Ia 175 over Drainage Ditch

Fair

Hamilton County, Iowa · 0.2 Mi. E of E Jct. US 69 · Structure no. 000000000026521

Built: 1977; 48 years old
Condition: Fair; inspected March 2023
Type: Slab; Concrete Continuous
Length: 103 ft; 3 main spans
Daily traffic: 2,100; 2022 count
Owner: State; State Highway Agency

About this bridge

Ia 175 over Drainage Ditch is a concrete continuous slab carrying Ia 175 over Drainage Ditch in Hamilton County, Iowa. It was built in 1977, so it is 48 years old, older 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 2,100 vehicles a day, roughly 16% of them trucks, projected to reach 2,100 by 2042. The structure is 103 ft (31.4 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesIa 175

CrossesDrainage Ditch

Location0.2 Mi. E of E Jct. US 69

RouteState Highway 175

CountyHamilton County

StateIowa

Coordinates42.3069, -93.63679

Functional classRural Minor Arterial

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	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionMarch 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation6: Equal to present minimum criteria

Deck geometry4: Meets minimum tolerable limits to be left in place as is

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating61.3 US tons

Inventory rating36.8 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length103 ft (31.4 m)

Longest span39 ft (11.9 m)

Deck width41 ft (12.6 m)

Roadway width32 ft (9.8 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2022)

Projected traffic2,100 by 2042

Trucks16%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway and pedestrian

CrossesWaterway

Detour if closed3.7 mi (6 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 Ia 175 over Drainage Ditch built?

It was built in 1977, making it 48 years old in 2025.

What condition is Ia 175 over Drainage Ditch 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 2023.

How much traffic does Ia 175 over Drainage Ditch carry?

About 2,100 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Ia 175 over Drainage Ditch?

The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 41 ft wide.

Who owns Ia 175 over Drainage Ditch?

It is owned by the State Highway Agency.