120 TH over Stream

PoorPosted for load

Greene County, Iowa · 085321501 · Structure no. 000000000163350

Built: 1957; 68 years old
Condition: Poor; inspected May 2024
Type: Slab; Concrete Continuous
Length: 101 ft; 3 main spans
Daily traffic: 26; 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 1957, so it is 68 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 26 vehicles a day, roughly 31% of them trucks, projected to reach 26 by 2043. The structure is 101 ft (30.8 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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Carries120 TH

CrossesStream

Location085321501

RouteCounty Highway 0

CountyGreene County

StateIowa

Coordinates42.18068, -94.55266

Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	4 Poor	Advanced section loss, deterioration, spalling or scour.
Channel and channel protection	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionMay 2024

Inspection intervalevery 24 months

Operating statusPosted for load restriction

ScourFoundations stable; scour above top of footing

Structural evaluation4: Meets minimum tolerable limits to be left in place as is

Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment6: Equal to present minimum criteria

Operating rating21.9 US tons

Inventory rating13.1 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 15

Structure length101 ft (30.8 m)

Longest span39 ft (11.9 m)

Deck width22 ft (6.6 m)

Roadway width20 ft (6.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)

Projected traffic26 by 2043

Trucks31%

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 proposedReplacement because of substandard load-carrying capacity or roadway geometry

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was 120 TH over Stream built?

It was built in 1957, making it 68 years old in 2025.

What condition is 120 TH over Stream in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does 120 TH over Stream carry?

About 26 vehicles per day (2022 count), of which roughly 31% are trucks.

How long is 120 TH over Stream?

The structure is 101 ft (30.8 m) long with a longest span of 39 ft (11.9 m) and a deck 22 ft wide.

Who owns 120 TH over Stream?

It is owned by the County Highway Agency.