125th Street over Small Stream

Good

Iowa County, Iowa · 081121411 · Structure no. 000000000191571

Built: 2022; 3 years old
Condition: Good; inspected March 2023
Type: Slab; Concrete Continuous
Length: 111 ft; 3 main spans
Daily traffic: 60; 2022 count
Owner: County; County Highway Agency

About this bridge

125th Street over Small Stream is a concrete continuous slab carrying 125th Street over Small Stream in Iowa County, Iowa. It was built in 2022, so it is 3 years old, younger 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 60 vehicles a day, projected to reach 60 by 2043. The structure is 111 ft (33.8 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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Carries125th Street

CrossesSmall Stream

Location081121411

RouteCounty Highway 0

CountyIowa County

StateIowa

Coordinates41.82723, -92.20163

Functional classRural Local

Condition and inspection

Good

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

Component	Rating	Meaning
Deck	9 Excellent	No problems noted.
Superstructure	9 Excellent	No problems noted.
Substructure	9 Excellent	No problems noted.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionMarch 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation9: Superior to present desirable criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is

Operating rating53.9 US tons

Inventory rating41.8 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHL 93

Structure length111 ft (33.8 m)

Longest span43 ft (13.1 m)

Deck width33 ft (10.1 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2022)

Projected traffic60 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.1 mi (5 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 125th Street over Small Stream built?

It was built in 2022, making it 3 years old in 2025.

What condition is 125th Street over Small Stream 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 March 2023.

How much traffic does 125th Street over Small Stream carry?

About 60 vehicles per day (2022 count).

How long is 125th Street over Small Stream?

The structure is 111 ft (33.8 m) long with a longest span of 43 ft (13.1 m) and a deck 33 ft wide.

Who owns 125th Street over Small Stream?

It is owned by the County Highway Agency.