US Bridges

US 30 over Stream

Fair

Harrison County, Iowa · 0.8 Mi. E of Jct. SR F-58 · Structure no. 000000000027410

Built
1919
106 years old, rebuilt 1956
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
43 ft
1 main span
Daily traffic
6,800
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over Stream is a steel stringer/multi-beam or girder carrying US 30 over Stream in Harrison County, Iowa. It was built in 1919 and reconstructed in 1956, so it is 106 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.

It carries about 6,800 vehicles a day, roughly 18% of them trucks, projected to reach 6,800 by 2043. The structure is 43 ft (13.1 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesUS 30
CrossesStream
Location0.8 Mi. E of Jct. SR F-58
RouteU.S. Route 30
CountyHarrison County
StateIowa
Coordinates41.58466, -95.84517
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.6 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length43 ft (13.1 m)
Longest span38 ft (11.6 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,800 (2022)
Projected traffic6,800 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 30 over Stream built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1956.

What condition is US 30 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 July 2023.

How much traffic does US 30 over Stream carry?

About 6,800 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is US 30 over Stream?

The structure is 43 ft (13.1 m) long with a longest span of 38 ft (11.6 m) and a deck 35 ft wide.

Who owns US 30 over Stream?

It is owned by the State Highway Agency.