120 TH over Stream

FairPosted for load

Greene County, Iowa · 085311401 · Structure no. 000000000163210

Built: 1967; 58 years old
Condition: Fair; inspected April 2024
Type: Slab; Concrete Continuous
Length: 79 ft; 3 main spans
Daily traffic: 15; 2022 count
Owner: County; County Highway Agency

About this bridge

120 TH over Stream is a concrete continuous slab carrying 120 TH over Stream in Greene County, Iowa. It was built in 1967, so it is 58 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. Its operating status is: posted for load restriction.

It carries about 15 vehicles a day, projected to reach 15 by 2043. The structure is 79 ft (24.1 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps

Carries120 TH

CrossesStream

Location085311401

RouteCounty Highway 0

CountyGreene County

StateIowa

Coordinates42.18045, -94.4346

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	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionApril 2024

Inspection intervalevery 24 months

Operating statusPosted for load restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating38.7 US tons

Inventory rating23.1 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length79 ft (24.1 m)

Longest span29 ft (8.8 m)

Deck width30 ft (9.1 m)

Roadway width28 ft (8.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)

Projected traffic15 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.7 mi (6 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 proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was 120 TH over Stream built?

It was built in 1967, making it 58 years old in 2025.

What condition is 120 TH over Stream 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 April 2024.

How much traffic does 120 TH over Stream carry?

About 15 vehicles per day (2022 count).

How long is 120 TH over Stream?

The structure is 79 ft (24.1 m) long with a longest span of 29 ft (8.8 m) and a deck 30 ft wide.

Who owns 120 TH over Stream?

It is owned by the County Highway Agency.