US Bridges

120th Street over Stream

Fair

Page County, Iowa · 070361501 · Structure no. 000000000267631

Built
1990
35 years old
Condition
Fair
inspected November 2022
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

120th Street over Stream is a concrete continuous culvert carrying 120th Street over Stream in Page County, Iowa. It was built in 1990, so it is 35 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 45 vehicles a day, projected to reach 45 by 2042. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Carries120th Street
CrossesStream
Location070361501
RouteCounty Highway 0
StateIowa
Coordinates40.8717, -94.97475
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.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 by 2042
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 120th Street over Stream built?

It was built in 1990, making it 35 years old in 2025.

What condition is 120th Street 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 November 2022.

How much traffic does 120th Street over Stream carry?

About 45 vehicles per day (2022 count).

How long is 120th Street over Stream?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.4 m).

Who owns 120th Street over Stream?

It is owned by the County Highway Agency.