old
Condition
Poor
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
103 ft
3 main spans
Daily traffic
3,197
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

4th ST over Hinkle Creek is a prestressed concrete tee beam carrying 4th ST over Hinkle Creek in Benton County, Iowa. It was built in 1973, so it is 52 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 3,197 vehicles a day, projected to reach 3,197 by 2043. The structure is 103 ft (31.4 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries4th ST
CrossesHinkle Creek
Location085101700
RouteCity Street 0
CountyBenton County
StateIowa
Coordinates42.16779, -92.03224
Functional classUrban Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length103 ft (31.4 m)
Longest span34 ft (10.4 m)
Deck width37 ft (11.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,197 (2021)
Projected traffic3,197 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 4th ST over Hinkle Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is 4th ST over Hinkle 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 4th ST over Hinkle Creek carry?

About 3,197 vehicles per day (2021 count).

How long is 4th ST over Hinkle Creek?

The structure is 103 ft (31.4 m) long with a longest span of 34 ft (10.4 m) and a deck 37 ft wide.

Who owns 4th ST over Hinkle Creek?

It is owned by the City or Municipal Highway Agency.