US Bridges

US 218 over Hinkle Creek

Good

Benton County, Iowa · 1.3 Mi. N of Ia 150 · Structure no. 000000000014340

Built
1959
66 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
4,910
2022 count
Owner
State
State Highway Agency

About this bridge

US 218 over Hinkle Creek is a prestressed concrete stringer/multi-beam or girder carrying US 218 over Hinkle Creek in Benton County, Iowa. It was built in 1959, so it is 66 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,910 vehicles a day, roughly 9% of them trucks, projected to reach 4,910 by 2042. The structure is 133 ft (40.5 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 218
CrossesHinkle Creek
Location1.3 Mi. N of Ia 150
RouteU.S. Route 218
CountyBenton County
StateIowa
Coordinates42.16575, -92.03763
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.8 US tons
Inventory rating40.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span44 ft (13.4 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,910 (2022)
Projected traffic4,910 by 2042
Trucks9%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 218 over Hinkle Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is US 218 over Hinkle Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does US 218 over Hinkle Creek carry?

About 4,910 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is US 218 over Hinkle Creek?

The structure is 133 ft (40.5 m) long with a longest span of 44 ft (13.4 m) and a deck 36 ft wide.

Who owns US 218 over Hinkle Creek?

It is owned by the State Highway Agency.