US Bridges

SB I-35 over Stream

Fair

Hamilton County, Iowa · 1.8 Miles N of Sec RD D20 · Structure no. 000000000602580

Built
1972
53 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
8,200
2022 count
Owner
State
State Highway Agency

About this bridge

SB I-35 over Stream is a concrete continuous slab carrying SB I-35 over Stream in Hamilton County, Iowa. It was built in 1972, so it is 53 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 5 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 8,200 vehicles a day, roughly 31% of them trucks, projected to reach 8,200 by 2044. The structure is 93 ft (28.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB I-35
CrossesStream
Location1.8 Miles N of Sec RD D20
RouteInterstate 35
CountyHamilton County
StateIowa
Coordinates42.54086, -93.56731
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating46.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2022)
Projected traffic8,200 by 2044
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 SB I-35 over Stream built?

It was built in 1972, making it 53 years old in 2025.

What condition is SB I-35 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 May 2024.

How much traffic does SB I-35 over Stream carry?

About 8,200 vehicles per day (2022 count), of which roughly 31% are trucks.

How long is SB I-35 over Stream?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 43 ft wide.

Who owns SB I-35 over Stream?

It is owned by the State Highway Agency.