Local over Hilton Creek

Fair

Iowa County, Iowa · 080100505 · Structure no. 000000000190351

Built: 1984; 41 years old
Condition: Fair; inspected March 2024
Type: Slab; Concrete Continuous
Length: 100 ft; 3 main spans
Daily traffic: 60; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Hilton Creek is a concrete continuous slab carrying Local over Hilton Creek in Iowa County, Iowa. It was built in 1984, so it is 41 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 60 vehicles a day, projected to reach 60 by 2044. The structure is 100 ft (30.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesLocal

CrossesHilton Creek

Location080100505

RouteCounty Highway 0

CountyIowa County

StateIowa

Coordinates41.76795, -92.03206

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.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionMarch 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating54.3 US tons

Inventory rating32.8 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length100 ft (30.5 m)

Longest span39 ft (11.9 m)

Deck width32 ft (9.8 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2022)

Projected traffic60 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

OwnerCounty Highway Agency

Maintained byCounty Highway Agency

Historic statusNot eligible for the National Register of Historic Places

Work proposedOther structural work, including hydraulic replacements

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Hilton Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Local over Hilton Creek 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 March 2024.

How much traffic does Local over Hilton Creek carry?

About 60 vehicles per day (2022 count).

How long is Local over Hilton Creek?

The structure is 100 ft (30.5 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns Local over Hilton Creek?

It is owned by the County Highway Agency.